#7836: "Invalid object in processHeapClosureForDead" when profiling with -hb -------------------------------------+------------------------------------- Reporter: hyperthunk | Owner: (none) Type: bug | Status: patch Priority: normal | Milestone: Component: Profiling | Version: 8.5 Resolution: | Keywords: profiling Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: Runtime crash | Test Case: Blocked By: | Blocking: Related Tickets: #15063, #15087, | Differential Rev(s): Phab:D4928 #15165 | Wiki Page: | -------------------------------------+------------------------------------- Comment (by Ömer Sinan Ağacan ): In [changeset:"2625f1310edeff62eb3876cc6efbe105a80fe4ad/ghc" 2625f131/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="2625f1310edeff62eb3876cc6efbe105a80fe4ad" Fix processHeapClosureForDead CONSTR_NOCAF case CONSTR_NOCAF was introduced with 55d535da10d as a replacement for CONSTR_STATIC and CONSTR_NOCAF_STATIC, however, as explained in Note [static constructors], we copy CONSTR_NOCAFs (which can also be seen in evacuate) during GC, and they can become dead, like other CONSTR_X_Ys. processHeapClosureForDead is updated to reflect this. Test Plan: Validates on x86_64. Existing failures on i386. Reviewers: simonmar, bgamari, erikd Reviewed By: simonmar, bgamari Subscribers: rwbarton, thomie, carter GHC Trac Issues: #7836, #15063, #15087, #15165 Differential Revision: https://phabricator.haskell.org/D4928 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/7836#comment:30 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler