Re: [GHC] #10174: AArch64 : ghc-stage2 segfaults compiling libraries/parallel

#10174: AArch64 : ghc-stage2 segfaults compiling libraries/parallel ----------------------------------------+---------------------------------- Reporter: erikd | Owner: Type: bug | Status: new Priority: normal | Milestone: 7.12.1 Component: Compiler | Version: 7.11 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: aarch64 Type of failure: Building GHC failed | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: ----------------------------------------+---------------------------------- Comment (by erikd): Running the above `ghc-stage2` command under gdb and grabbing the backtrace results in: {{{ Program received signal SIGSEGV, Segmentation fault. 0x00290108d000a388 in ?? () (gdb) bt X0 0x00290108d000a388 in ?? () X1 0x0000000002b7b940 in StgRun (f=<optimized out>, f@entry=0x2b8a788 , basereg=<optimized out>) at rts/StgCRun.c:81 X2 0x0000000002b7e114 in schedule (initialCapability=initialCapability@entry=0x3975a40 <MainCapability>, task=task@entry=0x39a7470) at rts/Schedule.c:463 X3 0x0000000002b7ef5c in scheduleWaitThread (tso=0x7fb7c0b388, ret=ret@entry=0x0, pcap=pcap@entry=0x7ffffff4d8) at rts/Schedule.c:2380 X4 0x0000000002b75698 in rts_evalLazyIO (cap=cap@entry=0x7ffffff4d8, p=p@entry=0x2f79bc0 , ret=ret@entry=0x0) at rts/RtsAPI.c:500 X5 0x0000000002b80428 in hs_main (argc=49, argv=0x7ffffff688, main_closure=0x2f79bc0 , rts_config=...) at rts/RtsMain.c:64 X6 0x000000000042ea9c in main () }}} which suggests something going awry in `StgRun`. In addition, running the above command under gdb showed that 3 extra threads were being started whereas, if `ghc-stage2` is replaced with `ghc- stage1` and run, only a single thread (the initial host thread) is started. This on the other hand suggests a threading problem. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10174#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler