svn trunk segmentation faults

Sun Jan 13 07:36:31 PST 2008

Hi,
My app no longer works with the latest svn trunk and seems to break when
it loads an html list box. In the debug build I get the following
asserts, showing just the first assert each time I run my app then the
app segfaults:

[Debug] 15:19:21: ../include/wx/html/htmltag.h(135): assert
"m_hasEnding" failed in GetEndIter2().

[Debug] 15:28:35: ../src/common/stringimpl.cpp(187): assert
"wxAssertFailure" failed in wxStringImpl(): first must be before last

These were from the GTK build. The windows build segfaults as well.

I got the following backtrace from gnome one time:

[New Thread 0xb72f5a50 (LWP 1797)]
[New Thread 0xb6bd6b90 (LWP 1814)]
0xb7702321 in waitpid () from /lib/libpthread.so.0
#0  0xb7702321 in waitpid () from /lib/libpthread.so.0
#1  0xb79196a4 in g_spawn_sync () from /usr/lib/libglib-2.0.so.0
#2  0xb79199bc in g_spawn_command_line_sync ()
from /usr/lib/libglib-2.0.so.0
#3  0xb7fb0268 in ?? ()
from /usr/lib/gtk-2.0/modules/libgnomebreakpad.so
#4  <signal handler called>
#5  0x08075047 in
wxStringOperationsUtf8::IncIter<wxStringImpl::const_iterator>
    (i=@0xbfd7b9f4) at ../include/wx/stringops.h:79
#6  0x08075123 in
wxStringOperationsUtf8::DiffIters<wxStringImpl::const_iterator>
(i1={m_ptr = 0x1132a60c <Address 0x1132a60c out of bounds>}, i2=
      {m_ptr = 0x8a0f000 <Address 0x8a0f000 out of bounds>})
    at ../include/wx/stringops.h:135
#7  0x0807515e in wxString::const_iterator::operator- (this=0xbfd7ba3c, 
    i=@0xbfd7ba24) at ../include/wx/string.h:692
#8  0x080751a3 in wxString::length (this=0xbfd7ba8c)
    at ../include/wx/string.h:1036
#9  0x0813f182 in wxHtmlTag::GetParamAsColour (this=0x898b6c8, 
    par=@0xbfd7bb94, clr=0xbfd7bb64) at ../src/html/htmltag.cpp:473
#10 0x0811b3a8 in wxHTML_Handler_FONT::HandleTag (this=0xb6a004a8, 
    tag=@0x898b6c8) at ../src/html/m_fonts.cpp:45
#11 0x0813b6d7 in wxHtmlParser::AddTag (this=0xb6a00a60, tag=@0x898b6c8)
    at ../src/html/htmlpars.cpp:317
#12 0x0813b596 in wxHtmlParser::DoParsing (this=0xb6a00a60, 
    begin_pos_=@0xbfd7be68, end_pos=@0xbfd7be50)
    at ../src/html/htmlpars.cpp:302
#13 0x0813b74e in wxHtmlParser::AddTag (this=0xb6a00a60, tag=@0x891fa90)
    at ../src/html/htmlpars.cpp:324
#14 0x0813b596 in wxHtmlParser::DoParsing (this=0xb6a00a60, 
    begin_pos_=@0xbfd7c008, end_pos=@0xbfd7bff0)
    at ../src/html/htmlpars.cpp:302
#15 0x0813b74e in wxHtmlParser::AddTag (this=0xb6a00a60, tag=@0x8989000)
    at ../src/html/htmlpars.cpp:324
#16 0x0813b596 in wxHtmlParser::DoParsing (this=0xb6a00a60, 
    begin_pos_=@0xbfd7c17c, end_pos=@0xbfd7c164)
    at ../src/html/htmlpars.cpp:302
#17 0x08119edf in wxHtmlTagHandler::ParseInner (this=0xb6a02040, 
    tag=@0x8959dd8) at ../include/wx/html/htmlpars.h:247
#18 0x0812ba38 in wxHTML_Handler_TABLE::HandleTag (this=0xb6a02040, 
    tag=@0x8959dd8) at ../src/html/m_tables.cpp:713
#19 0x0813b6d7 in wxHtmlParser::AddTag (this=0xb6a00a60, tag=@0x8959dd8)
    at ../src/html/htmlpars.cpp:317
#20 0x0813b596 in wxHtmlParser::DoParsing (this=0xb6a00a60, 
    begin_pos_=@0xbfd7c50c, end_pos=@0xbfd7c4f4)
    at ../src/html/htmlpars.cpp:302
#21 0x0813b802 in wxHtmlParser::DoParsing (this=0xb6a00a60)
    at ../src/html/htmlpars.cpp:261
#22 0x0813b8c8 in wxHtmlParser::Parse (this=0xb6a00a60,
source=@0xbfd7c5a0)
    at ../src/html/htmlpars.cpp:106
#23 0x08130887 in wxHtmlListBox::CacheItem (this=0x88ca010, n=2)
    at ../src/generic/htmllbox.cpp:305
#24 0x08130be9 in wxHtmlListBox::OnMeasureItem (this=0x88ca010, n=2)
    at ../src/generic/htmllbox.cpp:378
#25 0x082d5b0d in wxVListBox::OnGetRowHeight (this=0x88ca010, line=2)
    at ../src/generic/vlbox.cpp:349
#26 0x0807b6ff in wxVarVScrollHelper::OnGetUnitSize (this=0x88ca170,
n=2)
    at ../include/wx/vscroll.h:344
#27 0x082d8c6f in wxVarScrollHelperBase::RefreshUnits (this=0x88ca170,
from=0, 
    to=8) at ../src/generic/vscroll.cpp:504
#28 0x08131fd4 in wxVarVScrollHelper::RefreshRows (this=0x88ca170,
from=0, 
    to=8) at ../include/wx/vscroll.h:325
#29 0x0812f936 in wxHtmlListBox::RefreshRows (this=0x88ca010, from=0,
to=8)
    at ../src/generic/htmllbox.cpp:337
#30 0x082d86b8 in wxVarVScrollLegacyAdaptor::RefreshLines
(this=0x88ca170, 
    from=0, to=8) at ../src/generic/vscroll.cpp:950
#31 0x080677ee in MainFrame::OnHtmlListBoxUpdate (this=0x8894a08)
    at mainframe.cpp:1197
#32 0x0807e896 in ProcessCmd::do_hlistsetitem_entry (this=0x88866e8)
    at processcmd.cpp:556
#33 0x0807fc54 in ProcessCmd::Doit (this=0x88866e8, cmd=0x8979308)
    at processcmd.cpp:872
#34 0x080682d3 in MainFrame::OnRead (this=0x8894a08, event=@0x89788e0)
    at mainframe.cpp:754
#35 0x0834d5b1 in wxAppConsoleBase::HandleEvent (this=0x85d4728, 
    handler=0x8894a08, func=0x806824a
<MainFrame::OnRead(wxCommandEvent&)>, 
    event=@0x89788e0) at ../src/common/appbase.cpp:417
#36 0x08401484 in wxEvtHandler::ProcessEventIfMatches
(entry=@0x85adfc8, 
    handler=0x8894a08, event=@0x89788e0) at ../src/common/event.cpp:1222
#37 0x08403378 in wxEventHashTable::HandleEvent (this=0x85adf04, 
    event=@0x89788e0, self=0x8894a08) at ../src/common/event.cpp:901
#38 0x084034c6 in wxEvtHandler::ProcessEvent (this=0x8894a08,
event=@0x89788e0)
    at ../src/common/event.cpp:1284
#39 0x08401ff4 in wxEvtHandler::ProcessPendingEvents (this=0x8894a08)
    at ../src/common/event.cpp:1184
#40 0x0834f6dd in wxAppConsoleBase::ProcessPendingEvents
(this=0x85d4728)
    at ../src/common/appbase.cpp:372
#41 0x0820cbbf in wxAppBase::ProcessIdle (this=0x85d4728)
    at ../src/common/appcmn.cpp:355
#42 0x0819f91b in wxApp::DoIdle (this=0x85d4728)
at ../src/gtk/app.cpp:193
#43 0x0819f9fb in wxapp_idle_callback () at ../src/gtk/app.cpp:165
#44 0xb78e6661 in ?? () from /usr/lib/libglib-2.0.so.0
#45 0x00000000 in ?? ()

This part of the application code has worked fine for the last year,
although I'm not saying it's not my fault!

Cheers
Mark.