#11158: Combine exprIsTrivial and cpe_ExprIsTrivial -------------------------------------+------------------------------------- Reporter: simonpj | Owner: Type: task | Status: patch Priority: highest | Milestone: 8.2.1 Component: Compiler | Version: 7.10.2 Resolution: | Keywords: newcomer Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D1656 Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): It would be really really good to know why the tiny difference between the functions causes a seg fault. Why doesn't Core Lint (on the output of `CorePrep`) catch the seg-fault? How to find it? Since the failing tests use the GHC API, that suggests that the code for GHC itself gets messed up, which is a pain -- GHC is a very big test-case! One idea: spit out a `pprTrace` whenever `cpe_exprIsTrivial` does something different to what `exprIsTrivial` would have. I bet it doesn't happen much. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11158#comment:11 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler