AM: Thank you for showing us a direction to debug the issue.

When running your script, I get:

wxWidgets 2.009004 for msw; 
    compiler compatibility: gcc 3.4; options: no debug, unicode, no ms
+lu

-lwxbase29u
-lwxmsw29u_richtext
-lwxmsw29u_core
-lwxmsw29u_stc
-lwxmsw29u_aui
-lwxmsw29u_gl
-lwxbase29u_net
-lwxmsw29u_html
-lwxmsw29u_media
-lwxbase29u_xml
-lwxmsw29u_webview
-lwxmsw29u_propgrid
-lwxmsw29u_xrc
-lwxmsw29u_adv
-lwxmsw29u_ribbon

[download]

What's your opinion?

Many TIA - Helen

NB is it right to assume the following: looking at the crash in the OP, it seems that it occurred in 01_load.t . That test script goes:

#!/usr/bin/perl -w

use strict;
use Test::More tests => 50;

use_ok( 'Wx::Demo' );
use_ok( 'Wx::DemoModules::lib::BaseModule' );
use_ok( 'Wx::DemoModules::lib::DataObjects' );
use_ok( 'Wx::DemoModules::wxBitmapButton' );
use_ok( 'Wx::DemoModules::wxBoxSizer' );
use_ok( 'Wx::DemoModules::wxCalendarCtrl' );
use_ok( 'Wx::DemoModules::wxCheckListBox' );
use_ok( 'Wx::DemoModules::wxChoice' );
use_ok( 'Wx::DemoModules::wxClipboard' );
use_ok( 'Wx::DemoModules::wxColourDialog' );
use_ok( 'Wx::DemoModules::wxComboBox' );
use_ok( 'Wx::DemoModules::wxDND' );
use_ok( 'Wx::DemoModules::wxDatePickerCtrl' );
use_ok( 'Wx::DemoModules::wxDirDialog' );
use_ok( 'Wx::DemoModules::wxFileDialog' );
use_ok( 'Wx::DemoModules::wxFlexGridSizer' );
use_ok( 'Wx::DemoModules::wxFontDialog' );
use_ok( 'Wx::DemoModules::wxGauge' );
use_ok( 'Wx::DemoModules::wxGrid' );
use_ok( 'Wx::DemoModules::wxGridCER' );
use_ok( 'Wx::DemoModules::wxGridER' );
use_ok( 'Wx::DemoModules::wxGridSizer' );
use_ok( 'Wx::DemoModules::wxGridTable' );
use_ok( 'Wx::DemoModules::wxHtmlDynamic' );
use_ok( 'Wx::DemoModules::wxHtmlTag' );
use_ok( 'Wx::DemoModules::wxHtmlWindow' );
use_ok( 'Wx::DemoModules::wxListBox' );
use_ok( 'Wx::DemoModules::wxListCtrl' );
use_ok( 'Wx::DemoModules::wxMDI' );

# naughty me...
defined &Wx::MediaCtrl::new || eval 'sub Wx::MediaCtrl::new { }';
# above line tells us in gui if Wx::MediaCtrl is missing
# SKIP below allows us to pass tests if it is missing or 
# has problems - (maybe wxWidgets doesnt have working 
# wxMediaCtrl support)

SKIP: {
    eval { require Wx::Media; };
    skip 'Wx::MediaCtrl load failed: '. $@, 1 if $@;
    use_ok( 'Wx::DemoModules::wxMediaCtrl' );
}

use_ok( 'Wx::DemoModules::wxMultiChoiceDialog' );
use_ok( 'Wx::DemoModules::wxPrinting' );
use_ok( 'Wx::DemoModules::wxProgressDialog' );
use_ok( 'Wx::DemoModules::wxRadioBox' );
use_ok( 'Wx::DemoModules::wxRadioButton' );
use_ok( 'Wx::DemoModules::wxScrollBar' );
use_ok( 'Wx::DemoModules::wxScrolledWindow' );
use_ok( 'Wx::DemoModules::wxSingleChoiceDialog' );
use_ok( 'Wx::DemoModules::wxSlider' );
use_ok( 'Wx::DemoModules::wxSpinButton' );
use_ok( 'Wx::DemoModules::wxSpinCtrl' );
use_ok( 'Wx::DemoModules::wxSplashScreen' );
use_ok( 'Wx::DemoModules::wxStaticBitmap' );
use_ok( 'Wx::DemoModules::wxStaticText' );
use_ok( 'Wx::DemoModules::wxTextEntryDialog' );
use_ok( 'Wx::DemoModules::wxTreeCtrl' );
use_ok( 'Wx::DemoModules::wxValidator' );
use_ok( 'Wx::DemoModules::wxWizard' );
use_ok( 'Wx::DemoModules::wxXrc' );
use_ok( 'Wx::DemoModules::wxXrcCustom' );

[download]

Is this pointing us in any direction?
Is it telling us that the crash has actually occurred inside the use_ok method of Test::More while going:
use_ok( 'Wx::Demo' ); ?

Note that in the OP, the test report says: Failed 50/50 subtests, so does this mean that "use" failed loading each and every demo module?

Update: when going:  perl -e "use Wx::Demo;" I get the same perl.exe crash like in the OP, namely:

Problem Event Name:    APPCRASH
  Application Name:    perl.exe
  Application Version:    0.0.0.0
  Application Timestamp:    513f0ec4
  Fault Module Name:    wxbase294u_gcc_custom.dll
  Fault Module Version:    2.9.4.0
  Fault Module Timestamp:    518e8f2c
  Exception Code:    c0000005
  Exception Offset:    000000000004cc55
  OS Version:    6.1.7600.2.0.0.256.1
  Locale ID:    1033
  Additional Information 1:    1c08
  Additional Information 2:    1c088a33d2f6bb66ead4dd52958c47ec
  Additional Information 3:    9695
  Additional Information 4:    9695d89d136d5b00e97ac68b3cb11b72

[download]

So it seems that the problem is with: wxbase294u_gcc_custom.dll

Can anyone explain what that dll is about, and better yet, how to find the cause of the problem?

In reply to Re^3: wxWidgets link libraries installed by HelenCr
in thread wxPerl: attempting to install Wx::Demo crashes perl.exe by HelenCr

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