Bug#861645: gsequencer FTBFS on mips/mipsel: FAIL: ags_xorg_application_context_test

[James Cowgill]

Hi,

On 05/05/17 13:36, Joël Krähemann wrote:
> Hi
> 
> finally I got a stack-trace
> 
> Using host libthread_db library "/lib/mipsel-linux-gnu/libthread_db.so.1".
> Core was generated by
> `/home/jkraehemann/gsequencer-0.8.0/.libs/ags_xorg_application_context_test'.
> Program terminated with signal SIGSEGV, Segmentation fault.
> #0  0x75e2af68 in IA__gtk_widget_show_all (widget=0x7280b790) at
> ./gtk/gtkwidget.c:3376
> 3376 ./gtk/gtkwidget.c: No such file or directory.
> (gdb)
> (gdb) bt
> #0  0x75e2af68 in IA__gtk_widget_show_all (widget=0x7280b790) at
> ./gtk/gtkwidget.c:3376
> #1  0x7677b6c8 in ags_machine_selector_popup_new
> (machine_selector=0x728104c0) at
> ags/X/editor/ags_machine_selector.c:569
> #2  0x766b60a4 in ags_automation_editor_init
> (automation_editor=0x7276f238) at ags/X/ags_automation_editor.c:222
> #3  0x75660948 in g_type_create_instance () from
> /usr/lib/mipsel-linux-gnu/libgobject-2.0.so.0
> Backtrace stopped: frame did not save the PC

I ran this test in gdb on a real mips machine. When tracing through
ags_machine_selector_popup_new it seems that the "keys" variable is
never initialized and a garbage pointer is passed to gtk_widget_show_all.

The variable is never initialized because this condition is false:
(AGS_MACHINE_SELECTOR_SHOW_SHIFT_PIANO & (machine_selector->flags)) != 0

Thanks,
James

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