Typescript version 2.1.0-dev.20161025 has require regression

[johnnyreilly]

Hi,

I'm a maintainer of ts-loader for Webpack. We've just noticed that out simpleDependency test has started failing consistently on Windows and Linux

TypeScript Version: 2.0.3 / nightly (2.1.0-dev.20161025)

Code

Take a look here for the PR on which I noticed the issue: TypeStrong/ts-loader#337

And look here for the Karma test that demostrates the issue: https://github.com/TypeStrong/ts-loader/tree/master/test/execution-tests/simpleDependency

Expected behavior:

Test passes with TypeScript@latest (as with TS 1.6 - 2.0)

Actual behavior:

Test fails with TypeScript@latest (despite passing for other versions of TS)

[mhegazy]

In https://github.com/TypeStrong/ts-loader/blob/master/test/execution-tests/simpleDependency/tsconfig.json#L4 the files list is empty. this means no files are consumed by the compiler.

In past versions the compiler silently finished with a non-error return code (as there is no work to be done). This has been confusing to users who wounder why output files were not generated (see #11621 and #11156).

In #11743 we made this an error, so that users are aware that the compilation they ran was a no op.

[johnnyreilly]

Ah - I see. Thanks. I'll fix up our test pack to cater for that. I've just realised that this creates a small problem for ts-loader with regards our instance test. i.e. ts-loader was relying on the noop to not error. Now it will; I think we already have an issue raised around this:

TypeStrong/ts-loader#268

and possibly related:

TypeStrong/ts-loader#267