#12007: Panic when loading file with nested pattern synonyms into ghci -------------------------------------+------------------------------------- Reporter: MikeIzbicki | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.1 Resolution: | Keywords: | PatternSynonyms Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): I have learned a bit more. * Here is a smaller test case {{{ pattern A a1 = a1 pattern B a1 = A a1 }}} * The bug is that `kindRep` falls over. I'm pretty sure it's the call from `typePrimRep`. * The code spat out by `CorePrep` is absolutely fine. * The crash comes when the bytecode codegen gets hold of it. I wish I knew ''which'' call to `typePrimRep` in the bytecode generator was causing the crash. Maybe someone can try stack-tracing (with our new lightweight `CallStack` stuff) to narrow it down? Simon -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12007#comment:10 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler