Windows build broken (again)

Simon Peyton Jones simonpj at
Fri Oct 3 15:29:31 UTC 2014

Perhaps, yes, it is Python 3. I don't know.  Could someone revert to make it work again, please?


From: ghc-devs [mailto:ghc-devs-bounces at] On Behalf Of Simon Peyton Jones
Sent: 02 October 2014 21:40
To: ghc-devs at
Subject: Windows build broken (again)

Sigh.  The testsuite fails utterly on Windows, with thousands of identical errors

=====> tc012(normal) 3039 of 4088 [1, 2677, 88]

cd .\typecheck\should_compile && 'C:/code/HEAD/inplace/bin/ghc-stage2.exe' -fforce-recomp -dcore-lint -dcmm-lint -dno-debug-output -no-user-package-db -rtsopts -fno-ghci-history -c tc012.hs   -fno-warn-incomplete-patterns >tc012.comp.stderr 2>&1

sh: line 0: cd: .typecheckshould_compile: No such file or directory

Compile failed (status 256) errors were:

*** unexpected failure for tc012(normal)
Presumably this is some kind of Windows escape-character problem.  But it has worked fine for years, so what is going on?
It's very tiresome dealing with Windows breakage so frequently.   A few regression test failures, maybe, but outright breakage is very bad.

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