Source: motif
Version: 2.3.4-5
Severity: serious
In order to fix bug #730026 (Keyboard navigation of menus not working
correctly) [1], I included an updated fix from upstream's bug #1565
(The active window changes to inactive when the drop down list is
clicked) [2].
Unfortunately, this fix causes ddd [3] and xpdf [4] to segfault, as
reported in Ubuntu's bug tracker.
Steps to reproduce in ddd:
(1) compile a simple C program (e.g. hello world) with debugging info
(2) run ddd and open the program
(3) right-click over some empty space in the Source Window
for the 'Set Breakpoint' popup menu to appear
(4) right-click over some text in the Source Window
for the 'Print / Display' popup menu to appear
(5) press a key (e.g. Ctrl)
Repeat steps 3 through 5 until a segfault occurs
Steps to reproduce in xpdf:
(1) open a PDF document in xpdf
(2) right-click on the page for the popup menu to appear
(3) select 'Full screen' to toggle full screen mode
(4) press a key (e.g. Ctrl)
Repeat steps 2 through 4 until a segfault occurs
The problem occurs around line 622 (after 18-updated-fix-1565.patch is
applied) of lib/Xm/Xm.c in Motif.
if (grabw_top) {
if (event->type == KeyPress || event->type == KeyRelease)
event->xany.window = XtWindow(grabw_top->w);
}
XtWindow is called, but grabw_top->w no longer points to a valid
widget as the popup menu has been destroyed. While this may be caused
by errant behaviour on the part of ddd and xpdf (xpdf seems to destroy
the popup menu from within its own callback function), and since the
updated fix for #1565 is not yet part of an official Motif release, I
am inclined to drop fix #1565 completely so that we can have a working
ddd and xpdf and keyboard navigation in menus in Jessie.
As far as I am concerned, the original bug #1565 is purely cosmetic,
and only affects certain window managers / desktop environments.
I'd appreciate any comments from maintainers of other Motif packages.
[1] http://bugs.debian.org/730026
[2] http://bugs.motifzone.net/show_bug.cgi?id=1565
[3] https://bugs.launchpad.net/ubuntu/+source/ddd/+bug/1354961
[4] https://bugs.launchpad.net/ubuntu/+source/xpdf/+bug/1372649
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