ngc can now validate metadata before emitting to verify it doesn't contain an error symbol that will result in a runtime error if it is used by the StaticReflector. To enable this add the section, "angularCompilerOptions": { "strictMetadataEmit": true } to the top level of the tsconfig.json file passed to ngc. Enabled metadata validation for packages that are intended to be used statically.
How to run the examples locally
$ cp -r ./modules/playground ./dist/all/ $ ./node_modules/.bin/tsc -p modules --emitDecoratorMetadata -w $ gulp serve $ open http://localhost:8000/all/playground/src/hello_world/index.html?bundles=false