Package: python-cairo
Version: 1.2.0-1
Severity: normal
Steps to reproduce:
1) save the attached program as python-cairo1.py
2) apt-get install xvfb
3) xvfb-run python python-cairo1.py
Expected results:
3) program prints "drawing done"
Actual results:
3) program prints
The application 'python-cairo1.py' lost its connection to the display :99.0;
most likely the X server was shut down or you killed/destroyed
the application.
More info:
1) Uncommenting
#samples[0:3] = [95.5]*3
causes the bug not to occur so it seems to be sensitive to the actual
coordinates involved in the lines.
2) The bug also occurs with xserver-xorg using a real display (vesa
and nv drivers) but without a window manager.
3) xtrace shows some errors near the last request:
000:<:01f2: 16: RENDERRequest(151): RenderChangePicture picture=0x00400072
mask=0x00000001 values={repeat=true(0x01)}
000:<:01f3: 20: RENDERRequest(151): RenderSetPictureFilter picture=0x00400072
name='nearest'
000:<: Warning: Waiting for rest of package (yet got 65516 of 4207108)!
000:<: Warning: buffer filled!
000:<:01f4:4207108: RENDERRequest(151): RenderTrapezoids op=Over(0x03)
src=0x00400072 xSrc=0 ySrc=389 dst=0x0040006f maskFormat=0x0000002c
trapezoids={top=25493504 ...
4) strace of xorg shows that the server just closes the socket after it has
read the request:
23389 select(256, [1 3 4 5 6 11], NULL, NULL, NULL) = ? ERESTARTNOHAND (To be
restarted)
23389 --- SIGALRM (Alarm clock) @ 0 (0) ---
23389 setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 0}}, NULL) = 0
23389 rt_sigreturn(0) = -1 EINTR (Interrupted system call)
23389 select(256, [1 3 4 5 6 11], NULL, NULL, NULL) = 1 (in [11])
23389 setitimer(ITIMER_REAL, {it_interval={0, 20000}, it_value={0, 20000}},
NULL) = 0
23389 read(11, "5\30\4\0\37\0 \0\3... 0\207\17d\0\232\375f\0Tx\0\0", 4096) =
4096
23389 shutdown(11, 2 /* send and receive */) = 0
23389 close(11) = 0
5) I don't know if the bug is in python-cairo, cairo, libxrender or
xorg. Please reassign if you feel this is not an issue of
python-cairo. Also, if you can't reproduce this bug
-- System Information:
Debian Release: 4.0
APT prefers stable
APT policy: (500, 'stable')
Architecture: i386 (i686)
Shell: /bin/sh linked to /bin/bash
Kernel: Linux 2.6.18-6-686-bigmem
Locale: LANG=C, LC_CTYPE=fi_FI (charmap=ISO-8859-1)
Versions of packages python-cairo depends on:
ii libc6 2.3.6.ds1-13etch7 GNU C Library: Shared libraries
ii libcairo2 1.2.4-4.1+etch1 The Cairo 2D vector graphics libra
ii python 2.4.4-2 An interactive high-level object-o
ii python-central 0.5.12 register and build utility for Pyt
python-cairo recommends no packages.
-- no debconf information
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