unification error with ghc head
Ben Gamari is reporting unification errors when he tries to build llvm-general using current GHC HEAD (7.7) llvm-general currently builds with 7.4 and 7.6, so unless theres substantial changes to how higher rank types are checked, this sounds like it may be a type checker bug in HEAD.
https://github.com/bscarlet/llvm-general/issues/54 is relevant bug report, i'll include a copy of the information in a comment on this ticket
Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.7 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler (Type checker) |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |