Clean build ASSERT failure

Simon Peyton Jones simonpj at
Fri Feb 28 21:00:40 UTC 2014

I'm seeing this assertion failure when using the stage1 compiler (built with -DDEBUG) to compile the stage2 compiler.  Is anyone else seeing this?

ghc-stage1.exe: panic! (the 'impossible' happened)
  (GHC version 7.9.20140227 for i386-unknown-mingw32):
          ASSERT failed!
    file compiler\basicTypes\Demand.lhs line 445

Please report this as a GHC bug:

compiler/ recipe for target 'compiler/stage2/build/ParserCore.o' failed
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