#3167: segmentation fault
-----------------------------+----------------------------------------------
Reporter: guest | Owner:
Type: bug | Status: new
Priority: normal | Component: Runtime System
Version: 6.10.2 | Severity: major
Keywords: | Testcase:
Os: Unknown/Multiple | Architecture: Unknown/Multiple
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In a program I have experienced a segmentation fault;
not only that but also:
{{{
* tpp.c:63: __pthread_tpp_change_priority: Assertion `new_prio == -1 ||
(new_prio >= _sched_fifo_min_prio && new_prio <= __sched_fifo_max_prio)'
failed.'
* internal error: removeThreadFromQueue: not found
(GHC version 6.8.2 for i386_unknown_linux)
Please report this as a GHC bug:
http://www.haskell.org/ghc/reportabug
}}}
I have managed to write a program that reproduces the problem, it is in
attachment.
1. Compile with: ''$ghc --make -threaded -O2 main.hs''
2. Execute with: ''$./main +RTS -A128M -s -c -N4 -RTS 5000000 500''
This should produce a segmentation fault (or one of the previous errors).
I strongly suspect that the cause is an uncaught stack overflow.
* Executing the code with only 1 threads, there are no more problems.
* Increasing the thread stack size (''-k1M''), there are no more
problems.
If the problem is really an uncaught stack overflow, I'm rather sure that
a more simple test can be written, to reproduce the problem.
I'm on Linux Debian Etch i386; GHC 6.8.2.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3167>
GHC <http://www.haskell.org/ghc/>
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