GHC internal error when missing -XFlexibleContexts with generics
See test case GEq2 (currently on the ghc-generics branch, soon to be merged). When missing -XFlexibleContexts, the compiler panics with
GHC internal error: `Main.$gdmgeq' is not in scope during type checking, but it passed the renamerWhen -XFlexibleContexts is added, the error disappears.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.1 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
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| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |