--- Begin Message ---
- To: Debian Bug Tracking System <submit@bugs.debian.org>
- Subject: ghostscript: evince segfaults on scroll with attached document
- From: kai-martin <knaak@iqo.uni-hannover.de>
- Date: Wed, 10 Sep 2008 14:25:23 +0200
- Message-id: <20080910122523.6230.54668.reportbug@bibo.iqo.uni-hannover.de>
Package: ghostscript
Version: 8.62.dfsg.1-3.1
Severity: normal
evince segfaults on scroll with the document included below.
To reproduce:
1) load the document with evince.
2) set zoom level to 200%
3) pan down with mouse or scroll bar
The application fails when the view port hits the bottom of the document.
There are error messages on stderr:
/-----------------------------------
evince gstest.ps
Locking assertion failure. Backtrace:
#0 /usr/lib/libxcb-xlib.so.0 [0xb6bd0767]
#1 /usr/lib/libxcb-xlib.so.0(xcb_xlib_lock+0x2e) [0xb6bd081e]
#2 /usr/lib/libX11.so.6 [0xb7340dc9]
#3 /usr/lib/libX11.so.6(XUngrabPointer+0x25) [0xb7336c95]
#4 /usr/lib/libgdk-x11-2.0.so.0(gdk_display_pointer_ungrab+0x99) [0xb75f46b9]
#5 /usr/lib/libgdk-x11-2.0.so.0(gdk_pointer_ungrab+0x1a) [0xb75d1d7a]
#6 /usr/lib/gtk-2.0/modules/libgnomebreakpad.so [0xb6801f31]
#7 [0xb7f22420]
#8 /usr/lib/libX11.so.6 [0xb732d833]
#9 /usr/lib/libX11.so.6(XPutImage+0x123) [0xb732dd23]
#10 /usr/lib/libcairo.so.2 [0xb7542e75]
#11 /usr/lib/libcairo.so.2 [0xb7542f1f]
#12 /usr/lib/libcairo.so.2 [0xb75138a3]
#13 /usr/lib/libcairo.so.2 [0xb7518d14]
#14 /usr/lib/libcairo.so.2 [0xb751a2dc]
#15 /usr/lib/libcairo.so.2 [0xb75414f2]
#16 /usr/lib/libcairo.so.2 [0xb75135f9]
#17 /usr/lib/libcairo.so.2 [0xb7515bcf]
#18 /usr/lib/libcairo.so.2 [0xb7516230]
#19 /usr/lib/libcairo.so.2 [0xb7512d8e]
evince: ../../src/xcb_lock.c:77: _XGetXCBBuffer: Assertion `((int) ((xcb_req) - (dpy->request)) >= 0)' failed.
Multiple segmentation faults occurred; can't display error dialog
\---------------------------------
The failing document was produced by geda/gschem. These documents did not fail
before the last update of ghostscript:
/---------------------------------
%!PS-Adobe-3.0
%%Creator: gEDA gschem 20080706
%%CreationDate: Wed Sep 10 13:15:07 2008
%%Title: /tmp/gs/gstest.sch
%%Author: kmk
%%BoundingBox: 0 0 595 841
%%Orientation: Landscape
%%Pages: 1
%%Endcomments
%%BeginProlog
% Prolog for gEDA, define all the functions needed for rendering
% schematics on Postscript devices
% Draw a line from the second coordinate to the first
% x2 y2 x1 y1 width line -
/line {
setlinewidth
% pop off first element and moveto
moveto
% pop off remaining elements and draw a line segment
lineto
% draw it
stroke
} bind def
% Draw a dot
% x y r dot -
/dot {
0 360 arc fill
} bind def
% Draw a dot-dashed line, a bunch of lined segments,
% if the array element only has length two, draw a dot.
% [ [x2 y2 x1 y1] [x4 y4 x3 y3] [x5 y5] ... ] width dashed -
/width 0 def
/dashed {
dup 2.0 div /width exch def
setlinewidth
% pop off each line segment and draw it as a dot or as a line
{
aload length 2 gt
{ moveto lineto stroke}
{ width dot } ifelse
} forall
} bind def
% Draw an arc segment
% x y r ang1 ang2 width darc -
/darc {
setlinewidth
arc stroke
} bind def
% Draw a series of arc segment bits, if the array element only has a single
% element in it, draw a dot.
% [ [sa1 ea1] [sa2 ea2] ... ] x y r width dashedarc -
/x 0 def
/y 0 def
/dashedarc {
dup /width exch def
setlinewidth
/r exch def
/y exch def
/x exch def
{ aload length 1 gt
{
% this element had two angles in it
% extract start and stop angles
x y r % drop x y and r onto stack
% at this point we have: sa ea x y r
% we need x y r sa ea
% so..
5 -2 roll
% and add it to the current path, and draw it
arc stroke
} {
% this element only had one angle in it, place a
% filled dot at the appropriate place
% compute center point of the arc using the angle
% that is on the top of the stack
dup % angle angle
cos r mul x add % angle x
exch % x angle
sin r mul y add % x y
width % x y width/2
dot % draw the dot
} ifelse
} forall
% Now draw it
stroke
} bind def
% Draw a box
% width height x y linethickness box -
/box {
setlinewidth
moveto
exch dup 0 rlineto % w h, h w w 0 -- Draw bottom line
exch 0 exch rlineto % h w, w h 0, w 0 h -- Draw right line
neg 0 rlineto % w, -w 0 -- Draw Top line
closepath % finish and draw it
stroke
} bind def
% Draw a filled box
% width height x y fbox -
/fbox {
moveto
exch dup 0 rlineto
exch 0 exch rlineto
neg 0 rlineto
closepath
fill
} bind def
% Font reincoding utilities
% ISOLatin1Encoding, extended with remaining uncoded glyphs
/ISOLatin1Extended [
/.notdef /Lslash /lslash /OE /oe /Scaron /scaron /Zcaron /zcaron
/Ydieresis /trademark /bullet /dagger /daggerdbl /ellipsis /emdash
/endash /fi /fl /florin /fraction /guilsinglleft /guilsinglright
/perthousand /quotedblbase /quotedblleft /quotedblright
/quotesinglbase /quotesingle /.notdef /.notdef /.notdef /space
/exclam /quotedbl /numbersign /dollar /percent /ampersand
/quoteright /parenleft /parenright /asterisk /plus /comma /minus
/period /slash /zero /one /two /three /four /five /six /seven /eight
/nine /colon /semicolon /less /equal /greater /question /at /A /B /C
/D /E /F /G /H /I /J /K /L /M /N /O /P /Q /R /S /T /U /V /W /X /Y /Z
/bracketleft /backslash /bracketright /asciicircum /underscore
/quoteleft /a /b /c /d /e /f /g /h /i /j /k /l /m /n /o /p /q /r /s
/t /u /v /w /x /y /z /braceleft /bar /braceright /asciitilde
/.notdef /.notdef /.notdef /.notdef /.notdef /.notdef /.notdef
/.notdef /.notdef /.notdef /.notdef /.notdef /.notdef /.notdef
/.notdef /.notdef /.notdef /dotlessi /grave /acute /circumflex
/tilde /macron /breve /dotaccent /dieresis /.notdef /ring /cedilla
/.notdef /hungarumlaut /ogonek /caron /space /exclamdown /cent
/sterling /currency /yen /brokenbar /section /dieresis /copyright
/ordfeminine /guillemotleft /logicalnot /hyphen /registered /macron
/degree /plusminus /twosuperior /threesuperior /acute /mu /paragraph
/periodcentered /cedilla /onesuperior /ordmasculine /guillemotright
/onequarter /onehalf /threequarters /questiondown /Agrave /Aacute
/Acircumflex /Atilde /Adieresis /Aring /AE /Ccedilla /Egrave /Eacute
/Ecircumflex /Edieresis /Igrave /Iacute /Icircumflex /Idieresis /Eth
/Ntilde /Ograve /Oacute /Ocircumflex /Otilde /Odieresis /multiply
/Oslash /Ugrave /Uacute /Ucircumflex /Udieresis /Yacute /Thorn
/germandbls /agrave /aacute /acircumflex /atilde /adieresis /aring
/ae /ccedilla /egrave /eacute /ecircumflex /edieresis /igrave
/iacute /icircumflex /idieresis /eth /ntilde /ograve /oacute
/ocircumflex /otilde /odieresis /divide /oslash /ugrave /uacute
/ucircumflex /udieresis /yacute /thorn /ydieresis
] def
% `new-font-name' `encoding-vector' `old-font-name' RE -
/RE {
findfont
dup maxlength dict begin {
1 index /FID ne { def } { pop pop } ifelse
} forall
/Encoding exch def
dup /FontName exch def
currentdict end definefont pop
} bind def
% Text handling functions, select the font and scale it, then we need
% only to apply the appropriate transformations to get the text
% justified into the right spots. The bad thing here is that we don't
% do any kerning, so the output may look a bit strange.
% compute the height of one character and return lly and ury
% (char) charheight lly ury
/charheight {
gsave % push graphics state
newpath % clear current path
0 0 moveto % Set current point
false charpath % get path
flattenpath % flatten path
pathbbox % stack = llx lly urx ury
exch pop % stack = llx lly ury
3 -1 roll pop % stack = lly ury
grestore % pop graphics state
} bind def
% compute the height of a string, one character at a time
% (string) stringheight lly ury
/lly 0.0 def
/ury 0.0 def
/stringheight {
/lly 0.0 def % initial value of heightmin
/ury 0.0 def % initial value of heightmax
{ % work through string
( ) dup 0 4 -1 roll put % create one character string
charheight % measure it's height
dup ury gt { % if ury gt heightmax
/ury exch def % update with new value
} {
pop % else discard ury
} ifelse
dup lly lt { % if lly lt heightmin
/lly exch def % update with new value
} {
pop % else discard lly
} ifelse
} forall
lly ury % Return the results
} bind def
% calculate the string width taking into account the escapes.
/mystrx 0.0 def
/mystry 0.0 def
/mystresc false def
/mystringwidth {
/mystrx 0.0 def
/mystry 0.0 def
/mystresc false def
{ % work through string
% did we process the escape character last?
mystresc {
% last character was escape
% handle the escape
% is it an _ = 95?
dup 95 eq {
pop % we don't need the character anymore
% toggle drawing overbars
0.0 0.0 % make it like it never happened...
} {
% otherwise measure the character
(\\ ) dup 1 4 -1 roll put % count a \ and the character
stringwidth
} ifelse
% and reset the flag
/mystresc false def
} {
% last character was not escape
% is this escape
dup 92 eq {
% yes, escape character, set flag
/mystresc true def
pop % drop character
0.0 0.0 % make like this character has no width and height
} {
( ) dup 0 4 -1 roll put % create one character string
stringwidth % measure it's height/width
} ifelse
} ifelse
% accumulate x and y movements
mystry add /mystry exch def
mystrx add /mystrx exch def
} forall
mystrx mystry % drop results on stack
} bind def
% Render a string with overbars
%
/escaped false def
/drawoverbar false def
/fontsize 0.0 def
% Show a string, with an overbar over it
% string charshow -
/charshow {
drawoverbar {
% draw an overbar for the character
gsave
fontsize 10.0 div setlinewidth
0 fontsize rmoveto % move to (0,overbarheight)
dup stringwidth pop 0 rlineto % draw line to
stroke
grestore
} if
show
} bind def
/overbarshow {
/drawoverbar false def % start by not drawing overbars
{ % work through string
escaped {
% the last character was the escape
% handle the escape
% is it an _ = 95?
dup 95 eq {
pop % we don't need the character anymore
% toggle drawing overbars
/drawoverbar drawoverbar not def
} {
% otherwise render the character
(\\ ) dup 1 4 -1 roll put % draw a \ and the character
charshow % render the string
} ifelse
% and reset the flag
/escaped false def
} {
% check for escape character \ = 92
dup 92 eq {
% yes, escape character, set flag
/escaped true def
pop % drop character
} {
% no, reset flag and draw character
( ) dup 0 4 -1 roll put % create one character string
charshow
} ifelse
} ifelse
} forall
} bind def
%
% hcenter rjustify vcenter vjustify spacing [(line1) (line2) ... ] rot x y size text -
/stringw 0.0 def
/stringh 0.0 def
/spacing 0.0 def
/strings [ ] def
/stringtxt ( ) def
/stringcount 0 def
/rot 0.0 def
/text {
gsave % save state for later
dup /fontsize exch def % save font size for corrections later
% do font selection
/gEDAFont findfont
exch scalefont
setfont
% set up coordinates
translate % move origin to given point
rotate % rotate so that text is drawn
0 0 moveto
dup length /stringcount exch def % Get number of strings
/strings exch def % save strings
/spacing exch def
% do we have more than 1 string to render?
stringcount 1 eq {
/stringtxt strings aload pop def % get the string
/stringw stringtxt mystringwidth pop neg def % get the -width
/stringh stringtxt stringheight exch pop neg def% get the -height
% First do vertical calculations
% hcenter rjustify vcenter vjustify
% vertical justification
{ 0 stringh rmoveto } if
% vertical center
{ 0 stringh 0.3571425 mul rmoveto } if % not 0.5, so that
% it looks nicer
% Then do horizontal calculations
% right justify
{ stringw 0 rmoveto } if
% center
{ stringw 2.0 div 0 rmoveto } if
% Draw the text
stringtxt overbarshow
} {
% More than one line, compute bounding box for the text
% vertical height, don't use the actual hieght of the characters
% assume that the user wants to make the baselines line up with two
% text boxes placed side by side
/stringh stringcount spacing mul neg def
% Now figure out horizontal size, this amounts to keeping track
% of the longest string
/stringw 0.0 def
strings {
mystringwidth pop
dup stringw gt {
/stringw exch def
} {
pop
} ifelse
} forall
/stringw stringw neg def % get the -width
% First do vertical calculations
% hcenter rjustify vcenter vjustify
% vertical justification
{ 0 stringh fontsize add rmoveto } if
% vertical center
{ 0 stringh 0.5 mul rmoveto } if
% Then do horizontal calculations
% right justify
{ stringw 0 rmoveto } if
% center
{ stringw 2.0 div 0 rmoveto } if
% now move up to the first line and begin rendering
0 stringcount 1 sub spacing mul rmoveto
strings {
gsave % Save starting point
overbarshow % render the text
grestore
0 spacing neg rmoveto
} forall
} ifelse
grestore % Restore old state
} bind def
%%EndProlog
%%Page: 1 1
/gEDAFont ISOLatin1Extended /Helvetica RE
2 setlinecap
0.072000 0.072000 scale
7893 845 translate 90 rotate
0.248095 0.248095 scale
-33800 -32100 translate
gsave
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grestore
gsave
false false false false 260.000000 [(R?) ] 0 52100 49450 187.500000 text
grestore
gsave
false false false false 260.000000 [(XXX) ] 0 52100 49250 187.500000 text
grestore
gsave
false false false false 208.000000 [(0805) ] 0 52100 48850 150.000000 text
grestore
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74100 62400 33800 62400 10 line
33800 62400 33800 32100 10 line
showpage
%%End
\---------------------------------
---<(kaimartin)>---
Kai-Martin Knaak knaak@iqo.uni-hannover.de
Universität Hannover, Inst. f. Quantenoptik tel: +49-511-762-2895
Welfengarten 1, 30167 Hannover fax: +49-511-762-2211
GPG key: http://pgp.mit.edu:11371/pks/lookup?search=Knaak+kmk&op=get
-- System Information:
Debian Release: lenny/sid
APT prefers testing
APT policy: (500, 'testing'), (500, 'stable')
Architecture: i386 (i686)
Kernel: Linux 2.6.18-6-k7 (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages ghostscript depends on:
ii debconf [debc 1.5.22 Debian configuration management sy
ii debianutils 2.30 Miscellaneous utilities specific t
ii defoma 0.11.10-0.2 Debian Font Manager -- automatic f
ii gsfonts 1:8.11+urwcyr1.0.7~pre44-3 Fonts for the Ghostscript interpre
ii libc6 2.7-13 GNU C Library: Shared libraries
ii libgs8 8.62.dfsg.1-3.1 The Ghostscript PostScript/PDF int
Versions of packages ghostscript recommends:
ii psfontmgr 0.11.10-0.2 PostScript font manager -- part of
Versions of packages ghostscript suggests:
ii ghostscript-x 8.62.dfsg.1-3.1 The GPL Ghostscript PostScript/PDF
ii hpijs 2.8.6+2.8.6-2 HP Linux Printing and Imaging - gs
-- no debconf information
--- End Message ---