#76 SIGSEGV when opening a shell

[Rutger Ovidius]

I am using latest CVS of swt-fox. I open a shell in my
gcj compiled app a few times and after doing so 2-5
times I always get the following SIGSEGV.

No testcase yet, but maybe it looks familiar?

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1079712064 (LWP 30895)]
0x4ba3a1fb in ?? ()
(gdb) bt
#0 0x4ba3a1fb in ?? ()
#1 0x4349921b in _XError ()
from /usr/X11R6/lib/libX11.so.6
#2 0x4349677a in _XReadEvents ()
from /usr/X11R6/lib/libX11.so.6
#3 0x43481b82 in XIfEvent ()
from /usr/X11R6/lib/libX11.so.6
#4 0x40e9b951 in FXEmbedApp::getServerTime ()
from ./lib/libswt-fox-3000r4.so
#5 0x40e9bc34 in FXEmbedTopWindow::setFocus ()
from ./lib/libswt-fox-3000r4.so
#6 0x40ea7a63 in FXCustomTopWindow::setFocus ()
from ./lib/libswt-fox-3000r4.so
#7 0x40eaa7d3 in
Java_org_eclipse_swt_internal_fox_OS_FXWindow_1setFo
cus ()
from ./lib/libswt-fox-3000r4.so
#8 0x0813dce2 in
org::eclipse::swt::internal:🦊:OS::FXWindow_setFocu
s ()
#9 0x0813dd2a in
org::eclipse::swt::widgets::Display::setFocusHandle ()
#10 0x0814181a in
org::eclipse::swt::widgets::Decorations::bringToTop ()
#11 0x08146513 in
org::eclipse::swt::widgets::Control::forceFocus ()
#12 0x0814774a in
org::eclipse::swt::widgets::Control::setFocus ()
#13 0x0814787c in
org::eclipse::swt::widgets::Control::setTabItemFocus ()
#14 0x08147857 in
org::eclipse::swt::widgets::Control::setTabGroupFocus
()
#15 0x08147d6b in
org::eclipse::swt::widgets::Control::traverseGroup ()
#16 0x08142830 in
org::eclipse::swt::widgets::Decorations::fixFocus ()
#17 0x0812f0a4 in
org::eclipse::swt::widgets::Shell::open ()
#18 0x080e9132 in
org::eclipse::jface:🪟:Window::open ()

[Ivan Markov]

Logged In: YES
user_id=714267

Yes, I have several very similar crash reports.

Do you, by any chance also run the embedded browser in the
shell or in another shell in the app?

[Rutger Ovidius]

Logged In: YES
user_id=937578

Yes, I have the web browser embedded in the app's main shell
(in another composite, but hidden in another tab [a
Stacklayout]). It is there, but not used when the crash
occurs.

[Nobody/Anonymous]

Logged In: NO

I get this all the time (beta 4). It is pretty bad.
Here is a stacktrace with line numbers from hs_err_pid.log file
if it helps:

Current Java thread:
at org.eclipse.swt.internal.fox.OS.FXWindow_setFocus
(Native Method)
- locked <0x4976eaf8> (a java.lang.Class)
at org.eclipse.swt.widgets.Display.setFocusHandle
(Display.java:1461)
at org.eclipse.swt.widgets.Decorations.bringToTop
(Decorations.java:326)
at org.eclipse.swt.widgets.Control.forceFocus
(Control.java:599)
at org.eclipse.swt.widgets.Control.setFocus
(Control.java:1924)
at org.eclipse.swt.widgets.Control.setTabItemFocus
(Control.java:2176)
at org.eclipse.swt.widgets.Control.setTabGroupFocus
(Control.java:2171)
at org.eclipse.swt.widgets.Control.traverseGroup
(Control.java:2519)
at org.eclipse.swt.widgets.Decorations.fixFocus
(Decorations.java:876)
at org.eclipse.swt.widgets.Shell.open(Shell.java:599)