windows failure in testsuite

Simon Peyton Jones simonpj at
Wed Jun 10 22:27:36 UTC 2015


Thanks.  Happily, it has started working again now. I changed nothing!  Mysterious.


From: Thomas Miedema [mailto:thomasmiedema at]
Sent: 09 June 2015 12:51
To: Simon Peyton Jones
Cc: ghc-devs at
Subject: Re: windows failure in testsuite

Hi Simon,

this doesn't look like a problem with the testsuite driver. The testsuite driver indeed calls 'diff', but has been doing so for years. Nothing changed there. I just ran the testsuite on Windows with msys2 to double check, and didn't get any framework errors either.

Something changed in your Windows setup maybe?


On Mon, Jun 8, 2015 at 11:52 PM, Simon Peyton Jones <simonpj at<mailto:simonpj at>> wrote:
Windows and testsuite folk: The testsuite framework is crashing on my 32-bit Windows machine, with the error below.  Happens when the stderr output differs from expected.
I know that there have been recent changes in the testsuite stuff.  Could you fix please?
=====> T4254(normal) 1587 of 4522 [2, 15, 0]
cd ./indexed-types/should_fail &&  "C:/code/HEAD/inplace/bin/ghc-stage2.exe" -c T4254.hs -fforce-recomp -dcore-lint -dcmm-lint -dno-debug-output -no-user-package-db -rtsopts -fno-warn-tabs -fno-ghci-history   > T4254.comp.stderr 2>&1
Actual stderr output differs from expected:
'diff' is not recognized as an internal or external command,
operable program or batch file.

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