diff --git a/integration/cli-hello-world/package.json b/integration/cli-hello-world/package.json
index b20b0c1402..ebae8dea93 100644
--- a/integration/cli-hello-world/package.json
+++ b/integration/cli-hello-world/package.json
@@ -43,6 +43,6 @@
     "protractor": "~5.1.2",
     "ts-node": "~4.1.0",
     "tslint": "~5.9.1",
-    "typescript": "2.4.2"
+    "typescript": "file:../../node_modules/typescript"
   }
 }
diff --git a/integration/cli-hello-world/yarn.lock b/integration/cli-hello-world/yarn.lock
index 32e19b502f..beee8bca08 100644
--- a/integration/cli-hello-world/yarn.lock
+++ b/integration/cli-hello-world/yarn.lock
@@ -28,9 +28,9 @@
     rxjs "^5.5.6"
 
 "@angular/animations@file:../../dist/packages-dist/animations":
-  version "6.0.0-beta.1-b36cc7db7"
+  version "6.0.0-beta.7-2027ec8895"
   dependencies:
-    tslib "^1.7.1"
+    tslib "^1.9.0"
 
 "@angular/cli@1.6.6":
   version "1.6.6"
@@ -97,55 +97,55 @@
     node-sass "^4.7.2"
 
 "@angular/common@file:../../dist/packages-dist/common":
-  version "6.0.0-beta.1-b36cc7db7"
+  version "6.0.0-beta.7-2027ec8895"
   dependencies:
-    tslib "^1.7.1"
+    tslib "^1.9.0"
 
 "@angular/compiler-cli@file:../../dist/packages-dist/compiler-cli":
-  version "6.0.0-beta.1-b36cc7db7"
+  version "6.0.0-beta.7-2027ec8895"
   dependencies:
     chokidar "^1.4.2"
     minimist "^1.2.0"
     reflect-metadata "^0.1.2"
-    tsickle "^0.26.0"
+    tsickle "^0.27.2"
 
 "@angular/compiler@file:../../dist/packages-dist/compiler":
-  version "6.0.0-beta.1-b36cc7db7"
+  version "6.0.0-beta.7-2027ec8895"
   dependencies:
-    tslib "^1.7.1"
+    tslib "^1.9.0"
 
 "@angular/core@file:../../dist/packages-dist/core":
-  version "6.0.0-beta.1-b36cc7db7"
+  version "6.0.0-beta.7-2027ec8895"
   dependencies:
-    tslib "^1.7.1"
+    tslib "^1.9.0"
 
 "@angular/forms@file:../../dist/packages-dist/forms":
-  version "6.0.0-beta.1-b36cc7db7"
+  version "6.0.0-beta.7-2027ec8895"
   dependencies:
-    tslib "^1.7.1"
+    tslib "^1.9.0"
 
 "@angular/http@file:../../dist/packages-dist/http":
-  version "6.0.0-beta.1-b36cc7db7"
+  version "6.0.0-beta.7-2027ec8895"
   dependencies:
-    tslib "^1.7.1"
+    tslib "^1.9.0"
 
 "@angular/language-service@file:../../dist/packages-dist/language-service":
-  version "6.0.0-beta.1-b36cc7db7"
+  version "6.0.0-beta.7-2027ec8895"
 
 "@angular/platform-browser-dynamic@file:../../dist/packages-dist/platform-browser-dynamic":
-  version "6.0.0-beta.1-b36cc7db7"
+  version "6.0.0-beta.7-2027ec8895"
   dependencies:
-    tslib "^1.7.1"
+    tslib "^1.9.0"
 
 "@angular/platform-browser@file:../../dist/packages-dist/platform-browser":
-  version "6.0.0-beta.1-b36cc7db7"
+  version "6.0.0-beta.7-2027ec8895"
   dependencies:
-    tslib "^1.7.1"
+    tslib "^1.9.0"
 
 "@angular/router@file:../../dist/packages-dist/router":
-  version "6.0.0-beta.1-b36cc7db7"
+  version "6.0.0-beta.7-2027ec8895"
   dependencies:
-    tslib "^1.7.1"
+    tslib "^1.9.0"
 
 "@ngtools/json-schema@1.1.0", "@ngtools/json-schema@^1.1.0":
   version "1.1.0"
@@ -6366,7 +6366,7 @@ source-map-resolve@^0.5.0:
     source-map-url "^0.4.0"
     urix "^0.1.0"
 
-source-map-support@^0.4.1, source-map-support@^0.4.2, source-map-support@~0.4.0:
+source-map-support@^0.4.1, source-map-support@~0.4.0:
   version "0.4.18"
   resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.4.18.tgz#0286a6de8be42641338594e97ccea75f0a2c585f"
   dependencies:
@@ -6854,16 +6854,16 @@ tsconfig@^7.0.0:
     strip-bom "^3.0.0"
     strip-json-comments "^2.0.0"
 
-tsickle@^0.26.0:
-  version "0.26.0"
-  resolved "https://registry.yarnpkg.com/tsickle/-/tsickle-0.26.0.tgz#40b30a2dd6abcb33b182e37596674bd1cfe4039c"
+tsickle@^0.27.2:
+  version "0.27.2"
+  resolved "https://registry.yarnpkg.com/tsickle/-/tsickle-0.27.2.tgz#f33d46d046f73dd5c155a37922e422816e878736"
   dependencies:
     minimist "^1.2.0"
     mkdirp "^0.5.1"
-    source-map "^0.5.6"
-    source-map-support "^0.4.2"
+    source-map "^0.6.0"
+    source-map-support "^0.5.0"
 
-tslib@^1.7.1, tslib@^1.8.0, tslib@^1.8.1:
+tslib@^1.8.0, tslib@^1.8.1, tslib@^1.9.0:
   version "1.9.0"
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.9.0.tgz#e37a86fda8cbbaf23a057f473c9f4dc64e5fc2e8"
 
@@ -6929,9 +6929,8 @@ typedarray@^0.0.6, typedarray@~0.0.5:
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
 
-typescript@2.4.2:
-  version "2.4.2"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.4.2.tgz#f8395f85d459276067c988aa41837a8f82870844"
+"typescript@file:../../node_modules/typescript":
+  version "2.7.2"
 
 typescript@~2.6.2:
   version "2.6.2"
diff --git a/package.json b/package.json
index ae8657fe87..6ffe69e980 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
   "dependencies": {
     "core-js": "^2.4.1",
     "reflect-metadata": "^0.1.3",
-    "rxjs": "5.5.5",
+    "rxjs": "5.5.6",
     "tslib": "^1.7.1",
     "zone.js": "^0.8.12"
   },
@@ -104,7 +104,7 @@
     "tslint": "5.7.0",
     "tslint-eslint-rules": "4.1.1",
     "tsutils": "2.20.0",
-    "typescript": "2.6.x",
+    "typescript": "2.7.x",
     "uglify-js": "2.8.29",
     "universal-analytics": "0.4.15",
     "vlq": "0.2.2",
diff --git a/packages/bazel/package.json b/packages/bazel/package.json
index cb59349c09..a1a665eb13 100644
--- a/packages/bazel/package.json
+++ b/packages/bazel/package.json
@@ -13,7 +13,7 @@
   },
   "peerDependencies": {
     "@angular/compiler-cli": "0.0.0-PLACEHOLDER",
-    "typescript": ">=2.4.2 <2.7"
+    "typescript": ">=2.7.2 <2.8"
   },
   "repository": {
     "type": "git",
diff --git a/packages/compiler-cli/package.json b/packages/compiler-cli/package.json
index 4b04290089..9996f94379 100644
--- a/packages/compiler-cli/package.json
+++ b/packages/compiler-cli/package.json
@@ -15,7 +15,7 @@
     "chokidar": "^1.4.2"
   },
   "peerDependencies": {
-    "typescript": ">=2.4.2 <2.7",
+    "typescript": ">=2.7.2 <2.8",
     "@angular/compiler": "0.0.0-PLACEHOLDER"
   },
   "repository": {
diff --git a/packages/compiler-cli/src/diagnostics/typescript_symbols.ts b/packages/compiler-cli/src/diagnostics/typescript_symbols.ts
index fd31380319..6490e969ac 100644
--- a/packages/compiler-cli/src/diagnostics/typescript_symbols.ts
+++ b/packages/compiler-cli/src/diagnostics/typescript_symbols.ts
@@ -46,7 +46,9 @@ export function getClassMembers(
   if (declaration) {
     const type = checker.getTypeAtLocation(declaration);
     const node = program.getSourceFile(staticSymbol.filePath);
-    return new TypeWrapper(type, {node, program, checker}).members();
+    if (node) {
+      return new TypeWrapper(type, {node, program, checker}).members();
+    }
   }
 }
 
diff --git a/packages/compiler-cli/src/transformers/lower_expressions.ts b/packages/compiler-cli/src/transformers/lower_expressions.ts
index 0793782a50..6134d62c84 100644
--- a/packages/compiler-cli/src/transformers/lower_expressions.ts
+++ b/packages/compiler-cli/src/transformers/lower_expressions.ts
@@ -190,9 +190,12 @@ export function getExpressionLoweringTransformFactory(
   // Return the factory
   return (context: ts.TransformationContext) => (sourceFile: ts.SourceFile): ts.SourceFile => {
     // We need to use the original SourceFile for reading metadata, and not the transformed one.
-    const requests = requestsMap.getRequests(program.getSourceFile(sourceFile.fileName));
-    if (requests && requests.size) {
-      return transformSourceFile(sourceFile, requests, context);
+    const originalFile = program.getSourceFile(sourceFile.fileName);
+    if (originalFile) {
+      const requests = requestsMap.getRequests(originalFile);
+      if (requests && requests.size) {
+        return transformSourceFile(sourceFile, requests, context);
+      }
     }
     return sourceFile;
   };
diff --git a/packages/compiler-cli/src/transformers/program.ts b/packages/compiler-cli/src/transformers/program.ts
index 012f605a1e..5f25218013 100644
--- a/packages/compiler-cli/src/transformers/program.ts
+++ b/packages/compiler-cli/src/transformers/program.ts
@@ -73,9 +73,9 @@ class AngularCompilerProgram implements Program {
       private host: CompilerHost, oldProgram?: Program) {
     this.rootNames = [...rootNames];
 
-    if (ts.version < '2.4.2' || (ts.version >= '2.7.0' && !options.disableTypeScriptVersionCheck)) {
+    if (ts.version < '2.7.2' || (ts.version >= '2.8.0' && !options.disableTypeScriptVersionCheck)) {
       throw new Error(
-          `The Angular Compiler requires TypeScript >=2.4.2 and <2.7 but ${ts.version} was found instead.`);
+          `The Angular Compiler requires TypeScript >=2.7.2 and <2.8.0 but ${ts.version} was found instead.`);
     }
 
     this.oldTsProgram = oldProgram ? oldProgram.getTsProgram() : undefined;
@@ -304,7 +304,10 @@ class AngularCompilerProgram implements Program {
             genFile = genFileByFileName.get(sourceFile.fileName);
             if (!sourceFile.isDeclarationFile && !GENERATED_FILES.test(sourceFile.fileName)) {
               // Note: sourceFile is the transformed sourcefile, not the original one!
-              emittedSourceFiles.push(this.tsProgram.getSourceFile(sourceFile.fileName));
+              const originalFile = this.tsProgram.getSourceFile(sourceFile.fileName);
+              if (originalFile) {
+                emittedSourceFiles.push(originalFile);
+              }
             }
           }
           this.writeFile(outFileName, outData, writeByteOrderMark, onError, genFile, sourceFiles);
diff --git a/packages/compiler-cli/test/diagnostics/mocks.ts b/packages/compiler-cli/test/diagnostics/mocks.ts
index 13cbbce3d0..76226efad2 100644
--- a/packages/compiler-cli/test/diagnostics/mocks.ts
+++ b/packages/compiler-cli/test/diagnostics/mocks.ts
@@ -240,16 +240,18 @@ export function getDiagnosticTemplateInfo(
     const members = getClassMembers(context.program, context.checker, type);
     if (members) {
       const sourceFile = context.program.getSourceFile(type.filePath);
-      const query = getSymbolQuery(
-          context.program, context.checker, sourceFile,
-          () =>
-              getPipesTable(sourceFile, context.program, context.checker, compiledTemplate.pipes));
-      return {
-        fileName: templateFile,
-        offset: 0, query, members,
-        htmlAst: compiledTemplate.htmlAst,
-        templateAst: compiledTemplate.templateAst
-      };
+      if (sourceFile) {
+        const query = getSymbolQuery(
+            context.program, context.checker, sourceFile,
+            () => getPipesTable(
+                sourceFile, context.program, context.checker, compiledTemplate.pipes));
+        return {
+          fileName: templateFile,
+          offset: 0, query, members,
+          htmlAst: compiledTemplate.htmlAst,
+          templateAst: compiledTemplate.templateAst
+        };
+      }
     }
   }
 }
diff --git a/packages/compiler-cli/test/diagnostics/symbol_query_spec.ts b/packages/compiler-cli/test/diagnostics/symbol_query_spec.ts
index 7073f8958d..09d536e643 100644
--- a/packages/compiler-cli/test/diagnostics/symbol_query_spec.ts
+++ b/packages/compiler-cli/test/diagnostics/symbol_query_spec.ts
@@ -41,7 +41,7 @@ describe('symbol query', () => {
     const service = ts.createLanguageService(host, registry);
     program = service.getProgram();
     checker = program.getTypeChecker();
-    sourceFile = program.getSourceFile('/quickstart/app/app.component.ts');
+    sourceFile = program.getSourceFile('/quickstart/app/app.component.ts') !;
     const options: CompilerOptions = Object.create(host.getCompilationSettings());
     options.genDir = '/dist';
     options.basePath = '/quickstart';
diff --git a/packages/compiler-cli/test/metadata/collector_spec.ts b/packages/compiler-cli/test/metadata/collector_spec.ts
index 9d4bbf7e0e..4b0128f772 100644
--- a/packages/compiler-cli/test/metadata/collector_spec.ts
+++ b/packages/compiler-cli/test/metadata/collector_spec.ts
@@ -47,13 +47,13 @@ describe('Collector', () => {
   it('should not have errors in test data', () => { expectValidSources(service, program); });
 
   it('should return undefined for modules that have no metadata', () => {
-    const sourceFile = program.getSourceFile('app/empty.ts');
+    const sourceFile = program.getSourceFile('app/empty.ts') !;
     const metadata = collector.getMetadata(sourceFile);
     expect(metadata).toBeUndefined();
   });
 
   it('should treat all symbols of .d.ts files as exported', () => {
-    const sourceFile = program.getSourceFile('declarations.d.ts');
+    const sourceFile = program.getSourceFile('declarations.d.ts') !;
     const metadata = collector.getMetadata(sourceFile);
     expect(metadata).toEqual({
       __symbolic: 'module',
@@ -66,7 +66,7 @@ describe('Collector', () => {
   });
 
   it('should return an interface reference for types', () => {
-    const sourceFile = program.getSourceFile('/exported-type.ts');
+    const sourceFile = program.getSourceFile('/exported-type.ts') !;
     const metadata = collector.getMetadata(sourceFile);
     expect(metadata).toEqual({
       __symbolic: 'module',
@@ -76,7 +76,7 @@ describe('Collector', () => {
   });
 
   it('should return an interface reference for interfaces', () => {
-    const sourceFile = program.getSourceFile('app/hero.ts');
+    const sourceFile = program.getSourceFile('app/hero.ts') !;
     const metadata = collector.getMetadata(sourceFile);
     expect(metadata).toEqual({
       __symbolic: 'module',
@@ -86,13 +86,13 @@ describe('Collector', () => {
   });
 
   it('should preserve module names from TypeScript sources', () => {
-    const sourceFile = program.getSourceFile('named-module.d.ts');
+    const sourceFile = program.getSourceFile('named-module.d.ts') !;
     const metadata = collector.getMetadata(sourceFile);
     expect(metadata !['importAs']).toEqual('some-named-module');
   });
 
   it('should be able to collect a simple component\'s metadata', () => {
-    const sourceFile = program.getSourceFile('app/hero-detail.component.ts');
+    const sourceFile = program.getSourceFile('app/hero-detail.component.ts') !;
     const metadata = collector.getMetadata(sourceFile);
     expect(metadata).toEqual({
       __symbolic: 'module',
@@ -144,7 +144,7 @@ describe('Collector', () => {
   });
 
   it('should be able to get a more complicated component\'s metadata', () => {
-    const sourceFile = program.getSourceFile('/app/app.component.ts');
+    const sourceFile = program.getSourceFile('/app/app.component.ts') !;
     const metadata = collector.getMetadata(sourceFile);
     expect(metadata).toEqual({
       __symbolic: 'module',
@@ -236,7 +236,7 @@ describe('Collector', () => {
   });
 
   it('should return the values of exported variables', () => {
-    const sourceFile = program.getSourceFile('/app/mock-heroes.ts');
+    const sourceFile = program.getSourceFile('/app/mock-heroes.ts') !;
     const metadata = collector.getMetadata(sourceFile);
     expect(metadata).toEqual({
       __symbolic: 'module',
@@ -262,7 +262,7 @@ describe('Collector', () => {
   let casesMetadata: ModuleMetadata;
 
   beforeEach(() => {
-    casesFile = program.getSourceFile('/app/cases-data.ts');
+    casesFile = program.getSourceFile('/app/cases-data.ts') !;
     casesMetadata = collector.getMetadata(casesFile) !;
   });
 
@@ -322,7 +322,7 @@ describe('Collector', () => {
   });
 
   it('should report errors for destructured imports', () => {
-    const unsupported1 = program.getSourceFile('/unsupported-1.ts');
+    const unsupported1 = program.getSourceFile('/unsupported-1.ts') !;
     const metadata = collector.getMetadata(unsupported1);
     expect(metadata).toEqual({
       __symbolic: 'module',
@@ -338,7 +338,7 @@ describe('Collector', () => {
   });
 
   it('should report an error for references to unexpected types', () => {
-    const unsupported1 = program.getSourceFile('/unsupported-2.ts');
+    const unsupported1 = program.getSourceFile('/unsupported-2.ts') !;
     const metadata = collector.getMetadata(unsupported1) !;
     const barClass = <ClassMetadata>metadata.metadata['Bar'];
     const ctor = <ConstructorMetadata>barClass.members !['__ctor__'][0];
@@ -353,7 +353,7 @@ describe('Collector', () => {
   });
 
   it('should be able to handle import star type references', () => {
-    const importStar = program.getSourceFile('/import-star.ts');
+    const importStar = program.getSourceFile('/import-star.ts') !;
     const metadata = collector.getMetadata(importStar) !;
     const someClass = <ClassMetadata>metadata.metadata['SomeClass'];
     const ctor = <ConstructorMetadata>someClass.members !['__ctor__'][0];
@@ -364,7 +364,7 @@ describe('Collector', () => {
   });
 
   it('should record all exported classes', () => {
-    const sourceFile = program.getSourceFile('/exported-classes.ts');
+    const sourceFile = program.getSourceFile('/exported-classes.ts') !;
     const metadata = collector.getMetadata(sourceFile);
     expect(metadata).toEqual({
       __symbolic: 'module',
@@ -378,7 +378,7 @@ describe('Collector', () => {
   });
 
   it('should be able to record functions', () => {
-    const exportedFunctions = program.getSourceFile('/exported-functions.ts');
+    const exportedFunctions = program.getSourceFile('/exported-functions.ts') !;
     const metadata = collector.getMetadata(exportedFunctions);
     expect(metadata).toEqual({
       __symbolic: 'module',
@@ -438,7 +438,7 @@ describe('Collector', () => {
   });
 
   it('should be able to handle import star type references', () => {
-    const importStar = program.getSourceFile('/import-star.ts');
+    const importStar = program.getSourceFile('/import-star.ts') !;
     const metadata = collector.getMetadata(importStar) !;
     const someClass = <ClassMetadata>metadata.metadata['SomeClass'];
     const ctor = <ConstructorMetadata>someClass.members !['__ctor__'][0];
@@ -449,14 +449,14 @@ describe('Collector', () => {
   });
 
   it('should be able to collect the value of an enum', () => {
-    const enumSource = program.getSourceFile('/exported-enum.ts');
+    const enumSource = program.getSourceFile('/exported-enum.ts') !;
     const metadata = collector.getMetadata(enumSource) !;
     const someEnum: any = metadata.metadata['SomeEnum'];
     expect(someEnum).toEqual({A: 0, B: 1, C: 100, D: 101});
   });
 
   it('should ignore a non-export enum', () => {
-    const enumSource = program.getSourceFile('/private-enum.ts');
+    const enumSource = program.getSourceFile('/private-enum.ts') !;
     const metadata = collector.getMetadata(enumSource) !;
     const publicEnum: any = metadata.metadata['PublicEnum'];
     const privateEnum: any = metadata.metadata['PrivateEnum'];
@@ -465,7 +465,7 @@ describe('Collector', () => {
   });
 
   it('should be able to collect enums initialized from consts', () => {
-    const enumSource = program.getSourceFile('/exported-enum.ts');
+    const enumSource = program.getSourceFile('/exported-enum.ts') !;
     const metadata = collector.getMetadata(enumSource) !;
     const complexEnum: any = metadata.metadata['ComplexEnum'];
     expect(complexEnum).toEqual({
@@ -484,7 +484,7 @@ describe('Collector', () => {
   });
 
   it('should be able to collect a simple static method', () => {
-    const staticSource = program.getSourceFile('/static-method.ts');
+    const staticSource = program.getSourceFile('/static-method.ts') !;
     const metadata = collector.getMetadata(staticSource) !;
     expect(metadata).toBeDefined();
     const classData = <ClassMetadata>metadata.metadata['MyModule'];
@@ -502,7 +502,7 @@ describe('Collector', () => {
   });
 
   it('should be able to collect a call to a static method', () => {
-    const staticSource = program.getSourceFile('/static-method-call.ts');
+    const staticSource = program.getSourceFile('/static-method-call.ts') !;
     const metadata = collector.getMetadata(staticSource) !;
     expect(metadata).toBeDefined();
     const classData = <ClassMetadata>metadata.metadata['Foo'];
@@ -537,7 +537,7 @@ describe('Collector', () => {
   });
 
   it('should be able to collect a static field', () => {
-    const staticSource = program.getSourceFile('/static-field.ts');
+    const staticSource = program.getSourceFile('/static-field.ts') !;
     const metadata = collector.getMetadata(staticSource) !;
     expect(metadata).toBeDefined();
     const classData = <ClassMetadata>metadata.metadata['MyModule'];
@@ -546,7 +546,7 @@ describe('Collector', () => {
   });
 
   it('should be able to collect a reference to a static field', () => {
-    const staticSource = program.getSourceFile('/static-field-reference.ts');
+    const staticSource = program.getSourceFile('/static-field-reference.ts') !;
     const metadata = collector.getMetadata(staticSource) !;
     expect(metadata).toBeDefined();
     const classData = <ClassMetadata>metadata.metadata['Foo'];
@@ -580,7 +580,7 @@ describe('Collector', () => {
   });
 
   it('should be able to collect a method with a conditional expression', () => {
-    const source = program.getSourceFile('/static-method-with-if.ts');
+    const source = program.getSourceFile('/static-method-with-if.ts') !;
     const metadata = collector.getMetadata(source) !;
     expect(metadata).toBeDefined();
     const classData = <ClassMetadata>metadata.metadata['MyModule'];
@@ -605,7 +605,7 @@ describe('Collector', () => {
   });
 
   it('should be able to collect a method with a default parameter', () => {
-    const source = program.getSourceFile('/static-method-with-default.ts');
+    const source = program.getSourceFile('/static-method-with-default.ts') !;
     const metadata = collector.getMetadata(source) !;
     expect(metadata).toBeDefined();
     const classData = <ClassMetadata>metadata.metadata['MyModule'];
@@ -634,7 +634,7 @@ describe('Collector', () => {
   });
 
   it('should be able to collect re-exported symbols', () => {
-    const source = program.getSourceFile('/re-exports.ts');
+    const source = program.getSourceFile('/re-exports.ts') !;
     const metadata = collector.getMetadata(source) !;
     expect(metadata.exports).toEqual([
       {from: './static-field', export: ['MyModule']},
@@ -644,13 +644,13 @@ describe('Collector', () => {
   });
 
   it('should be able to collect a export as symbol', () => {
-    const source = program.getSourceFile('export-as.d.ts');
+    const source = program.getSourceFile('export-as.d.ts') !;
     const metadata = collector.getMetadata(source) !;
     expect(metadata.metadata).toEqual({SomeFunction: {__symbolic: 'function'}});
   });
 
   it('should be able to collect exports with no module specifier', () => {
-    const source = program.getSourceFile('/re-exports-2.ts');
+    const source = program.getSourceFile('/re-exports-2.ts') !;
     const metadata = collector.getMetadata(source) !;
     expect(metadata.metadata).toEqual({
       MyClass: Object({__symbolic: 'class'}),
@@ -672,7 +672,7 @@ describe('Collector', () => {
   });
 
   it('should collect an error symbol if collecting a reference to a non-exported symbol', () => {
-    const source = program.getSourceFile('/local-symbol-ref.ts');
+    const source = program.getSourceFile('/local-symbol-ref.ts') !;
     const metadata = collector.getMetadata(source) !;
     expect(metadata.metadata).toEqual({
       REQUIRED_VALIDATOR: {
@@ -700,7 +700,7 @@ describe('Collector', () => {
   });
 
   it('should collect an error symbol if collecting a reference to a non-exported function', () => {
-    const source = program.getSourceFile('/local-function-ref.ts');
+    const source = program.getSourceFile('/local-function-ref.ts') !;
     const metadata = collector.getMetadata(source) !;
     expect(metadata.metadata).toEqual({
       REQUIRED_VALIDATOR: {
@@ -728,7 +728,7 @@ describe('Collector', () => {
   });
 
   it('should collect an error for a simple function that references a local variable', () => {
-    const source = program.getSourceFile('/local-symbol-ref-func.ts');
+    const source = program.getSourceFile('/local-symbol-ref-func.ts') !;
     const metadata = collector.getMetadata(source) !;
     expect(metadata.metadata).toEqual({
       foo: {
@@ -746,7 +746,7 @@ describe('Collector', () => {
   });
 
   it('should collect any for interface parameter reference', () => {
-    const source = program.getSourceFile('/interface-reference.ts');
+    const source = program.getSourceFile('/interface-reference.ts') !;
     const metadata = collector.getMetadata(source) !;
     expect((metadata.metadata['SomeClass'] as ClassMetadata).members).toEqual({
       __ctor__: [{
@@ -886,24 +886,24 @@ describe('Collector', () => {
 
   describe('in strict mode', () => {
     it('should throw if an error symbol is collecting a reference to a non-exported symbol', () => {
-      const source = program.getSourceFile('/local-symbol-ref.ts');
+      const source = program.getSourceFile('/local-symbol-ref.ts') !;
       expect(() => collector.getMetadata(source, true)).toThrowError(/Reference to a local symbol/);
     });
 
     it('should throw if an error if collecting a reference to a non-exported function', () => {
-      const source = program.getSourceFile('/local-function-ref.ts');
+      const source = program.getSourceFile('/local-function-ref.ts') !;
       expect(() => collector.getMetadata(source, true))
           .toThrowError(/Reference to a non-exported function/);
     });
 
     it('should throw for references to unexpected types', () => {
-      const unsupported2 = program.getSourceFile('/unsupported-2.ts');
+      const unsupported2 = program.getSourceFile('/unsupported-2.ts') !;
       expect(() => collector.getMetadata(unsupported2, true))
           .toThrowError(/Reference to non-exported class/);
     });
 
     it('should throw for errors in a static method', () => {
-      const unsupported3 = program.getSourceFile('/unsupported-3.ts');
+      const unsupported3 = program.getSourceFile('/unsupported-3.ts') !;
       expect(() => collector.getMetadata(unsupported3, true))
           .toThrowError(/Reference to a non-exported class/);
     });
@@ -913,33 +913,33 @@ describe('Collector', () => {
     it('should not throw with a class with no name', () => {
       const fileName = '/invalid-class.ts';
       override(fileName, 'export class');
-      const invalidClass = program.getSourceFile(fileName);
+      const invalidClass = program.getSourceFile(fileName) !;
       expect(() => collector.getMetadata(invalidClass)).not.toThrow();
     });
 
     it('should not throw with a function with no name', () => {
       const fileName = '/invalid-function.ts';
       override(fileName, 'export function');
-      const invalidFunction = program.getSourceFile(fileName);
+      const invalidFunction = program.getSourceFile(fileName) !;
       expect(() => collector.getMetadata(invalidFunction)).not.toThrow();
     });
   });
 
   describe('inheritance', () => {
     it('should record `extends` clauses for declared classes', () => {
-      const metadata = collector.getMetadata(program.getSourceFile('/class-inheritance.ts')) !;
+      const metadata = collector.getMetadata(program.getSourceFile('/class-inheritance.ts') !) !;
       expect(metadata.metadata['DeclaredChildClass'])
           .toEqual({__symbolic: 'class', extends: {__symbolic: 'reference', name: 'ParentClass'}});
     });
 
     it('should record `extends` clauses for classes in the same file', () => {
-      const metadata = collector.getMetadata(program.getSourceFile('/class-inheritance.ts')) !;
+      const metadata = collector.getMetadata(program.getSourceFile('/class-inheritance.ts') !) !;
       expect(metadata.metadata['ChildClassSameFile'])
           .toEqual({__symbolic: 'class', extends: {__symbolic: 'reference', name: 'ParentClass'}});
     });
 
     it('should record `extends` clauses for classes in a different file', () => {
-      const metadata = collector.getMetadata(program.getSourceFile('/class-inheritance.ts')) !;
+      const metadata = collector.getMetadata(program.getSourceFile('/class-inheritance.ts') !) !;
       expect(metadata.metadata['ChildClassOtherFile']).toEqual({
         __symbolic: 'class',
         extends: {
@@ -959,7 +959,7 @@ describe('Collector', () => {
     }
 
     it('should collect the correct arity for a class', () => {
-      const metadata = collector.getMetadata(program.getSourceFile('/class-arity.ts')) !;
+      const metadata = collector.getMetadata(program.getSourceFile('/class-arity.ts') !) !;
 
       const zero = metadata.metadata['Zero'];
       if (expectClass(zero)) expect(zero.arity).toBeUndefined();
diff --git a/packages/compiler-cli/test/metadata/evaluator_spec.ts b/packages/compiler-cli/test/metadata/evaluator_spec.ts
index b08492dda4..efb88c7d9d 100644
--- a/packages/compiler-cli/test/metadata/evaluator_spec.ts
+++ b/packages/compiler-cli/test/metadata/evaluator_spec.ts
@@ -47,7 +47,7 @@ describe('Evaluator', () => {
   });
 
   it('should be able to fold literal expressions', () => {
-    const consts = program.getSourceFile('consts.ts');
+    const consts = program.getSourceFile('consts.ts') !;
     expect(evaluator.isFoldable(findVarInitializer(consts, 'someName'))).toBeTruthy();
     expect(evaluator.isFoldable(findVarInitializer(consts, 'someBool'))).toBeTruthy();
     expect(evaluator.isFoldable(findVarInitializer(consts, 'one'))).toBeTruthy();
@@ -55,7 +55,7 @@ describe('Evaluator', () => {
   });
 
   it('should be able to fold expressions with foldable references', () => {
-    const expressions = program.getSourceFile('expressions.ts');
+    const expressions = program.getSourceFile('expressions.ts') !;
     symbols.define('someName', 'some-name');
     symbols.define('someBool', true);
     symbols.define('one', 1);
@@ -69,7 +69,7 @@ describe('Evaluator', () => {
   });
 
   it('should be able to evaluate literal expressions', () => {
-    const consts = program.getSourceFile('consts.ts');
+    const consts = program.getSourceFile('consts.ts') !;
     expect(evaluator.evaluateNode(findVarInitializer(consts, 'someName'))).toBe('some-name');
     expect(evaluator.evaluateNode(findVarInitializer(consts, 'someBool'))).toBe(true);
     expect(evaluator.evaluateNode(findVarInitializer(consts, 'one'))).toBe(1);
@@ -77,7 +77,7 @@ describe('Evaluator', () => {
   });
 
   it('should be able to evaluate expressions', () => {
-    const expressions = program.getSourceFile('expressions.ts');
+    const expressions = program.getSourceFile('expressions.ts') !;
     symbols.define('someName', 'some-name');
     symbols.define('someBool', true);
     symbols.define('one', 1);
@@ -124,7 +124,7 @@ describe('Evaluator', () => {
   });
 
   it('should report recursive references as symbolic', () => {
-    const expressions = program.getSourceFile('expressions.ts');
+    const expressions = program.getSourceFile('expressions.ts') !;
     expect(evaluator.evaluateNode(findVarInitializer(expressions, 'recursiveA')))
         .toEqual({__symbolic: 'reference', name: 'recursiveB'});
     expect(evaluator.evaluateNode(findVarInitializer(expressions, 'recursiveB')))
@@ -132,13 +132,13 @@ describe('Evaluator', () => {
   });
 
   it('should correctly handle special cases for CONST_EXPR', () => {
-    const const_expr = program.getSourceFile('const_expr.ts');
+    const const_expr = program.getSourceFile('const_expr.ts') !;
     expect(evaluator.evaluateNode(findVarInitializer(const_expr, 'bTrue'))).toEqual(true);
     expect(evaluator.evaluateNode(findVarInitializer(const_expr, 'bFalse'))).toEqual(false);
   });
 
   it('should resolve a forwardRef', () => {
-    const forwardRef = program.getSourceFile('forwardRef.ts');
+    const forwardRef = program.getSourceFile('forwardRef.ts') !;
     expect(evaluator.evaluateNode(findVarInitializer(forwardRef, 'bTrue'))).toEqual(true);
     expect(evaluator.evaluateNode(findVarInitializer(forwardRef, 'bFalse'))).toEqual(false);
   });
@@ -146,7 +146,7 @@ describe('Evaluator', () => {
   it('should return new expressions', () => {
     symbols.define('Value', {__symbolic: 'reference', module: './classes', name: 'Value'});
     evaluator = new Evaluator(symbols, new Map());
-    const newExpression = program.getSourceFile('newExpression.ts');
+    const newExpression = program.getSourceFile('newExpression.ts') !;
     expect(evaluator.evaluateNode(findVarInitializer(newExpression, 'someValue'))).toEqual({
       __symbolic: 'new',
       expression:
@@ -162,7 +162,7 @@ describe('Evaluator', () => {
   });
 
   it('should support referene to a declared module type', () => {
-    const declared = program.getSourceFile('declared.ts');
+    const declared = program.getSourceFile('declared.ts') !;
     const aDecl = findVar(declared, 'a') !;
     expect(evaluator.evaluateNode(aDecl.type !)).toEqual({
       __symbolic: 'select',
@@ -172,7 +172,7 @@ describe('Evaluator', () => {
   });
 
   it('should return errors for unsupported expressions', () => {
-    const errors = program.getSourceFile('errors.ts');
+    const errors = program.getSourceFile('errors.ts') !;
     const fDecl = findVar(errors, 'f') !;
     expect(evaluator.evaluateNode(fDecl.initializer !))
         .toEqual({__symbolic: 'error', message: 'Lambda not supported', line: 1, character: 12});
@@ -202,14 +202,14 @@ describe('Evaluator', () => {
   });
 
   it('should be able to fold an array spread', () => {
-    const expressions = program.getSourceFile('expressions.ts');
+    const expressions = program.getSourceFile('expressions.ts') !;
     symbols.define('arr', [1, 2, 3, 4]);
     const arrSpread = findVar(expressions, 'arrSpread') !;
     expect(evaluator.evaluateNode(arrSpread.initializer !)).toEqual([0, 1, 2, 3, 4, 5]);
   });
 
   it('should be able to produce a spread expression', () => {
-    const expressions = program.getSourceFile('expressions.ts');
+    const expressions = program.getSourceFile('expressions.ts') !;
     const arrSpreadRef = findVar(expressions, 'arrSpreadRef') !;
     expect(evaluator.evaluateNode(arrSpreadRef.initializer !)).toEqual([
       0, {__symbolic: 'spread', expression: {__symbolic: 'reference', name: 'arrImport'}}, 5
diff --git a/packages/compiler-cli/test/metadata/symbols_spec.ts b/packages/compiler-cli/test/metadata/symbols_spec.ts
index 9ec9041fc3..36b8157b41 100644
--- a/packages/compiler-cli/test/metadata/symbols_spec.ts
+++ b/packages/compiler-cli/test/metadata/symbols_spec.ts
@@ -43,8 +43,8 @@ describe('Symbols', () => {
     host = new Host(FILES, ['consts.ts', 'expressions.ts', 'imports.ts']);
     service = ts.createLanguageService(host);
     program = service.getProgram();
-    expressions = program.getSourceFile('expressions.ts');
-    imports = program.getSourceFile('imports.ts');
+    expressions = program.getSourceFile('expressions.ts') !;
+    imports = program.getSourceFile('imports.ts') !;
   });
 
   it('should not have syntax errors in the test sources', () => {
diff --git a/packages/compiler-cli/test/metadata/typescript.mocks.ts b/packages/compiler-cli/test/metadata/typescript.mocks.ts
index 517191ec07..93f7438cc9 100644
--- a/packages/compiler-cli/test/metadata/typescript.mocks.ts
+++ b/packages/compiler-cli/test/metadata/typescript.mocks.ts
@@ -104,6 +104,7 @@ export class MockIdentifier extends MockNode implements ts.Identifier {
   public text: string;
   public escapedText: ts.__String;
   // tslint:disable
+  public _declarationBrand: any;
   public _primaryExpressionBrand: any;
   public _memberExpressionBrand: any;
   public _leftHandSideExpressionBrand: any;
diff --git a/packages/compiler-cli/test/test_support.ts b/packages/compiler-cli/test/test_support.ts
index 35cf8661b7..19785a893e 100644
--- a/packages/compiler-cli/test/test_support.ts
+++ b/packages/compiler-cli/test/test_support.ts
@@ -85,6 +85,7 @@ export function setup(): TestSupport {
       'experimentalDecorators': true,
       'skipLibCheck': true,
       'strict': true,
+      'strictPropertyInitialization': false,
       'types': [],
       'outDir': path.resolve(basePath, 'built'),
       'rootDir': basePath,
diff --git a/packages/compiler-cli/test/transformers/lower_expressions_spec.ts b/packages/compiler-cli/test/transformers/lower_expressions_spec.ts
index 8866993519..4c429c2008 100644
--- a/packages/compiler-cli/test/transformers/lower_expressions_spec.ts
+++ b/packages/compiler-cli/test/transformers/lower_expressions_spec.ts
@@ -192,7 +192,7 @@ function convert(annotatedSource: string) {
 
   const program = ts.createProgram(
       [fileName], {module: ts.ModuleKind.CommonJS, target: ts.ScriptTarget.ES2017}, host);
-  const moduleSourceFile = program.getSourceFile(fileName);
+  const moduleSourceFile = program.getSourceFile(fileName) !;
   const transformers: ts.CustomTransformers = {
     before: [getExpressionLoweringTransformFactory(
         {
diff --git a/packages/compiler-cli/test/transformers/program_spec.ts b/packages/compiler-cli/test/transformers/program_spec.ts
index 89cdaefafd..dcfbad2035 100644
--- a/packages/compiler-cli/test/transformers/program_spec.ts
+++ b/packages/compiler-cli/test/transformers/program_spec.ts
@@ -446,45 +446,57 @@ describe('ng program', () => {
         {rootNames: [path.resolve(testSupport.basePath, 'src/index.ts')], options, host});
     program.emit();
 
+    const enum ShouldBe { Empty, EmptyExport, NoneEmpty }
     function assertGenFile(
-        fileName: string, checks: {originalFileName: string, shouldBeEmpty: boolean}) {
+        fileName: string, checks: {originalFileName: string, shouldBe: ShouldBe}) {
       const writeData = written.get(path.join(testSupport.basePath, fileName));
       expect(writeData).toBeTruthy();
       expect(writeData !.original !.some(
                  sf => sf.fileName === path.join(testSupport.basePath, checks.originalFileName)))
           .toBe(true);
-      if (checks.shouldBeEmpty) {
-        // The file should only contain comments (the preamble comment added by ngc).
-        expect(writeData !.data).toMatch(/^(\s*\/\*([^*]|\*[^/])*\*\/\s*)?$/);
-      } else {
-        expect(writeData !.data).not.toBe('');
+      switch (checks.shouldBe) {
+        case ShouldBe.Empty:
+          expect(writeData !.data).toMatch(/^(\s*\/\*([^*]|\*[^/])*\*\/\s*)?$/);
+          break;
+        case ShouldBe.EmptyExport:
+          expect(writeData !.data)
+              .toMatch(/^((\s*\/\*([^*]|\*[^/])*\*\/\s*)|(\s*export\s*{\s*}\s*;\s*)|())$/);
+          break;
+        case ShouldBe.NoneEmpty:
+          expect(writeData !.data).not.toBe('');
+          break;
       }
     }
 
     assertGenFile(
-        'built/src/util.ngfactory.js', {originalFileName: 'src/util.ts', shouldBeEmpty: true});
+        'built/src/util.ngfactory.js', {originalFileName: 'src/util.ts', shouldBe: ShouldBe.Empty});
     assertGenFile(
-        'built/src/util.ngfactory.d.ts', {originalFileName: 'src/util.ts', shouldBeEmpty: true});
+        'built/src/util.ngfactory.d.ts',
+        {originalFileName: 'src/util.ts', shouldBe: ShouldBe.EmptyExport});
     assertGenFile(
-        'built/src/util.ngsummary.js', {originalFileName: 'src/util.ts', shouldBeEmpty: true});
+        'built/src/util.ngsummary.js', {originalFileName: 'src/util.ts', shouldBe: ShouldBe.Empty});
     assertGenFile(
-        'built/src/util.ngsummary.d.ts', {originalFileName: 'src/util.ts', shouldBeEmpty: true});
+        'built/src/util.ngsummary.d.ts',
+        {originalFileName: 'src/util.ts', shouldBe: ShouldBe.EmptyExport});
     assertGenFile(
-        'built/src/util.ngsummary.json', {originalFileName: 'src/util.ts', shouldBeEmpty: false});
+        'built/src/util.ngsummary.json',
+        {originalFileName: 'src/util.ts', shouldBe: ShouldBe.NoneEmpty});
 
     // Note: we always fill non shim and shim style files as they might
     // be shared by component with and without ViewEncapsulation.
     assertGenFile(
-        'built/src/main.css.ngstyle.js', {originalFileName: 'src/main.ts', shouldBeEmpty: false});
+        'built/src/main.css.ngstyle.js',
+        {originalFileName: 'src/main.ts', shouldBe: ShouldBe.NoneEmpty});
     assertGenFile(
-        'built/src/main.css.ngstyle.d.ts', {originalFileName: 'src/main.ts', shouldBeEmpty: true});
+        'built/src/main.css.ngstyle.d.ts',
+        {originalFileName: 'src/main.ts', shouldBe: ShouldBe.EmptyExport});
     // Note: this file is not empty as we actually generated code for it
     assertGenFile(
         'built/src/main.css.shim.ngstyle.js',
-        {originalFileName: 'src/main.ts', shouldBeEmpty: false});
+        {originalFileName: 'src/main.ts', shouldBe: ShouldBe.NoneEmpty});
     assertGenFile(
         'built/src/main.css.shim.ngstyle.d.ts',
-        {originalFileName: 'src/main.ts', shouldBeEmpty: true});
+        {originalFileName: 'src/main.ts', shouldBe: ShouldBe.EmptyExport});
   });
 
   it('should not emit /// references in .d.ts files', () => {
diff --git a/packages/compiler/test/aot/compiler_spec.ts b/packages/compiler/test/aot/compiler_spec.ts
index d8aea934c0..bbb01f14f4 100644
--- a/packages/compiler/test/aot/compiler_spec.ts
+++ b/packages/compiler/test/aot/compiler_spec.ts
@@ -279,7 +279,7 @@ describe('compiler (unbundled Angular)', () => {
       };
       compile([FILES, angularFiles], {
         postCompile: program => {
-          const factorySource = program.getSourceFile('/app/app.ngfactory.ts');
+          const factorySource = program.getSourceFile('/app/app.ngfactory.ts') !;
           expect(factorySource.text).not.toContain('\'/app/app.ngfactory\'');
         }
       });
diff --git a/packages/core/src/render3/interfaces/definition.ts b/packages/core/src/render3/interfaces/definition.ts
index 9050baec7e..8ebac49f8b 100644
--- a/packages/core/src/render3/interfaces/definition.ts
+++ b/packages/core/src/render3/interfaces/definition.ts
@@ -218,7 +218,7 @@ export interface DirectiveDefArgs<T> {
   /**
    * Factory method used to create an instance of directive.
    */
-  factory: () => T | [T];
+  factory: () => T | ({0: T} & any[]); /* trying to say T | [T, ...any] */
 
   /**
    * Static attributes to set on host element.
diff --git a/packages/core/src/sanitization/html_sanitizer.ts b/packages/core/src/sanitization/html_sanitizer.ts
index 13f5a353f3..dc49a6d073 100644
--- a/packages/core/src/sanitization/html_sanitizer.ts
+++ b/packages/core/src/sanitization/html_sanitizer.ts
@@ -256,7 +256,9 @@ export function _sanitizeHtml(defaultDoc: any, unsafeHtmlInput: string): string
 }
 
 function getTemplateContent(el: Node): Node|null {
-  return 'content' in el && isTemplateElement(el) ? el.content : null;
+  return 'content' in (el as any /** Microsoft/TypeScript#21517 */) && isTemplateElement(el) ?
+      el.content :
+      null;
 }
 function isTemplateElement(el: Node): el is HTMLTemplateElement {
   return el.nodeType === Node.ELEMENT_NODE && el.nodeName === 'TEMPLATE';
diff --git a/packages/core/testing/src/render3.ts b/packages/core/testing/src/render3.ts
index 17478d8a38..14f172bd0e 100644
--- a/packages/core/testing/src/render3.ts
+++ b/packages/core/testing/src/render3.ts
@@ -41,7 +41,10 @@ export function withBody<T>(html: string, blockFn: T): T {
     let returnValue: any = undefined;
     if (typeof blockFn === 'function') {
       document.body.innerHTML = html;
-      let blockReturn = blockFn();
+      // TODO(i): I'm not sure why a cast is required here but otherwise I get
+      //   TS2349: Cannot invoke an expression whose type lacks a call signature. Type 'never' has
+      //   no compatible call signatures.
+      let blockReturn = (blockFn as any)();
       if (blockReturn instanceof Promise) {
         blockReturn = blockReturn.then(done, done.fail);
       } else {
diff --git a/packages/language-service/src/ts_plugin.ts b/packages/language-service/src/ts_plugin.ts
index 81a92964c8..e88d9941c1 100644
--- a/packages/language-service/src/ts_plugin.ts
+++ b/packages/language-service/src/ts_plugin.ts
@@ -72,7 +72,13 @@ function angularOnlyFilter(ls: ts.LanguageService): ts.LanguageService {
     dispose: () => ls.dispose(),
     getApplicableRefactors: (fileName, positionOrRaneg) => <ts.ApplicableRefactorInfo[]>[],
     getEditsForRefactor: (fileName, formatOptions, positionOrRange, refactorName, actionName) =>
-                             undefined
+                             undefined,
+    getDefinitionAndBoundSpan: (fileName: string, position: number):
+                                   ts.DefinitionInfoAndBoundSpan =>
+                                       ({definitions: [], textSpan: {start: 0, length: 0}}),
+    getCombinedCodeFix:
+        (scope: ts.CombinedCodeFixScope, fixId: {}, formatOptions: ts.FormatCodeSettings):
+            ts.CombinedCodeActions => ({changes: [], commands: undefined})
   };
 }
 
@@ -172,7 +178,11 @@ export function create(info: any /* ts.server.PluginCreateInfo */): ts.LanguageS
       getProgram: () => ls.getProgram(),
       dispose: () => ls.dispose(),
       getApplicableRefactors: tryFilenameOneCall(ls.getApplicableRefactors),
-      getEditsForRefactor: tryFilenameFourCall(ls.getEditsForRefactor)
+      getEditsForRefactor: tryFilenameFourCall(ls.getEditsForRefactor),
+      getDefinitionAndBoundSpan: tryFilenameOneCall(ls.getDefinitionAndBoundSpan),
+      getCombinedCodeFix:
+          (scope: ts.CombinedCodeFixScope, fixId: {}, formatOptions: ts.FormatCodeSettings) =>
+              tryCall(undefined, () => ls.getCombinedCodeFix(scope, fixId, formatOptions))
     };
   }
 
@@ -300,7 +310,9 @@ export function create(info: any /* ts.server.PluginCreateInfo */): ts.LanguageS
       const ours = ls.getDiagnostics(fileName);
       if (ours && ours.length) {
         const file = oldLS.getProgram().getSourceFile(fileName);
-        base.push.apply(base, ours.map(d => diagnosticToDiagnostic(d, file)));
+        if (file) {
+          base.push.apply(base, ours.map(d => diagnosticToDiagnostic(d, file)));
+        }
       }
     });
 
diff --git a/packages/language-service/src/typescript_host.ts b/packages/language-service/src/typescript_host.ts
index 8a076f6f69..1673f3a4b5 100644
--- a/packages/language-service/src/typescript_host.ts
+++ b/packages/language-service/src/typescript_host.ts
@@ -212,7 +212,7 @@ export class TypeScriptServiceHost implements LanguageServiceHost {
     return result;
   }
 
-  getSourceFile(fileName: string): ts.SourceFile {
+  getSourceFile(fileName: string): ts.SourceFile|undefined {
     return this.tsService.getProgram().getSourceFile(fileName);
   }
 
@@ -339,10 +339,12 @@ export class TypeScriptServiceHost implements LanguageServiceHost {
         let [declaration, decorator] = this.getTemplateClassDeclFromNode(node);
         if (declaration && declaration.name) {
           const sourceFile = this.getSourceFile(fileName);
-          return this.getSourceFromDeclaration(
-              fileName, version, this.stringOf(node) || '', shrink(spanOf(node)),
-              this.reflector.getStaticSymbol(sourceFile.fileName, declaration.name.text),
-              declaration, node, sourceFile);
+          if (sourceFile) {
+            return this.getSourceFromDeclaration(
+                fileName, version, this.stringOf(node) || '', shrink(spanOf(node)),
+                this.reflector.getStaticSymbol(sourceFile.fileName, declaration.name.text),
+                declaration, node, sourceFile);
+          }
         }
         break;
     }
diff --git a/packages/platform-browser/test/dom/events/event_manager_spec.ts b/packages/platform-browser/test/dom/events/event_manager_spec.ts
index 5f67243643..185bf98822 100644
--- a/packages/platform-browser/test/dom/events/event_manager_spec.ts
+++ b/packages/platform-browser/test/dom/events/event_manager_spec.ts
@@ -106,7 +106,7 @@ import {el} from '../../../testing/src/browser_util';
       };
       const manager = new EventManager([domEventPlugin], new FakeNgZone());
 
-      let remover = null;
+      let remover: any = null;
       Zone.root.run(() => { remover = manager.addEventListener(element, 'click', handler); });
       getDOM().dispatchEvent(element, dispatchedEvent);
       expect(receivedEvent).toBe(dispatchedEvent);
@@ -136,8 +136,8 @@ import {el} from '../../../testing/src/browser_util';
       };
       const manager = new EventManager([domEventPlugin], new FakeNgZone());
 
-      let remover1 = null;
-      let remover2 = null;
+      let remover1: any = null;
+      let remover2: any = null;
       Zone.root.run(() => { remover1 = manager.addEventListener(element, 'click', handler1); });
       Zone.root.fork({name: 'test'}).run(() => {
         remover2 = manager.addEventListener(element, 'click', handler2);
@@ -172,8 +172,8 @@ import {el} from '../../../testing/src/browser_util';
       };
       const manager = new EventManager([domEventPlugin], new FakeNgZone());
 
-      let remover1 = null;
-      let remover2 = null;
+      let remover1: any = null;
+      let remover2: any = null;
       Zone.root.run(() => { remover1 = manager.addEventListener(element, 'click', handler1); });
       Zone.root.fork({name: 'test'}).run(() => {
         remover2 = manager.addEventListener(element, 'click', handler2);
@@ -239,8 +239,8 @@ import {el} from '../../../testing/src/browser_util';
       };
       const manager = new EventManager([domEventPlugin], new FakeNgZone());
 
-      let remover1 = null;
-      let remover2 = null;
+      let remover1: any = null;
+      let remover2: any = null;
       Zone.root.run(() => { remover1 = manager.addEventListener(element, 'click', handler); });
       Zone.root.fork({name: 'test'}).run(() => {
         remover2 = manager.addEventListener(element, 'click', handler);
@@ -274,8 +274,8 @@ import {el} from '../../../testing/src/browser_util';
       };
       const manager = new EventManager([domEventPlugin], new FakeNgZone());
 
-      let remover1 = null;
-      let remover2 = null;
+      let remover1: any = null;
+      let remover2: any = null;
       // handler1 is added in root zone
       Zone.root.run(() => { remover1 = manager.addEventListener(element, 'click', handler1); });
       // handler2 is added in 'angular' zone
diff --git a/packages/service-worker/worker/testing/fetch.ts b/packages/service-worker/worker/testing/fetch.ts
index 3a55f84a6a..5176e46801 100644
--- a/packages/service-worker/worker/testing/fetch.ts
+++ b/packages/service-worker/worker/testing/fetch.ts
@@ -92,10 +92,12 @@ export class MockRequest extends MockBody implements Request {
   readonly referrer: string = '';
   readonly referrerPolicy: ReferrerPolicy = 'no-referrer';
   readonly type: RequestType = '';
+  readonly signal: AbortSignal = null as any;
+
   url: string;
 
   constructor(input: string|Request, init: RequestInit = {}) {
-    super(init !== undefined ? init.body || null : null);
+    super(init !== undefined ? (init.body as(string | null)) || null : null);
     if (typeof input !== 'string') {
       throw 'Not implemented';
     }
diff --git a/scripts/ci/offline_compiler_test.sh b/scripts/ci/offline_compiler_test.sh
index f0be24490f..830c076fe0 100755
--- a/scripts/ci/offline_compiler_test.sh
+++ b/scripts/ci/offline_compiler_test.sh
@@ -8,7 +8,7 @@ set -u -e -o pipefail
 # packages, then install them from the resulting .tgz files later.
 ANGULAR_PKGS=$(npm pack dist/packages-dist/{common,forms,core,compiler,compiler-cli,platform-{browser,server},platform-browser-dynamic,router,http,animations} | awk "{ printf \"$PWD/\"; print }")
 
-TYPESCRIPT_2_4=typescript@2.4.x
+TYPESCRIPT_VERSION=typescript@2.7.2
 PKGS=(
   reflect-metadata@0.1.8
   zone.js@0.8.7
@@ -33,7 +33,7 @@ cp -v package.json $TMP
 (
   cd $TMP
   set -ex -o pipefail
-  npm install ${PKGS[*]} $TYPESCRIPT_2_4
+  npm install ${PKGS[*]} $TYPESCRIPT_VERSION
   npm install ${ANGULAR_PKGS[*]}
 
   ./node_modules/.bin/tsc --version
diff --git a/tools/postinstall-patches.js b/tools/postinstall-patches.js
index ba5509510e..e9c844ef65 100644
--- a/tools/postinstall-patches.js
+++ b/tools/postinstall-patches.js
@@ -1,7 +1,16 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
 const {set, cd, sed} = require('shelljs');
 const path = require('path');
+const log = console.log;
 
-console.log('===== about to run the postinstall.js script     =====');
+log('===== about to run the postinstall.js script     =====');
 // fail on first error
 set('-e');
 // print commands as being executed
@@ -12,8 +21,9 @@ cd(path.join(__dirname, '../'));
 // https://github.com/ReactiveX/rxjs/pull/3302
 // make node_modules/rxjs compilable with Typescript 2.7
 // remove when we update to rxjs v6
-console.log('\n# patch: reactivex/rxjs#3302 make node_modules/rxjs compilable with Typescript 2.7')
-sed('-i', "('response' in xhr)", "('response' in (xhr as any))", "node_modules/rxjs/src/observable/dom/AjaxObservable.ts")
+log('\n# patch: reactivex/rxjs#3302 make node_modules/rxjs compilable with Typescript 2.7');
+sed('-i', '(\'response\' in xhr)', '(\'response\' in (xhr as any))',
+    'node_modules/rxjs/src/observable/dom/AjaxObservable.ts');
 
 
-console.log('===== finished running the postinstall.js script =====');
+log('===== finished running the postinstall.js script =====');
diff --git a/tools/public_api_guard/platform-webworker/platform-webworker.d.ts b/tools/public_api_guard/platform-webworker/platform-webworker.d.ts
index 15c158de9a..76a2717c52 100644
--- a/tools/public_api_guard/platform-webworker/platform-webworker.d.ts
+++ b/tools/public_api_guard/platform-webworker/platform-webworker.d.ts
@@ -85,15 +85,21 @@ export declare const VERSION: Version;
 export declare const WORKER_APP_LOCATION_PROVIDERS: ({
     provide: typeof PlatformLocation;
     useClass: typeof WebWorkerPlatformLocation;
+    useFactory?: undefined;
+    multi?: undefined;
+    deps?: undefined;
 } | {
     provide: InjectionToken<(() => void)[]>;
-    useFactory: (platformLocation: WebWorkerPlatformLocation, zone: NgZone) => () => Promise<boolean>;
+    useFactory: typeof appInitFnFactory;
     multi: boolean;
     deps: (typeof NgZone | typeof PlatformLocation)[];
+    useClass?: undefined;
 } | {
     provide: InjectionToken<Promise<any>>;
-    useFactory: (platformLocation: WebWorkerPlatformLocation) => Promise<any>;
+    useFactory: typeof locationInitialized;
     deps: (typeof PlatformLocation)[];
+    useClass?: undefined;
+    multi?: undefined;
 })[];
 
 /** @experimental */
diff --git a/tools/public_api_guard/router/upgrade.d.ts b/tools/public_api_guard/router/upgrade.d.ts
index 2fd7d62113..5f51dd10ca 100644
--- a/tools/public_api_guard/router/upgrade.d.ts
+++ b/tools/public_api_guard/router/upgrade.d.ts
@@ -2,7 +2,7 @@
 export declare const RouterUpgradeInitializer: {
     provide: InjectionToken<((compRef: ComponentRef<any>) => void)[]>;
     multi: boolean;
-    useFactory: (ngUpgrade: UpgradeModule) => () => void;
+    useFactory: typeof locationSyncBootstrapListener;
     deps: (typeof UpgradeModule)[];
 };
 
diff --git a/yarn.lock b/yarn.lock
index 506c26b20e..00e0e00531 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6202,9 +6202,9 @@ rx-lite@^3.1.2:
   version "3.1.2"
   resolved "https://registry.yarnpkg.com/rx-lite/-/rx-lite-3.1.2.tgz#19ce502ca572665f3b647b10939f97fd1615f102"
 
-rxjs@5.5.5:
-  version "5.5.5"
-  resolved "https://registry.yarnpkg.com/rxjs/-/rxjs-5.5.5.tgz#e164f11d38eaf29f56f08c3447f74ff02dd84e97"
+rxjs@5.5.6:
+  version "5.5.6"
+  resolved "https://registry.yarnpkg.com/rxjs/-/rxjs-5.5.6.tgz#e31fb96d6fd2ff1fd84bcea8ae9c02d007179c02"
   dependencies:
     symbol-observable "1.0.1"
 
@@ -7204,9 +7204,9 @@ typedarray@^0.0.6:
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
 
-typescript@2.6.x:
-  version "2.6.2"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.6.2.tgz#3c5b6fd7f6de0914269027f03c0946758f7673a4"
+typescript@2.7.x:
+  version "2.7.2"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.7.2.tgz#2d615a1ef4aee4f574425cdff7026edf81919836"
 
 uglify-js@1.2.6, uglify-js@~1.2.5:
   version "1.2.6"