[emitDecoratorMetadata] TypeError: Cannot read property 'kind' of undefined

[jmlopez-rod]

The following code crashes the compiler:

// File tmp.ts
class Injectable {

  constructor(...args: any[]) {
    console.log('args:', args);
  }

  static inject(clazz: any, injectables: string[]): void {
    console.log('clazz:', clazz, 'injectables:', injectables);
  }

}


function Inject(args: string[]): Function {
  return (target: any) => {
    Injectable.inject(target, args);
  };
}



@Inject(['a', 'b'])
class A extends Injectable {

  constructor(...injectables) {
    super(...injectables);
  }

}

// Without the decorator
// Injectable.inject(A, ['a', 'b']);

export default A;

Results:

jmlopez in ~/testing$ tsc -v
Version 1.8.10
jmlopez in ~/testing$ tsc tmp.ts --experimentalDecorators --emitDecoratorMetadata
/Users/jmlopez/testing/node_modules/typescript/lib/tsc.js:33078
                throw e;
                ^

TypeError: Cannot read property 'kind' of undefined
    at emitSerializedParameterTypesOfNode (/Users/jmlopez/testing/node_modules/typescript/lib/tsc.js:30799:54)
    at emitSerializedTypeMetadata (/Users/jmlopez/testing/node_modules/typescript/lib/tsc.js:30844:25)
    at emitDecoratorsOfConstructor (/Users/jmlopez/testing/node_modules/typescript/lib/tsc.js:30537:17)
    at emitDecoratorsOfClass (/Users/jmlopez/testing/node_modules/typescript/lib/tsc.js:30514:17)
    at emitClassLikeDeclarationBelowES6 (/Users/jmlopez/testing/node_modules/typescript/lib/tsc.js:30474:17)
    at emitClassLikeDeclaration (/Users/jmlopez/testing/node_modules/typescript/lib/tsc.js:30323:21)
    at emitClassDeclaration (/Users/jmlopez/testing/node_modules/typescript/lib/tsc.js:30319:24)
    at emitJavaScriptWorker (/Users/jmlopez/testing/node_modules/typescript/lib/tsc.js:32383:32)
    at emitNodeWithoutSourceMap (/Users/jmlopez/testing/node_modules/typescript/lib/tsc.js:32189:21)
    at emitNodeWithSourceMap (/Users/jmlopez/testing/node_modules/typescript/lib/tsc.js:32183:21)

It works fine without the --emitDecoratorMetadata. I have also tested in Version 1.9.0-dev.20160217 and I obtain the same error.

[mhegazy]

@Andy-MS can you take a look.

[jmlopez-rod]

Here is a more compact example that makes the compiler crash

function inject(clazz: any, injectables: (string | any)[]): void {
  console.log('here...');
}


function Inject(args: string[]): Function {
  return (target: any) => {
    inject(target, args);
  };
}


@Inject(['a', 'b'])
class A {

  constructor(...args) {
    inject(this, args);
  }

}

export default A;

Again, this happens only when using the --emitDecoratorMetadata flag. Another way to fix this is to add the type to args, that is, if we declare the class like this:

@Inject(['a', 'b'])
class A {

  constructor(...args: any[]) {
    inject(this, args);
  }

}