#14350: Infinite loop when typechecking incorrect implementation (GHC HEAD only) -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: (none) Type: bug | Status: closed Priority: high | Milestone: 8.4.1 Component: Compiler (Type | Version: 8.3 checker) | Resolution: fixed | Keywords: TypeInType Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: | typecheck/should_fail/T14350 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by simonpj): * status: new => closed * testcase: => typecheck/should_fail/T14350 * resolution: => fixed Comment: Fixed by {{{ In 74cd1be0/ghc: Don't deeply expand insolubles Trac #13450 went bananas if we expand insoluble constraints. Better just to leave them un-expanded. I'm not sure in detail about why it goes so badly wrong; but regardless, the less we mess around with insoluble contraints the better the error messages will be. }}} Sorry I mis-typed the trac ticket in the commit. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14350#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler