[ python-Bugs-971213 ] another threads+readline+signals nasty

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Bugs item #971213, was opened at 2004-06-11 08:30
Message generated for change (Comment added) made by nnorwitz
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Category: Python Interpreter Core
Group: None
Status: Open
>Resolution: Works For Me
Priority: 7
Submitted By: Anthony Baxter (anthonybaxter)
>Assigned to: Anthony Baxter (anthonybaxter)
Summary: another threads+readline+signals nasty

Initial Comment:
python -c "import time, readline, thread;
thread.start_new_thread(raw_input, ()); time.sleep(2)"

Segfaults on ^C<return>

Fails on Linux, freebsd.

On linux (FC - using kernel 2.6.1, glibc 2.3.3, gcc-3.3.3)

(gdb) where
#0  0x002627a2 in _dl_sysinfo_int80 () from
/lib/ld-linux.so.2
#1  0x008172b1 in ___newselect_nocancel () from
/lib/tls/libc.so.6
#2  0x0011280b in time_sleep (self=0x0, args=0xb7fe17ac)
    at Modules/timemodule.c:815

on FreeBSD 5.2.1-RC, a different error.

Fatal error 'longjmp()ing between thread contexts is
undefined by POSIX 1003.1' at line 72 in file
/usr/src/lib/libc_r/uthread/uthread_jmp.c (errno = 2)
Abort (core dumped)


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>Comment By: Neal Norwitz (nnorwitz)
Date: 2006-08-18 20:09

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This doesn't crash for me any more.  I remember there was
another fix for socket timeouts and Ctrl-C.  Maybe that
fixed this too?  Anthony, can you reproduce this?

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Comment By: Michael Hudson (mwh)
Date: 2005-10-03 04:13

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I can't, on OS X or debian.  

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Comment By: Neal Norwitz (nnorwitz)
Date: 2005-10-02 21:12

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I can reproduce with cvs head (gentoo linux/amd64).

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Comment By: Michael Hudson (mwh)
Date: 2005-04-07 02:03

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I think this is fixed now, as in I can't reproduce it with CVS 
HEAD. Not sure why!  I can think of a few fixes that might be responsible.

It still messes the terminal up, though.

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Comment By: Michael Hudson (mwh)
Date: 2004-08-07 14:41

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Bah, this still segfaults with CVS head.

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Comment By: Michael Hudson (mwh)
Date: 2004-06-21 03:45

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Can you try the patch that's *now* in 960406?  It seems to help 
for me (but I really would rather not think too hard about this!).

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Comment By: Michal Pasternak (mpasternak)
Date: 2004-06-11 08:43

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readline used on FreeBSD was readline-4.3pl5; everything else: gcc 3.3.3, 
ncurses, libc were standard from 5.2.1.

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Comment By: Anthony Baxter (anthonybaxter)
Date: 2004-06-11 08:39

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The patch in #960406 doesn't help here.

The FC test system also has readline-4.3, if it helps, as
does the FreeBSD box. It apparently doesn't crash on OSX.



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Comment By: Michael Hudson (mwh)
Date: 2004-06-11 08:38

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Hmm.  Doesn't crash on OS X.  Messes the terminal up good and 
proper, though.

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