$ cabal install blaze-builder

Resolving dependencies...

Configuring blaze-builder-0.3.0.1...

Building blaze-builder-0.3.0.1...

Preprocessing library blaze-builder-0.3.0.1...

...

[10 of 13] Compiling Blaze.ByteString.Builder.HTTP ( Blaze/ByteString/Builder/HTTP.hs, dist/build/Blaze/ByteString/Builder/HTTP.o )

[11 of 13] Compiling Blaze.ByteString.Builder.Int ( Blaze/ByteString/Builder/Int.hs, dist/build/Blaze/ByteString/Builder/Int.o )

ghc: panic! (the 'impossible' happened)

(GHC version 7.3.20111007 for x86_64-unknown-linux):

Simplifier ticks exhausted

When trying UnfoldingDone a_s9oE{v} [lid]

To increase the limit, use -fsimpl-tick-factor=N (default 100)

If you need to do this, let GHC HQ know, and what factor you needed

To see detailed counts use -ddump-simpl-stats

Total ticks: 5123

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