the "impossible happened" while building regex-posix-0.94.4 with GHC 7
Here's the output...
Configuring regex-posix-0.94.4... Preprocessing library regex-posix-0.94.4... Building regex-posix-0.94.4... [1 of 6] Compiling Text.Regex.Posix.Wrap ( dist/build/Text/Regex/Posix/Wrap.hs, dist/build/Text/Regex/Posix/Wrap.o ) SpecConstr
Function `lvl_s2xM{v} [lid]'
has three call patterns, but the limit is 0
Use -fspec-constr-count=n to set the bound
Use -dppr-debug to see specialisations
ghc: panic! (the 'impossible' happened)
(GHC version 7.0.0.20100924 for x86_64-unknown-linux):
initC: srt_lbl
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
By the way: I got lots of the "SpecConstr" warnings while building other packages.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.0.1 RC1 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |