GHC 6.8.1 panics with lookupRecBndr
When building the CGS module in the dimensional library GHC 6.8.1 panics with the following message:
ghc-6.8.1: panic! (the 'impossible' happened)
(GHC version 6.8.1 for powerpc-apple-darwin):
lookupRecBndr $dSucc{v a202} [lid]The library in general and CGS module in particular is full of type hackery. If it is of any help Succ is defined in Numeric.NumType.
The same error occurs when compiling on x86/Windows so it doesn't seem to be platform specific.
Steps to reproduce:
- Download dimensional 0.7.1.
- Uncomment the Numeric.Units.Dimensional.CGS module in dimensional.cabal.
- Use the cabal process to configure and build.
This doesn't happen in GHC 6.6.1.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 6.8.1 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | Multiple |
| Architecture | Multiple |