[lazarus] GDK calling problems

[Markku Niskanen]

On Tue, 24 Aug 1999 12:59:13 +0200 (CEST), you wrote:

>type 'bt' in gdb to see a backtrace from which placed it's called. Because
>the call to this tobject method is with the wrong 'this' the bug is in the
>caller

	Okay, now I have done some backtracing in the 
	LCL made windows. This is what happens when
	the LEFT key is pressed. Problems occur with the
	following keys (the address(BT line #1) is given as well):

	TAB	0x0
	UP	0x2
	LEFT	0x4
	DOWN	0x3
	RIGHT	0x5

	The apps only crash using these keys, possibly there
	is "address 0x0" hanging somewhere as well. Do these
	keys have special handling in GDK? I have not been
	able to find the explanation yet. The backtrace when
	RIGHT KEY is pressed is as follows:

#0  0x807bae4 in TOBJECT__CLASSTYPE (this=Cannot access memory at
address0x5.) at objpas.inc:114
#1  0x807bc1c in TOBJECT__DISPATCH (MESSAGE=void, this=
Cannot access memory at address 0x5.) at objpas.inc:209
#2  0x805570a in gtkfocusCB () at buttons.inc:97
#3  0x81256b0 in gtk_marshal_INT () at syslinux.pp:723
#4  0x80f87b4 in gtk_handlers_run () at syslinux.pp:723
#5  0x80f7e17 in gtk_signal_real_emit () at syslinux.pp:723
#6  0x80f656a in gtk_signal_emit () at syslinux.pp:723
#7  0x809fd88 in gtk_container_focus () at syslinux.pp:723
#8  0x81245b4 in gtk_window_key_press_event () at syslinux.pp:723
#9  0x81255f0 in gtk_marshal_BOOL__POINTER () at syslinux.pp:723
#10 0x80f7e4d in gtk_signal_real_emit () at syslinux.pp:723
#11 0x80f656a in gtk_signal_emit () at syslinux.pp:723
#12 0x811e4d8 in gtk_widget_event () at syslinux.pp:723
#13 0x80d48ba in gtk_propagate_event () at syslinux.pp:723
#14 0x80d3edf in gtk_main_do_event () at syslinux.pp:723
#15 0x400fcb02 in gdk_event_dispatch (source_data=0x0, 
    current_time=0xbffffc1c, user_data=0x0) at gdkevents.c:2098
#16 0x8130ffe in g_main_dispatch () at syslinux.pp:723
#17 0x81314bd in g_main_iterate () at syslinux.pp:723
#18 0x81315cf in g_main_run () at syslinux.pp:723
#19 0x80d3a8b in gtk_main () at syslinux.pp:723
#20 0x8056184 in _GTKINT () at buttons.inc:97
#21 0x805d274 in TAPPLICATION__RUN (
    this={<TCOMPONENT> = {<TPERSISTENT> = {<TOBJECT> = {_vptr. =
{0x8165d0b, 
              0x0}}, }, FOWNER = 0x0, FNAME = 0x0, FTAG = 0, 
        FCOMPONENTS = 0x816f644, FFREENOTIFIES = 0x0, FDESIGNINFO = 0,

        FVCLCOMOBJECT = 0x0, FCOMPONENTSTATE = Invalid C/C++ type code
10
in symbol table.
) at application.inc:53
#22 0x807fc12 in program_init () at syslinux.pp:723
#23 0x8050a0f in _haltproc ()


-- 
markku.niskanen at laatumikro.fi