#12954: unexpected uncaught segmentation error in arbitrary precision Integer calculations with modestly large numbers ----------------------------------+-------------------------------------- Reporter: geraint | Owner: Type: bug | Status: new Priority: high | Milestone: 8.2.1 Component: GHCi | Version: 8.0.1 Resolution: | Keywords: Operating System: MacOS X | Architecture: x86_64 (amd64) Type of failure: Runtime crash | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | ----------------------------------+-------------------------------------- Changes (by bgamari): * cc: hvr (added) * priority: normal => high * milestone: => 8.2.1 Comment: Alright, here's a backtrace, {{{ ghc-mini:~ bgamari$ sudo lldb -- /Users/bgamari/ghc-8.0.1/lib/ghc-8.0.1/bin/ghc -B/Users/bgamari/ghc-8.0.1/lib/ghc-8.0.1 --interactive Password: (lldb) target create "/Users/bgamari/ghc-8.0.1/lib/ghc-8.0.1/bin/ghc" run Current executable set to '/Users/bgamari/ghc-8.0.1/lib/ghc-8.0.1/bin/ghc' (x86_64). (lldb) settings set -- target.run-args "-B/Users/bgamari/ghc-8.0.1/lib/ghc-8.0.1" "--interactive" (lldb) run Process 99769 launched: '/Users/bgamari/ghc-8.0.1/lib/ghc-8.0.1/bin/ghc' (x86_64) GHCi, version 8.0.1: http://www.haskell.org/ghc/ :? for help Prelude> 2^(10^7) :: Integer Process 99769 stopped * thread #2: tid = 0x6cc7f82, 0x0000000108169cfd libHSinteger- gmp-1.0.0.1-ghc8.0.1.dylib`__gmpn_mul + 3437, stop reason = EXC_BAD_ACCESS (code=1, address=0x70000d43ad38) frame #0: 0x0000000108169cfd libHSinteger- gmp-1.0.0.1-ghc8.0.1.dylib`__gmpn_mul + 3437 libHSinteger-gmp-1.0.0.1-ghc8.0.1.dylib`__gmpn_mul: -> 0x108169cfd <+3437>: callq 0x10818d6a0 ; __gmpn_toom63_mul 0x108169d02 <+3442>: jmp 0x10816975f ; <+1999> 0x108169d07 <+3447>: movq -0x118(%rbp), %rcx 0x108169d0e <+3454>: movq -0x158(%rbp), %rdx (lldb) bt * thread #2: tid = 0x6cc7f82, 0x0000000108169cfd libHSinteger- gmp-1.0.0.1-ghc8.0.1.dylib`__gmpn_mul + 3437, stop reason = EXC_BAD_ACCESS (code=1, address=0x70000d43ad38) * frame #0: 0x0000000108169cfd libHSinteger- gmp-1.0.0.1-ghc8.0.1.dylib`__gmpn_mul + 3437 frame #1: 0x0000000108169df5 libHSinteger- gmp-1.0.0.1-ghc8.0.1.dylib`__gmpn_mul + 3685 frame #2: 0x00000001081701aa libHSinteger- gmp-1.0.0.1-ghc8.0.1.dylib`__gmpn_tdiv_qr + 2986 frame #3: 0x0000000108145742 libHSinteger- gmp-1.0.0.1-ghc8.0.1.dylib`crUO_info + 50 }}} hvr, do you have any idea what is going on here? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12954#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler