fix: prevent strictNullChecks support until #15432 is fixed (#15434)

integration/hello_world__closure/tsconfig.json

@@ -7,7 +7,8 @@
   "compilerOptions": {
     "module": "es2015",
     "moduleResolution": "node",
-    "strictNullChecks": true,
+    // TODO(i): strictNullChecks should turned on but are temporarily disabled due to #15432
+    "strictNullChecks": false,
     "target": "es6",
     "noImplicitAny": false,
     "sourceMap": false,

integration/typings_test_ts21/tsconfig.json

@@ -9,7 +9,8 @@
     "target": "es5",
     "lib": ["es5", "dom", "es2015.collection", "es2015.iterable", "es2015.promise"],
     "types": [],
-    "strictNullChecks": true
+    // TODO(i): strictNullChecks should turned on but are temporarily disabled due to #15432
+    "strictNullChecks": false
   },
   "files": [
     "include-all.ts",

integration/typings_test_ts22/tsconfig.json

@@ -15,7 +15,8 @@
       "es2015.promise"
     ],
     "types": [],
-    "strictNullChecks": true
+    // TODO(i): strictNullChecks should turned on but are temporarily disabled due to #15432
+    "strictNullChecks": false
   },
   "files": [
     "include-all.ts",

packages/core/public_api.ts

@@ -14,3 +14,9 @@
 export * from './src/core';
 
 // This file only reexports content of the `src` folder. Keep it that way.
+
+// This is a hack to prevent people from turning on strictNullChecks. See #15432
+export declare interface ɵStrictNullChecksNotSupported {
+  dontUseStrictNullChecksWithAngularYetSeeIssue15432: string|null;
+  [key: string]: string;
+}

packages/platform-server/integrationtest/tsconfig.json

@@ -7,7 +7,8 @@
   "compilerOptions": {
     "module": "es2015",
     "moduleResolution": "node",
-    "strictNullChecks": true,
+    // TODO(i): strictNullChecks should turned on but are temporarily disabled due to #15432
+    "strictNullChecks": false,
     "target": "es6",
     "noImplicitAny": false,
     "sourceMap": false,