TypeScript Version: 2.1.4

Code

module MyModule {

  export function inject(target: any, key: string): void {}

  export class Leg {}

  export class Person {
    @inject leftLeg: Leg;
  }

}

Compiled with:
tsc --experimentalDecorators --emitDecoratorMetadata -target es5 app.ts

Expected behavior:
The design:type metadata inserted uses type Object instead of the actual type

__decorate([
    inject,
    __metadata("design:type", Object)
], Person.prototype, "leftArm", void 0);

Actual behavior:
The design:type metadata should be set to the correct type (Leg in this case)

__decorate([
    inject,
    __metadata("design:type", Leg)
], Person.prototype, "leftArm", void 0);

Note: This was working in previous version (we were on 1.8.10) and broke after upgrading to 2.1.4