Questions and bug report

I am using Fedora 5 with wxWdigets 2.6.3 and Wx-0.57

I have enclosed a program with an xrc file. Points 3 and 4
are the
most important.

1. Why do I need "use Wx::XRC" if I have "use
Wx qw(:everything)"

2. There is a often a double free in libc when debugging. It
doesn't
   always happen.
   $ENV = 0 stops the complaint.  

3. In the program supplied:

   a) Using Menu/Load, it takes 5 seconds to load 5000 lines
into a
      text control.
      Is there anything that I can do to speed this up? Is
there a
      control that can do this faster? I often need to load
files
      having tens of thousands of lines. 

   b) Using Menu/Test List Ctrl:

   The line 
     $list->SetColumnWidth(1,-1) ; 
   causes the error below. The documentation says that the
-1 will
   force the header column to be the size of the data

   Is there a workaround or a fix?

[Debug] 03:11:44 PM: Empty addr2line output?
addr2line: errors.pl: File format not recognized
[Debug] 03:11:44 PM: Empty addr2line output?
addr2line: errors.pl: File format not recognized
[Debug] 03:11:44 PM: Empty addr2line output?
addr2line: errors.pl: File format not recognized
[Debug] 03:11:44 PM: Empty addr2line output?
addr2line: errors.pl: File format not recognized
[Debug] 03:11:45 PM: Empty addr2line output?
[Debug] 03:11:45 PM: ./src/generic/listctrl.cpp(3565):
assert
"wxAssertFailure" failed: invalid column index

Call stack:
[05] wxStackWalker::Walk(unsigned int)       
[06] 0x00619f1a
[07] 0x0061a126
[08] wxAppConsole::OnAssert(char const*, int, char const*,
char const*)
[09] wxApp::OnAssert(char const*, int, char const*, char
const*)
[10] wxOnAssert(char const*, int, char const*, char const*)
[11] wxAssert(int, char const*, int, char const*, char
const*)
[12] wxListMainWindow::SetColumnWidth(int, int)
[13] wxGenericListCtrl::SetColumnWidth(int, int)
[14] XS_Wx__ListCtrl_SetColumnWidth(interpreter*, cv*)
[15] Perl_pp_entersub                        
[16] Perl_runops_standard                    
[17] 0x038cbcbe
[18] Perl_call_sv                            
[19] wxPliEventCallback::Handler(wxEvent&)   
[20] wxAppConsole::HandleEvent(wxEvtHandler*, void
(wxEvtHandler:)(wxEvent&am
p;), wxEvent&) const
[21]
wxEvtHandler::ProcessEventIfMatches(wxEventTableEntryBase
const&,
wxEvtHandler*, wxEvent&)
[22] wxEvtHandler::SearchDynamicEventTable(wxEvent&)
[23] wxEvtHandler::ProcessEvent(wxEvent&)    
[24] 0x00ea9959
[25] g_cclosure_marshal_VOID__VOID           







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