#13916: Optimizations create run time seg faults -------------------------------------+------------------------------------- Reporter: newthin | Owner: (none) Type: bug | Status: new Priority: highest | Milestone: 8.2.2 Component: Compiler | Version: 8.0.2 (CodeGen) | Resolution: | Keywords: optimization Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: Runtime crash | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by bgamari): I think I see: `foldlM_loop_a45q` places a `C(S)` demand on its second argument and called with this argument being `retry#`. `retry#` has a divergent demand result (namely `Demand.botRes`). This is likely how the analyzer concludes that `takeEnv` will diverge. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13916#comment:18 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler