#9130: Segmentation fault in ThreadPaused.c:223 when compiled with -O -----------------------------------+---------------------------------- Reporter: twi | Owner: simonmar Type: bug | Status: new Priority: high | Milestone: Component: Runtime System | Version: 7.8.2 Resolution: | Keywords: Operating System: Linux | Architecture: x86_64 (amd64) Type of failure: Runtime crash | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: -----------------------------------+---------------------------------- Comment (by ezyang): I cannot reproduce on HEAD (7d958ce323e3433c9e996e1a240a5741bfcfc341). {{{ [ezyang@hs01 ghc-validate]$ cabal install --with-ghc=/home/hs01/ezyang /ghc-validate/inplace/bin/ghc-stage2 async Resolving dependencies... Configuring stm-2.4.3... Building stm-2.4.3... Preprocessing library stm-2.4.3... [ 1 of 10] Compiling Control.Sequential.STM ( Control/Sequential/STM.hs, dist/build/Control/Sequential/STM.o ) [ 2 of 10] Compiling Control.Concurrent.STM.TBQueue ( Control/Concurrent/STM/TBQueue.hs, dist/build/Control/Concurrent/STM/TBQueue.o ) [ 3 of 10] Compiling Control.Concurrent.STM.TQueue ( Control/Concurrent/STM/TQueue.hs, dist/build/Control/Concurrent/STM/TQueue.o ) [ 4 of 10] Compiling Control.Concurrent.STM.TChan ( Control/Concurrent/STM/TChan.hs, dist/build/Control/Concurrent/STM/TChan.o ) [ 5 of 10] Compiling Control.Concurrent.STM.TMVar ( Control/Concurrent/STM/TMVar.hs, dist/build/Control/Concurrent/STM/TMVar.o ) [ 6 of 10] Compiling Control.Concurrent.STM.TVar ( Control/Concurrent/STM/TVar.hs, dist/build/Control/Concurrent/STM/TVar.o ) [ 7 of 10] Compiling Control.Concurrent.STM.TArray ( Control/Concurrent/STM/TArray.hs, dist/build/Control/Concurrent/STM/TArray.o ) [ 8 of 10] Compiling Control.Monad.STM ( Control/Monad/STM.hs, dist/build/Control/Monad/STM.o ) [ 9 of 10] Compiling Control.Concurrent.STM ( Control/Concurrent/STM.hs, dist/build/Control/Concurrent/STM.o ) [10 of 10] Compiling Control.Concurrent.STM.TSem ( Control/Concurrent/STM/TSem.hs, dist/build/Control/Concurrent/STM/TSem.o ) In-place registering stm-2.4.3... Installing library in /home/u1/ezyang/.cabal/lib/x86_64-linux-ghc-7.9.20140520/stm-2.4.3 Registering stm-2.4.3... Installed stm-2.4.3 Configuring async-2.0.1.5... Building async-2.0.1.5... Preprocessing library async-2.0.1.5... [1 of 1] Compiling Control.Concurrent.Async ( Control/Concurrent/Async.hs, dist/build/Control/Concurrent/Async.o ) In-place registering async-2.0.1.5... Installing library in /home/u1/ezyang/.cabal/lib/x86_64-linux-ghc-7.9.20140520/async-2.0.1.5 Registering async-2.0.1.5... Installed async-2.0.1.5 [ezyang@hs01 ghc-validate]$ vim Tests.hs ld/Control/Concurrent/STM/TArray.o ) [ 8 of 10] Compiling Control.Monad.STM ( Control/Monad/STM.hs, dist/build/Control/Monad/STM.o ) [ 9 of 10] Compiling Control.Concurrent.STM ( Control/Concurrent/STM.hs, dist/build/Control/Concurrent/STM.o ) [10 of 10] Compiling Control.Concurrent.STM.TSem ( Control/Concurrent/STM/TSem.hs, dist/build/Control/Concurrent/STM/TSem.o ) In-place registering stm-2.4.3... Installing library in /home/u1/ezyang/.cabal/lib/x86_64-linux-ghc-7.9.20140520/stm-2.4.3 Registering stm-2.4.3... Installed stm-2.4.3 Configuring async-2.0.1.5... Building async-2.0.1.5... Preprocessing library async-2.0.1.5... [1 of 1] Compiling Control.Concurrent.Async ( Control/Concurrent/Async.hs, dist/build/Control/Concurrent/Async.o ) In-place registering async-2.0.1.5... Installing library in /home/u1/ezyang/.cabal/lib/x86_64-linux-ghc-7.9.20140520/async-2.0.1.5 Registering async-2.0.1.5... Installed async-2.0.1.5 [ezyang@hs01 ghc-validate]$ vim Tests.hs [ezyang@hs01 ghc-validate]$ inplace/bin/ghc-stage2 --make -fforce-recomp -O Tests [1 of 1] Compiling Main ( Tests.hs, Tests.o ) Linking Tests ... [ezyang@hs01 ghc-validate]$ ./Tests [ezyang@hs01 ghc-validate]$ valgrind ./Tests ==24993== Memcheck, a memory error detector ==24993== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al. ==24993== Using Valgrind-3.9.0 and LibVEX; rerun with -h for copyright info ==24993== Command: ./Tests ==24993== ==24993== ==24993== HEAP SUMMARY: ==24993== in use at exit: 4,108 bytes in 2 blocks ==24993== total heap usage: 51 allocs, 49 frees, 64,682 bytes allocated ==24993== ==24993== LEAK SUMMARY: ==24993== definitely lost: 0 bytes in 0 blocks ==24993== indirectly lost: 0 bytes in 0 blocks ==24993== possibly lost: 0 bytes in 0 blocks ==24993== still reachable: 4,108 bytes in 2 blocks ==24993== suppressed: 0 bytes in 0 blocks ==24993== Rerun with --leak-check=full to see details of leaked memory ==24993== ==24993== For counts of detected and suppressed errors, rerun with: -v ==24993== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 1 from 1) }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9130#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler