GHC panic on TypeApplications + TemplateHaskell
This fails
$ ghci -XTemplateHaskell -ignore-dot-ghci
GHCi, version 8.0.1: http://www.haskell.org/ghc/ :? for help
Prelude> import Control.Lens
Prelude Control.Lens> data A = B { _int :: Int }
Prelude Control.Lens> pure @Q []; makeLenses ''A
ghc: panic! (the 'impossible' happened)
(GHC version 8.0.1 for x86_64-unknown-linux):
tcMonoExpr _
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
Prelude Control.Lens>sorry, don't have time for more detail
Trac metadata
| Trac field | Value |
|---|---|
| Version | 8.0.1 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |