Am 22.08.2016 um 10:51 schrieb Uwe Röger:
Am 22.08.2016 um 08:25 schrieb Graeme Gill:
Uwe Röger wrote:
Ubuntu 16.04.1 Xenial
'*** Error in `/usr/bin/dispread': free(): invalid next size (fast):
0x0000000002104630 ***'
Hmm. Pascal de Bruijn reported a very similar problem in April on Ubuntu
16.04.1.
Alexis Daciuk also reported a very similar looking bug on Linux
kernel 4.6.4-1 and lts 4.4.15-2 quite recently.
I note that Ubuntu 16.04.1 is based on a lts 4.4. kernel.
Attempts to track it down with Alexis failed to identify
the problem :- running dispread under valgrind revealed no issues,
and in fact it ran to completion. This may mean there is a very
subtle bug in the ArgyllCMS xdg_bds.c that valgrind doesn't notice,
or it may mean that there is a bug in the Ubuntu 16.04.1 libc malloc
implementation.
Can you run your test case under valgrind and see what happens ?
Graeme Gill.
Thank you for the tip.
Indeed the calibration ran all the way through and the correction was applied,
when I used
valgrind unity-control-center
(The calibration procedure is called from within the Ubuntu control panel and I
haven't found a
way to invoke it on its own)
FWIW, after that I tried
valgrind --leak-check=full unity-control-center
and could reproduce the crash.
Snippet from the second try:
'Setting up the instrument'
'*** Error in `/usr/bin/dispread': free(): invalid next size (fast):
0x0000000000b03870 ***'
'======= Backtrace: ========='
'/lib/x86_64-linux-gnu/libc.so.6(+0x77725)[0x7fb436f96725]'
'/lib/x86_64-linux-gnu/libc.so.6(+0x7ff4a)[0x7fb436f9ef4a]'
'/lib/x86_64-linux-gnu/libc.so.6(cfree+0x4c)[0x7fb436fa2abc]'
'/usr/bin/dispread[0x5091cc]'
'/usr/bin/dispread[0x420e61]'
'/usr/bin/dispread[0x42216b]'
'/usr/bin/dispread[0x438abc]'
'/usr/bin/dispread[0x40f34b]'
'/usr/bin/dispread[0x408d73]'
'/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7fb436f3f830]'
'/usr/bin/dispread[0x4093b9]'
I have attached the dumps from both sessions and cc'd you because I guess the
attachments will
be stripped for the mailing list. The dump with the --leak-check=full option
enabled is about
2.6MB, so I zipped it.
Best regards, Uwe
