#11972: Weak pointers can cause segfault -------------------------------------+------------------------------------- Reporter: ryantrinkle | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.1-rc3 Keywords: | Operating System: Unknown/Multiple Architecture: x86_64 | Type of failure: Runtime crash (amd64) | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- The attached program segfaults. It appears to be nondeterministic, but on my machine, it occurs at least 95% of the time. Some small changes, such as removing the bang pattern, cause the segfault to become much less likely. {{{ weakPointerSegfault: internal error: ASSERTION FAILED: file rts/sm/GCAux.c, line 44 (GHC version 8.0.0.20160411 for x86_64_unknown_linux) Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug Aborted (core dumped) }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11972 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler