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I have so far been unable to reproduce this in a small example, but in my larger examples code compiled with profiling enabled (and -fprof-auto) often crashes on an exception. Here's a gdb session illustrating the problem:

(gdb) run
Starting program: /Users/edsko/wt/distributed-process/network-transport-tcp/dist/build/TestTCP/TestTCP +RTS -xc
Reading symbols for shared libraries ++............................. done
Running "InvalidAddress": *** Exception (reporting due to +RTS -xc): (THUNK_2_0), stack trace: 
  Network.Transport.TCP.Mock.Socket.getAddrInfo,
  called from Network.Transport.TCP.Internal.forkServer,
  called from Network.Transport.TCP.createTransportExposeInternals,
  called from Network.Transport.TCP.createTransport,
  called from Main.testInvalidAddress.\,
  called from Main.testInvalidAddress,
  called from Main.main,
  called from Main.CAF

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: 13 at address: 0x0000000000000000
0x0000000100398c06 in fprintCCS_stderr ()
(gdb) bt
#0  0x0000000100398c06 in fprintCCS_stderr ()
#1  0x00000001003c1e3c in stg_raisezh ()
Previous frame inner to this frame (gdb could not unwind past this frame)

with ghc 7.4.1; with ghc 7.6.1, it is

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: 13 at address: 0x0000000000000000
0x000000010037a676 in fprintCCS_stderr ()
(gdb) bt
#0  0x000000010037a676 in fprintCCS_stderr ()
#1  0x00000001003a3e27 in stg_raisezh ()
Previous frame inner to this frame (gdb could not unwind past this frame)

Without gdb, it looks something like

# dist/build/TestTCP/TestTCP +RTS -xc
Running "InvalidAddress": *** Exception (reporting due to +RTS -xc): (THUNK_2_0), stack trace: 
  Network.Transport.TCP.Mock.Socket.getAddrInfo,
  called from Network.Transport.TCP.Internal.forkServer,
  called from Network.Transport.TCP.createTransportExposeInternals,
  called from Network.Transport.TCP.createTransport,
  called from Main.testInvalidAddress.\,
  called from Main.testInvalidAddress,
  called from Main.main,
  called from Main.CAF
*** Exception (reporting due to +RTS -xc): (BLACKHOLE), stack trace: 
  Network.Transport.TCP.Mock.Socket.getAddrInfo,
  called from Network.Transport.TCP.Internal.forkServer,
  called from Network.Transport.TCP.createTransportExposeInternals,
  called from Network.Transport.TCP.createTransport,
  called from Main.testInvalidAddress.\,
  called from Main.testInvalidAddress,
  called from Main.main,
  called from Main.CAF
*** Exception (reporting due to +RTS -xc): (THUNK_2_0), stack trace: 
  Network.Transport.TCP.Mock.Socket.getAddrInfo,
  called from Network.Transport.TCP.Internal.forkServer,
  called from Network.Transport.TCP.createTransportExposeInternals,
  called from Network.Transport.TCP.createTransport,
  called from Main.testInvalidAddress.\,
  called from Main.testInvalidAddress,
  called from Main.main,
  called from Main.CAF
*** Exception (reporting due to +RTS -xc): (THUNK_STATIC), stack trace: 
  Main.main
*** Exception (reporting due to +RTS -xc): (THUNK_2_0), stack trace: 
  Network.Transport.TCP.Mock.Socket.getAddrInfo,
  called from Network.Transport.TCP.Internal.forkServer,
  called from Network.Transport.TCP.createTransportExposeInternals,
  called from Network.Transport.TCP.createTransport,
  called from Main.testInvalidAddress.\,
  called from Main.testInvalidAddress,
  called from Main.main,
  called from Main.CAF
Segmentation fault: 11

Note that the place of the Segmentation fault is the place where normally the exception would be printed.

Trac metadata

Trac field	Value
Version	7.6.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture