Re: Event loop hangup when using TimeoutSource and IdleSource

[Chris Vine <chris cvine freeserve co uk>]

On Thu, 24 Sep 2009 16:43:21 -0400
Jim Hodapp <james hodapp gmail com> wrote:
>      I removed the inheritance statement from my Emsac class  
> definition and things seemed more stable. Things remained stable
> until I moved the mouse over some widgets in the main window that
> will accept focus and very shortly after that the application
> segfaulted. The backtrace is as follows:
> 
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread 0xb6bbd720 (LWP 26118)]
> 0xb7c3b439 in Gtk::Label::set_text (this=0x0, str= 0xbfd5ad88) at  
> label.cc:252
> 252     label.cc: No such file or directory.
>          in label.cc
> (gdb) bt
> #0  0xb7c3b439 in Gtk::Label::set_text (this=0x0, str= 0xbfd5ad88)
> at label.cc:252

Jim,

Having finished with threads, which seem irrelevant to this, you will
notice that this crash is caused by a call on a null pointer argument
for a Gtk::Label object.  You still seem to have an object lifetime
issue.  The label doesn't seem to exist when the idle handler executes.

Chris