And here's the existing bug report: https://secure.phabricator.com/T6050 Excerpts from Edward Z. Yang's message of 2015-08-05 12:53:47 -0700:

OK, I've resolved the problem; the problem was that I had copypasted an updated commit message into the Phabricator description field which contained special fields, which caused problems for Phabricator.

Edward

Excerpts from Edward Z. Yang's message of 2015-08-05 11:06:59 -0700:

...

Hello friends,

I too am having Arcanist problems (my libphutil and arcanist are at the latest head). Here's my error:

[ezyang@hs01 ghc-quick]$ arc diff HEAD~ You have untracked files in this working copy.

Working copy: /home/hs01/ezyang/ghc-quick/

Untracked changes in working copy: (To ignore these changes, add them to ".git/info/exclude".) testsuite/tests/driver/T9938 testsuite/tests/driver/T9938B testsuite/tests/driver/dynamicToo/dynamicToo001/d testsuite/tests/driver/dynamicToo/dynamicToo001/s testsuite/tests/driver/dynamicToo/dynamicToo005/A005.dyn_o-boot

Ignore these untracked files and continue? [y/N] y

Exception Field "testPlan" occurs twice in commit message! (Run with `--trace` for a full exception trace.)

Here is the commit message in question:

commit 80ef08619c315e35e439e50724afc5d3b3203895 Author: Edward Z. Yang Date: Fri Jul 24 15:13:49 2015 -0700

Unify hsig and hs-boot; add preliminary "hs-boot" merging.

This patch drops the file level distinction between hs-boot and hsig; we figure out which one we are compiling based on whether or not there is a corresponding hs file lying around.

To make the "import A" syntax continue to work for bare hs-boot files, we also introduce hs-boot merging, which takes an A.hi-boot and converts it to an A.hi when there is no A.hs file in scope. This will be generalized in Backpack to merge multiple A.hi files together; which means we can jettison the "load multiple interface files" functionality.

This works automatically for --make, but for one-shot compilation we need a new mode: ghc --merge-requirements A will generate an A.hi/A.o from a local A.hi-boot file; Backpack will extend this mechanism further.

Has Haddock submodule update to deal with change in msHsFilePath behavior.

- This commit drops support for the hsig extension. Can we support it? It's annoying because the finder code is written with the assumption that where there's an hs-boot file, there's always an hs file too. To support hsig, you'd have to probe two locations. Easier to just not support it.

- #10333 affects us, modifying an hs-boot still doesn't trigger recomp.

- See compiler/main/Finder.hs: this diff is very skeevy, but it seems to work.

- This code cunningly doesn't drop hs-boot files from the "drop hs-boot files" module graph, if they don't have a corresponding hs file. I have no idea if this actually is useful.

Signed-off-by: Edward Z. Yang

Test Plan: validate

Reviewers: simonpj, austin, bgamari, spinda

Subscribers: thomie

Differential Revision: https://phabricator.haskell.org/D1098

It doesn't work even if I delete "Test Plan".

Edward