Unreg build fails when haddocking dph-seq

The unregisterised HEAD build is failing thus:

"inplace/bin/ghc-cabal" haddock dist-install libraries/dph/dph-seq --with-haddock=/64playpen/buildbot/x86_64-linux-head-unreg/build/inplace/bin/haddock --with-ghc=/64playpen/buildbot/x86_64-linux-head-unreg/build/inplace/bin/ghc-stage2 --hyperlink-source 
Running Haddock for dph-seq-0.4.0...
Preprocessing library dph-seq-0.4.0...
Running hscolour for dph-seq-0.4.0...
Warning: The documentation for the following packages are not installed. No
links will be generated to these packages: ffi-1.0, rts-1.0
haddock: panic! (the 'impossible' happened)
  (GHC version 6.13.20091112 for x86_64-unknown-linux):
	This compiler was built without a native code generator
    Use -fvia-C instead

Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

Presumably because dph-seq needs to do some dynamic compilation for its annotations, so Haddock tells it to use -fasm, but there's no native code generator.

Not clear whether this is a Haddock problem or something we need to fix in the GHC API (probably both).

Trac metadata

Trac field	Value
Version	6.10.4
Type	Bug
TypeOfFailure	OtherFailure
Priority	high
Resolution	Unresolved
Component	Compiler
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