add tests for #26873

[durka]

I think we can close#26873 with these tests.

[rust-highfive]

r? @brson

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[alexcrichton]

Looks like there are some tidy errors (license related), but other than that lgtm

[durka]

Bah, 2/2 so far on forgetting to copy the license into tests.

[durka]

Fixed, I think.

[alexcrichton]

@bors: r+ 88ed7b7

[durka]

That test failure makes no sense.

[durka]

@bors retry

[durka]

@alexcrichton could you restart the test? I think it started in the middle of a force-push or something.

[alexcrichton]

This is in the queue, it just hasn't hit bors yet

[durka]

Oh, got it.

[Manishearth]

http://buildbot.rust-lang.org/builders/auto-linux-musl-64-opt/builds/2590/steps/test/logs/stdio

[mitaa]

I did some printf debugging:
Rust is for some reason looking for the module in the directory /home/mitaa/dev/rust instead of /home/mitaa/dev/rust/src/test/run-pass when running the pretty test

I guess // ignore-pretty should be acceptable for now (like the few other tests with mod directives)

[durka]

Seems like a bug in the prettifier. Anyway, workaround added.

[alexcrichton]

@bors: r+ 3da609f

[bors]

⌛ Testing commit 3da609f with merge fec739b...

[bors]

☀️ Test successful - auto-linux-32-nopt-t, auto-linux-32-opt, auto-linux-64-debug-opt, auto-linux-64-nopt-t, auto-linux-64-opt, auto-linux-64-x-android-t, auto-linux-cross-opt, auto-linux-musl-64-opt, auto-mac-32-opt, auto-mac-64-nopt-t, auto-mac-64-opt, auto-win-gnu-32-nopt-t, auto-win-gnu-32-opt, auto-win-gnu-64-nopt-t, auto-win-gnu-64-opt, auto-win-msvc-32-opt, auto-win-msvc-64-opt