For higher kinds, instance declarations need quantification in the context
$ rm -f DerivingError.o DerivingError.hi; ghc --make DerivingError.hs
[1 of 1] Compiling DerivingError ( DerivingError.hs, DerivingError.o )
/var/folders/C0/C0SledGV2RaxbU+8ZLDnVU+++TI/-Tmp-//ghc27223_0/ghc27223_0.s:6080:0:
FATAL:Symbol _XxG_srt already defined.Trac metadata
| Trac field | Value |
|---|---|
| Version | 6.8.3 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | MacOS X |
| Architecture |
Edited by Simon Peyton Jones