#11077: ghc panic: ieName failed pattern match -------------------------------------+------------------------------------- Reporter: woehr | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.10.2 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- My custom prelude module is producing the following panic in ghc: {{{ <no location info>: ghc: panic! (the 'impossible' happened) (GHC version 7.10.2 for x86_64-unknown-linux): ieName failed pattern match! Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug }}} The module is as follows: {{{#!hs module Prelude ( module X , tshow ) where import BasePrelude as X import Data.Text as X (Text, pack, unpack) tshow :: Show a => a -> Text tshow = pack . show }}} In my cabal file I depend on base-noprelude and base-prelude and use the above as my custom Prelude module. The panic is triggered by ```tshow```. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11077 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler