#9732: Pattern synonyms and unboxed values -------------------------------------+------------------------------------- Reporter: monoidal | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.3 Resolution: | Keywords: Operating System: | Architecture: Unknown/Multiple Unknown/Multiple | Difficulty: Unknown Type of failure: Compile- | Blocked By: time crash | Related Tickets: Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Description changed by monoidal: Old description:
It's possible to declare a toplevel unboxed value with a pattern synonym, which causes a panic:
{{{ {-# LANGUAGE PatternSynonyms, MagicHash #-} pattern P = 0# }}}
(compare with error on `x = 0#`).
New description: It's possible to declare a toplevel unboxed value with a pattern synonym, which causes a panic: {{{ {-# LANGUAGE PatternSynonyms, MagicHash #-} pattern P = 0# }}} (compare with error on `x = 0#`). `pattern P <- 0#` seems to work fine. -- -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9732#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler