Re: [gentoo-user] python - *** glibc detected ***

[Nicolai Beuermann]

OK I've reemerged python and ran python-updater.
Problems remain the same although the script works until it stops and gives 
the error messages from above.

The script is a slighty modified (In/Outputs) version of the one that comes 
with ecasound documentation:
#!/usr/bin/env python

"""
1 Setup ECI to read audio from file, apply a 100Hz lowpass filter, and send it 
to the soundcard (/dev/dsp). 
2 Every second, check the current position. If the stream has been running for 
over 15 seconds, exit immediately. Also, every second, increase the lowpass 
filter's cutoff frequency by 500Hz. 
3 Stop the stream (if not already finished) and disconnect the chainsetup. 
Print chain operator status info. 
"""
import time
from pyeca import *
    
cutoff_inc = 500.0

e = ECA_CONTROL_INTERFACE()
e.command("cs-add pass_jack")
e.command("c-add chain01")
e.command("ai-add jack_auto,xine")
e.command("ao-add jack_auto,MONITOR")
e.command("cop-add -efl:100")
e.command("cop-select 1")
e.command("copp-select 1")
e.command("cs-connect")
e.command("start")
while True:
    time.sleep(True)
    e.command("engine-status")
    if e.last_string() != "running": break
    e.command("get-position")
    curpos = e.last_float()
    if curpos > 15: break
    e.command("copp-get")
    next_cutoff = cutoff_inc + e.last_float()
    e.command_float_arg("copp-set", next_cutoff)
e.command("stop")
e.command("cs-disconnect")
e.command("cop-status")
print "Chain operator status: ", e.last_string()

On 12.04.2008 02:24:09, Volker Armin Hemmann wrote:
> On Donnerstag, 10. April 2008, Nicolai Beuermann wrote:
> > Hello list,
> > a few days ago my creative urge forced me to learn python. As a first
> > step I wanted to control ecasound by script.
> > What a pity that it doesn't work.
> >
> > kernel:
> > It's a 64bit applepro with  Linux 2.6.22-sabayon #16 SMP PREEMPT Thu Dec
> > 27 19:33:05 CET 2007 x86_64 Intel(R) Xeon(R) CPU 5130 @ 2.00GHz
> > GenuineIntel GNU/Linux
> >
> > python:
> > Python 2.5.1 (r251:54863, Feb  5 2008, 15:14:12)
> > [GCC 4.1.2 (Gentoo 4.1.2 p1.0.1)] on linux2
> >
> > ls -l `which python`
> > lrwxrwxrwx 1 root root 18 10. Apr 00:04 /usr/bin/python ->
> > /usr/bin/python2.5
> >
> > I get:
> > Chain operator status:  ### Chain operator status (chainsetup
> > 'pass_jack') ### Chain "chain01":
> >   1. Lowpass filter: [1] cutoff-freq 100.00000000000000000
> > *** glibc detected *** python: munmap_chunk(): invalid pointer:
> > 0x00002b8ca3a700d8 ***
> > ======= Backtrace: =========
> > /lib/libc.so.6(cfree+0x1ac)[0x2b8ca48be7dc]
> > /usr/lib64/python2.5/site-packages/pyecasound.so[0x2b8ca50ec6ee]
> > /usr/lib/libpython2.5.so.1.0[0x2b8ca3c5fc80]
> > /usr/lib/libpython2.5.so.1.0(PyDict_SetItem+0x118)[0x2b8ca3c603ff]
> > /usr/lib/libpython2.5.so.1.0(_PyModule_Clear+0x1e8)[0x2b8ca3c65a58]
> > /usr/lib/libpython2.5.so.1.0(PyImport_Cleanup+0x2ea)[0x2b8ca3cefbc3]
> > /usr/lib/libpython2.5.so.1.0(Py_Finalize+0x95)[0x2b8ca3cfee1c]
> > /usr/lib/libpython2.5.so.1.0(Py_Main+0xdb3)[0x2b8ca3d0f1f4]
> > python(main+0x1b)[0x40081b]
> > /lib/libc.so.6(__libc_start_main+0xf4)[0x2b8ca48651f4]
> > python[0x400789]
> > ======= Memory map: ========
> > 00400000-00401000 r-xp 00000000 08:12
> > 6417361                            /usr/bin/python2.5
> > 00600000-00601000 r--p 00000000 08:12
> > 6417361                            /usr/bin/python2.5
> > 00601000-00602000 rw-p 00001000 08:12
> > 6417361                            /usr/bin/python2.5
> > 00602000-006d9000 rw-p 00602000 00:00 0
> > [heap]
> > <snip>
> >
> > I did "revdev-rebuild". In that sense my system seems to be consistence.
> >
> > Should glibc be downgraded? Wrong USE variables?
>
> you can't downgrade glibc.
>
> re-emerge python  and use python-updater.
>
> And since you are using sabayon, file a bug in their bugzilla.
Neither python or glibc nor ecasound are in the sabayon overlay.


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