#15892: Segmentation fault with ByteString and -O ----------------------------------+-------------------------------------- Reporter: akio | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.6.3 Component: Compiler | Version: 8.6.2 Resolution: | Keywords: Operating System: Linux | Architecture: x86_64 (amd64) Type of failure: Runtime crash | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | ----------------------------------+-------------------------------------- Changes (by osa1): * cc: osa1, simonmar (added) Comment: This seems to be related with the GC. I realized two things: - If I run with debug runtime I get this error: {{{ segfault: internal error: Evaluated a CAF (0x851768) that was GC'd! (GHC version 8.7.20181113 for x86_64_unknown_linux) Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug zsh: abort (core dumped) ./segfault +RTS > /dev/null }}} - If I play around with GC params sometimes this programs can run for much longer. E.g. on my system `+RTS -A1G` or `+RTS -G5` seem to make the problem disappear. Could this be related with the recent SRT work? CCing simonmar. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15892#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler