Two GHC linkers running in parallel on Windows goes wrong

Running the attached script, I get one of three error messages (non-deterministically):

C:\ghc\ghc-7.4.1\lib/../mingw/bin/windres.exe: can't open file
`main.exe.manifest': No such file or directory

DeleteFile "main.exe.manifest": does not exist (The system cannot find the file specified.)

main.exe.manifest: openFile: permission denied (Permission denied)

The script attempts to run two linkers simultaneously. I have replicated this bug on two Windows machines, on both GHC 7.2.2 and 7.4.1.

Trac metadata

Trac field	Value
Version	7.4.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
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Two GHC linkers running in parallel on Windows goes wrong