ghci 6.10.4 and 6.10.1 crash with a big list

[joaoraf]

A have a haskell program with a big list of brazillian cities which crash ghci 6.10.4 with the following message (the same error occurred with 6.10.1):

Prelude Data.ListTrie?.Patricia.Map Data.ListTrie?.Base.Map> :l MakeMunicipios?.hs [1 of 1] Compiling MakeMunicipios? ( MakeMunicipios?.hs, interpreted ) ghc: panic! (the 'impossible' happened)

(GHC version 6.10.4 for i386-unknown-linux):

linkBCO: >= 64k insns in BCO

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

[joaoraf]

Module which crashes ghci

[Bart Massey]

Confirmed. This has been around since GHC 6.8 at least, and fails with other big lists also.

I'm not sure I agree the severity is "major", but I agree that it should be fixed.

[simonpj]

This almost certainly a dup of #780, which has been fixed recently. Try with the HEAD. If it fails, re-open the bug, but I'll close it meanwhile.

Simon