Segfault in gtkclist.c on removing last row
- From: "Oliver Elphick" <olly lfix co uk>
- To: gtk-list gnome org
- Subject: Segfault in gtkclist.c on removing last row
- Date: Mon, 31 Jul 2000 22:54:18 +0100
I have a program which allows the user to select a row in a glist and click
a button to remove the row.
If I add one row to an empty clist and then remove it, I have no problem,
but if I had more than one row and remove each of them (one at a time), the
program segfaults on removing the last row.
The clist is inside a scrolled window.
Here is the backtrace (gtk+ 1.2.8, Debian package from Helix):
#0 draw_rows (clist=0x889a9b8, area=0xbfffe55c) at gtkclist.c:5957
#1 0x8536823 in vadjustment_value_changed (adjustment=0x889a910,
data=0x889a9b8) at gtkclist.c:6211
#2 0x85616a4 in gtk_marshal_NONE__NONE (object=0x889a910,
func=0x85365fc <vadjustment_value_changed>, func_data=0x889a9b8,
args=0xbfffe65c) at gtkmarshal.c:312
#3 0x85879b4 in gtk_handlers_run (handlers=0x8891780, signal=0xbfffe608,
object=0x889a910, params=0xbfffe65c, after=0) at gtksignal.c:1917
#4 0x8586f9e in gtk_signal_real_emit (object=0x889a910, signal_id=95,
params=0xbfffe65c) at gtksignal.c:1477
#5 0x8585731 in gtk_signal_emit_by_name (object=0x889a910,
name=0x865bcc7 "value_changed") at gtksignal.c:618
#6 0x85361dc in adjust_adjustments (clist=0x889a9b8, block_resize=0)
at gtkclist.c:6074
#7 0x852eb32 in real_remove_row (clist=0x889a9b8, row=0) at gtkclist.c:2779
#8 0x852e61f in gtk_clist_remove (clist=0x889a9b8, row=0) at gtkclist.c:2606
The segfault is because list is an invalid pointer.
I haven't got any further with diagnosis, but perhaps someone has an idea
of what is going wrong?
(I won't bother to show the code at this stage, because I am using an
Eiffel wrapper of GTK+; the C code generated by the Eiffel compiler is not
comprehensible to humans.)
I also have a problem with debugging, because if I hit a breakpoint, the whole
of
X freezes and I have to go to a console window to use the debugger, which is
inconvenient. It also means I can't use ddd. Is there any way to get
round this?
--
Oliver Elphick Oliver.Elphick@lfix.co.uk
Isle of Wight http://www.lfix.co.uk/oliver
PGP: 1024R/32B8FAA1: 97 EA 1D 47 72 3F 28 47 6B 7E 39 CC 56 E4 C1 47
GPG: 1024D/3E1D0C1C: CA12 09E0 E8D5 8870 5839 932A 614D 4C34 3E1D 0C1C
========================================
"Have not I commanded thee? Be strong and of a good
courage; be not afraid, neither be thou dismayed; for
the LORD thy God is with thee whithersoever thou
goest." Joshua 1:9
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