Bug#656359: fontforge: Segfault when pressing modifier/arrow keys if more than 4 points are selected
Package: fontforge Version: 0.0.20110222-6 Severity: grave Fontforge consistently crashes (segmentation fault) when pressing any modifier key (Ctrl, Alt or Shift) or arrow key if more than 4 points are currently selected. This is annoying for font editing, as all keyboard shortcuts become virtually crippled. And the crash can cause the loss of unsaved data. Steps to reproduce: - Start fontforge and create a new font. - Randomly choose a first glyph to edit. - Draw splines with at least 5 points. - Select up to 4 points and press a modifier or arrow key. It won't crash. - Select at least 5 points and press a modifier or arrow key. It will always crash. -- System Information: Debian Release: wheezy/sid APT prefers unstable APT policy: (500, 'unstable'), (500, 'testing') Architecture: amd64 (x86_64) Kernel: Linux 3.1.0-1-amd64 (SMP w/4 CPU cores) Locale: LANG=th_TH.utf8, LC_CTYPE=th_TH.utf8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Versions of packages fontforge depends on: ii libc6 2.13-24 ii libcairo2 1.10.2-6.2 ii libfontconfig12.8.0-3 ii libfontforge1 0.0.20110222-6 ii libfreetype6 2.4.8-1 ii libgdraw4 0.0.20110222-6 ii libgif4 4.1.6-9 ii libglib2.0-0 2.30.2-5 ii libice6 2:1.0.7-2 ii libjpeg8 8c-2 ii libpango1.0-0 1.29.4-2thep1 ii libpng12-01.2.46-4 ii libpython2.7 2.7.2-12 ii libsm62:1.2.0-2 ii libspiro0 20071029-2 ii libtiff4 3.9.5-2 ii libuninameslist0 0.0.20091231-1.1 ii libx11-6 2:1.4.4-4 ii libxft2 2.2.0-3 ii libxml2 2.7.8.dfsg-6 ii zlib1g1:1.2.3.4.dfsg-3 fontforge recommends no packages. Versions of packages fontforge suggests: pn autotrace none pn fontforge-doc none pn fontforge-extras none pn potrace none pn python-fontforge none -- no debconf information -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org
Bug#656359: [Pkg-fonts-devel] Bug#656359: fontforge: Segfault when pressing modifier/arrow keys if more than 4 points are selected
On 01/18/2012 01:33 PM, Theppitak Karoonboonyanan wrote: Package: fontforge Version: 0.0.20110222-6 Severity: grave Fontforge consistently crashes (segmentation fault) when pressing any modifier key (Ctrl, Alt or Shift) or arrow key if more than 4 points are currently selected. This is annoying for font editing, as all keyboard shortcuts become virtually crippled. And the crash can cause the loss of unsaved data. Steps to reproduce: - Start fontforge and create a new font. - Randomly choose a first glyph to edit. - Draw splines with at least 5 points. - Select up to 4 points and press a modifier or arrow key. It won't crash. - Select at least 5 points and press a modifier or arrow key. It will always crash. I can reproduce this on an i386 system with the same version of fontforge. :( When trying to get a backtrace with fontforge-dbg 0.0.20110222-6 installed, i get the following error message (twice) from gdb: warning: the debug information found in /usr/lib/debug//usr/bin/fontforge does not match /usr/bin/fontforge (CRC mismatch). Pressing ahead anyway, i can trigger the segfault, and i get this (partially-mangled) backtrace: xb7c7ec4c in CVLayer (cv=0x86a3858) at cvundoes.c:552 552 cvundoes.c: No such file or directory. in cvundoes.c (gdb) bt #0 0xb7c7ec4c in CVLayer (cv=0x86a3858) at cvundoes.c:552 #1 0x0808faf0 in ?? () #2 0xb7b97518 in GMenuSearchShortcut (gw=0x85f70f0, mi=optimized out, event= 0xbfffe8c8, call_moveto=1) at gmenu.c:951 #3 0xb7b9bc5c in GMenuBarCheckKey (g=0x85f7200, event=0xbfffe8c8) at gmenu.c:1500 #4 0xb7b6ce4d in _GWidget_TopLevel_Key (top=optimized out, ew=0x85fd7f0, event=0xbfffe8c8) at gcontainer.c:498 #5 0xb7b6e1a7 in _GWidget_Container_eh (gw=0x85fd7f0, event=0xbfffe8c8) at gcontainer.c:337 #6 0xb7bcbe74 in dispatchEvent (gdisp=optimized out, event=0xbfffea7c) at gxdraw.c:3869 #7 0xb7bcd21c in GXDrawEventLoop (gd=0x8439f48) at gxdraw.c:3968 #8 0xb7b7097b in GDrawEventLoop (gdisp=optimized out) at gdraw.c:748 #9 0x08061f5a in ?? () #10 0xb6bcbe46 in __libc_start_main (main=0x80611b0, argc=1, ubp_av= 0xb864, init=0x81c8660, fini=0x81c8650, rtld_fini=0xb7ff1310, stack_end=0xb85c) at libc-start.c:228 #11 0x08062cd1 in ?? () Backtrace stopped: Not enough registers or memory available to unwind further (gdb) hope this is helpful in debugging, --dkg signature.asc Description: OpenPGP digital signature
Bug#656359: [Pkg-fonts-devel] Bug#656359: Bug#656359: fontforge: Segfault when pressing modifier/arrow keys if more than 4 points are selected
To the best of my knowledge this error occurs because of a change in something that fontforge is dependent upon not because of a change in fontforge itself the same error occurs if one puts an older version of fontforge on a newer Linux. I got the same error when I upgrade unbuntu-9.10 to ubuntu-10.04, and also when I tried running fontforge on PuppyLinux, both using a 2009 build. I thought briefly by using a newer build had solved this, but on checking the further it is still there - just that it a few case one can use these keys. The widgets for fontforge where written by George Williams himself which may make check dependencies a little harder. Of course saying this does not mean that changing the depends list will solve the problem but it is a good place to start. John Knightley On Thu, Jan 19, 2012 at 6:36 AM, Daniel Kahn Gillmor d...@fifthhorseman.netwrote: On 01/18/2012 01:33 PM, Theppitak Karoonboonyanan wrote: Package: fontforge Version: 0.0.20110222-6 Severity: grave Fontforge consistently crashes (segmentation fault) when pressing any modifier key (Ctrl, Alt or Shift) or arrow key if more than 4 points are currently selected. This is annoying for font editing, as all keyboard shortcuts become virtually crippled. And the crash can cause the loss of unsaved data. Steps to reproduce: - Start fontforge and create a new font. - Randomly choose a first glyph to edit. - Draw splines with at least 5 points. - Select up to 4 points and press a modifier or arrow key. It won't crash. - Select at least 5 points and press a modifier or arrow key. It will always crash. I can reproduce this on an i386 system with the same version of fontforge. :( When trying to get a backtrace with fontforge-dbg 0.0.20110222-6 installed, i get the following error message (twice) from gdb: warning: the debug information found in /usr/lib/debug//usr/bin/fontforge does not match /usr/bin/fontforge (CRC mismatch). Pressing ahead anyway, i can trigger the segfault, and i get this (partially-mangled) backtrace: xb7c7ec4c in CVLayer (cv=0x86a3858) at cvundoes.c:552 552 cvundoes.c: No such file or directory. in cvundoes.c (gdb) bt #0 0xb7c7ec4c in CVLayer (cv=0x86a3858) at cvundoes.c:552 #1 0x0808faf0 in ?? () #2 0xb7b97518 in GMenuSearchShortcut (gw=0x85f70f0, mi=optimized out, event= 0xbfffe8c8, call_moveto=1) at gmenu.c:951 #3 0xb7b9bc5c in GMenuBarCheckKey (g=0x85f7200, event=0xbfffe8c8) at gmenu.c:1500 #4 0xb7b6ce4d in _GWidget_TopLevel_Key (top=optimized out, ew=0x85fd7f0, event=0xbfffe8c8) at gcontainer.c:498 #5 0xb7b6e1a7 in _GWidget_Container_eh (gw=0x85fd7f0, event=0xbfffe8c8) at gcontainer.c:337 #6 0xb7bcbe74 in dispatchEvent (gdisp=optimized out, event=0xbfffea7c) at gxdraw.c:3869 #7 0xb7bcd21c in GXDrawEventLoop (gd=0x8439f48) at gxdraw.c:3968 #8 0xb7b7097b in GDrawEventLoop (gdisp=optimized out) at gdraw.c:748 #9 0x08061f5a in ?? () #10 0xb6bcbe46 in __libc_start_main (main=0x80611b0, argc=1, ubp_av= 0xb864, init=0x81c8660, fini=0x81c8650, rtld_fini=0xb7ff1310, stack_end=0xb85c) at libc-start.c:228 #11 0x08062cd1 in ?? () Backtrace stopped: Not enough registers or memory available to unwind further (gdb) hope this is helpful in debugging, --dkg ___ Pkg-fonts-devel mailing list pkg-fonts-de...@lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/pkg-fonts-devel
Bug#656359: [Pkg-fonts-devel] Bug#656359: Bug#656359: fontforge: Segfault when pressing modifier/arrow keys if more than 4 points are selected
Quoting Daniel Kahn Gillmor (d...@fifthhorseman.net): I can reproduce this on an i386 system with the same version of fontforge. :( When trying to get a backtrace with fontforge-dbg 0.0.20110222-6 installed, i get the following error message (twice) from gdb: Anyone in the pkg-fonts team wanting to take responsibility on getting in touch with fontforge upstream about this issue? Kestutis is unfortunately unresponsive these days and I tried to do my best to at least keep some maintenance on fontforge, but my expertise is not enough, here (and so is my free time). So, really, help woul dbe appreciated. signature.asc Description: Digital signature
Bug#656359: [Pkg-fonts-devel] Bug#656359: Bug#656359: Bug#656359: fontforge: Segfault when pressing modifier/arrow keys if more than 4 points are selected
On 01/19/2012 01:08 AM, Christian PERRIER wrote:
Anyone in the pkg-fonts team wanting to take responsibility on getting
in touch with fontforge upstream about this issue?
i've just written to the fontforge-devel list, cc'ing this bug report,
and marked this bug as forwarded to
http://sourceforge.net/mailarchive/message.php?msg_id=28696933
So, really, help woul dbe appreciated.
i'm also not very clear how i should go about this. I'm particularly
concerned, though, because of the weird gdb error messages, which i have
no idea how to interpret or workaround.
I've tried a rebuild of fontforge from source on a sid i386 system, and
my self-generated packages give the same gdb error (and show the same
crashing behavior, of course).
here's a bit more detail i managed to coax out of the debugger, though:
Program received signal SIGSEGV, Segmentation fault.
0xb7c85c4c in CVLayer (cv=0x8667c60) at cvundoes.c:552
552 return( cv-layerheads[cv-drawmode]-cv-sc-layers );
(gdb) bt
#0 0xb7c85c4c in CVLayer (cv=0x8667c60) at cvundoes.c:552
#1 0x0808fb00 in ?? ()
#2 0xb7b9c618 in GMenuSearchShortcut (gw=0x8614408, mi=optimized out,
event=0xbfffe038, call_moveto=1) at gmenu.c:951
#3 0xb7ba0d5c in GMenuBarCheckKey (g=0x8614498, event=0xbfffe038) at
gmenu.c:1500
#4 0xb7b71f4d in _GWidget_TopLevel_Key (top=optimized out,
ew=0x8619b98, event=0xbfffe038) at gcontainer.c:498
#5 0xb7b732a7 in _GWidget_Container_eh (gw=0x8619b98, event=0xbfffe038)
at gcontainer.c:337
#6 0xb7bd16cc in dispatchEvent (gdisp=optimized out,
event=0xbfffe1ec) at gxdraw.c:3869
#7 0xb7bd2b6c in GXDrawEventLoop (gd=0x847ad30) at gxdraw.c:3968
#8 0xb7b75a7b in GDrawEventLoop (gdisp=optimized out) at gdraw.c:748
#9 0x08061f6a in ?? ()
#10 0xb6bbde46 in __libc_start_main () from
/lib/i386-linux-gnu/i686/cmov/libc.so.6
#11 0x08062ce1 in ?? ()
Backtrace stopped: Not enough registers or memory available to unwind
further
(gdb) print *(cv-sc)
Cannot access memory at address 0x4324
(gdb) print *cv
$1 = {next = 0x4324, fv = 0x44148000, sc = 0x4324, layerheads =
{0x44148000, 0x4324, 0x44148000},
drawmode = 51 '3', ft_gridfitwidth = 82, gridfit = 0xfffefffe,
container = 0x0}
(gdb)
not sure what to make of it, though. my fontforge programming chops are
weak.
all the best,
--dkg
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