#13433: Segmentation faults in profiled way -------------------------------------+------------------------------------- Reporter: bgamari | Owner: (none) Type: bug | Status: new Priority: highest | Milestone: 8.2.1 Component: Compiler | Version: 8.1 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- It seems that profiling has regressed sometime between GHC 8.0 and 8.2. A few times since September I have noticed that profiled programs (in particular, GHC itself built with profiling enabled) seem to segmentation fault. This most recent case was produced by building commit 6ebfbdfb64cb8bb5c2ddaf2ad3ad350755c5eb2b with the following in `build.mk`, {{{ BuildFlavour = prof define add_mods_flag = $(foreach mod,$(2),$(eval $(basename $(mod))_HC_OPTS += $(1))) endef $(call add_mods_flag,-fprof-auto,$(wildcard compiler/typecheck/*.hs)) STRIP_CMD = : }}} and using the resulting stage2 compiler to bootstrap the same commit. Eventually the build will fail with a segmentation fault. Unfortunately it seems the crash isn't entirely reproducible. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13433 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler