#8067: -XDefaultSignatures panic in type error diagnostic -------------------------------------+------------------------------------- Reporter: exFalso | Owner: Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler | Version: 7.6.3 Resolution: duplicate | Keywords: defaultsignatures Operating System: Linux | panic Type of failure: Compile-time | Architecture: x86_64 (amd64) crash | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: -------------------------------------+------------------------------------- Changes (by monoidal): * status: new => closed * resolution: => duplicate Comment: Thanks for the report; it is a duplicate of #8055 and related bugs, fixed in HEAD. In fact you do not need default signatures: `fun = lift :: () -> () -> m a` is enough to crash 7.6. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8067#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler