Re: [GHC] #14036: GHCi HEAD segfaults upon startup with a prof build

#14036: GHCi HEAD segfaults upon startup with a prof build -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: (none) Type: bug | Status: patch Priority: highest | Milestone: 8.4.1 Component: Compiler | Version: 8.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: GHCi crash | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D3983 Wiki Page: | -------------------------------------+------------------------------------- Comment (by David Feuer ): In [changeset:"60a3f11ff4b7e239a273498812fd9d31f6775726/ghc" 60a3f11f/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="60a3f11ff4b7e239a273498812fd9d31f6775726" Fix pointer tagging mistake f9c6d53fe997f1c560cda6f346f4b201711df37c led to #14036. The problem turned out to be rather simple: the `obj` pointer was being tagged using `obj + arity`. Because this is C, that's done with *pointer arithmetic*, which is not at all what we want. Add appropriate casts. Reviewers: austin, bgamari, erikd, simonmar Reviewed By: bgamari Subscribers: rwbarton, thomie GHC Trac Issues: #14036 Differential Revision: https://phabricator.haskell.org/D3983 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14036#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler