#11681: ghc panic with TypeError -------------------------------------+------------------------------------- Reporter: inaki | Owner: Type: bug | Status: new Priority: normal | Milestone: 8.0.1 Component: Compiler (Type | Version: 8.0.1-rc2 checker) | Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple crash | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by bgamari): * failure: None/Unknown => Compile-time crash * version: 7.10.3 => 8.0.1-rc2 * component: Compiler => Compiler (Type checker) * milestone: => 8.0.1 Comment: What GHC version were you attempting to compile with? I don't believe it could have been 7.10.3 given that `TypeError` was only introduced in 8.0.1. Unfortunately, I'm having trouble reproducing this with any of the 8.0.1 release candidates. In all cases I get, {{{#!hs $ ghc Test.hs [1 of 1] Compiling Main ( Test.hs, Test.o ) Test.hs:8:42: error: • Expected kind ‘ErrorMessage’, but ‘"B"’ has kind ‘Symbol’ • In the second argument of ‘:<>:’, namely ‘"B"’ In the first argument of ‘TypeError’, namely ‘Text "A" :<>: "B"’ In the instance declaration for ‘C t’ }}} which appears to be the correct error. There have been a number of similar tickets which have been recently closed (e.g. #11563) with, [changeset:"b565830dda0994d5d67617039db3310f81e831c8/ghc" b565830d/ghc]. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11681#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler