t/middleware/connect.t ....... 
Dubious, test returned 5 (wstat 1280, 0x500)
All 1 subtests passed 
Free to wrong pool 2e8aa90 not 6c4040 at C:/strawberry-perl-5.12.2.0/perl/site/lib/AnyEvent/HTTP.pm line 1083, <> line 6.
t/middleware/loadbalancer.t .. 
Dubious, test returned 5 (wstat 1280, 0x500)
No subtests run 
Free to wrong pool 2e145e0 not 34f90 at C:/strawberry-perl-5.12.2.0/perl/site/lib/AnyEvent/HTTP.pm line 1083, <> line 6.
t/middleware/rewrite.t ....... 
Dubious, test returned 5 (wstat 1280, 0x500)
No subtests run 

##</code><code>##

#define EIO             5

##</code><code>##

C:\perl521\bin>perl -E"$! = 5; say $!"
Input/output error

##</code><code>##

C:\perl521\srcnewb4opt>perl -Ilib crashtest.pl
disable_interrupts $? 9600 CHILD_ERROR_NATIVE 9600
illegal_instruction $? 1d00 CHILD_ERROR_NATIVE 1d00
deref_null $? 500 CHILD_ERROR_NATIVE 500
deref_neg1 $? 500 CHILD_ERROR_NATIVE 500
write_to_ro_mem $? 500 CHILD_ERROR_NATIVE 500
div_by_0 $? 9400 CHILD_ERROR_NATIVE 9400
call_c_debugger $? 300 CHILD_ERROR_NATIVE 300

C:\perl521\srcnewb4opt>

##</code><code>##

From 67329fe8a4f5c4a606b9da4af955eed9e63b4698 Mon Sep 17 00:00:00 2001
From: Daniel Dragan <bulk88@hotmail.com>
Date: Sun, 28 Dec 2014 22:21:47 -0500
Subject: [PATCH] add intentional crashing tests

---
 crashtest.pl              |   12 ++++++++
 ext/XS-APItest/APItest.xs |   66 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 78 insertions(+), 0 deletions(-)
 create mode 100644 crashtest.pl

diff --git a/crashtest.pl b/crashtest.pl
new file mode 100644
index 0000000..98902d1
--- /dev/null
+++ b/crashtest.pl
@@ -0,0 +1,12 @@
+use Win32API::File;
+
+sub runtest {
+my $fn = shift;
+my $r = system(1, 'perl -Ilib -MXS::APItest -E"XS::APItest::'.$fn.'()"');
+my $p = wait();
+printf($fn.' $? %x CHILD_ERROR_NATIVE %x'."\n", $?, ${^CHILD_ERROR_NATIVE});
+}
+
+Win32API::File::SetErrorMode(Win32API::File::SEM_NOGPFAULTERRORBOX());
+runtest($_) foreach(qw(disable_interrupts illegal_instruction deref_null
+                    deref_neg1 write_to_ro_mem div_by_0 call_c_debugger));
diff --git a/ext/XS-APItest/APItest.xs b/ext/XS-APItest/APItest.xs
index 9f7ecf2..75ebe8e 100644
--- a/ext/XS-APItest/APItest.xs
+++ b/ext/XS-APItest/APItest.xs
@@ -4,6 +4,15 @@
 #include "XSUB.h"
 #include "fakesdio.h"   /* Causes us to use PerlIO below */
 
+#ifdef WIN32
+#  include "dos.h"
+#  pragma intrinsic(_disable)
+#pragma code_seg(push, ".text")
+/* 0x0F 0x0B UD2 ins, 0xC3 retn ins, VC 64 doesnt support inline asm */
+__declspec(allocate(".text")) U8 ud2_ins[3] = { 0x0F, 0x0B, 0xC3 };
+#pragma code_seg()
+#endif
+
 typedef SV *SVREF;
 typedef PTR_TBL_t *XS__APItest__PtrTable;
 
@@ -3819,6 +3828,63 @@ test_newOP_CUSTOM()
     OUTPUT:
 	RETVAL
 
+#ifdef WIN32
+void
+disable_interrupts()
+PPCODE:
+    /* disabling interrupts is illegal from user mode, causes EXCEPTION_PRIV_INSTRUCTION */
+    _disable();
+
+void
+illegal_instruction()
+PREINIT:
+    void (*fud2)() = (void (*)()) ud2_ins;
+PPCODE:
+    fud2();
+
+void
+call_c_debugger()
+PPCODE:
+    DebugBreak();
+
+#endif
+
+void
+deref_null()
+PREINIT:
+    int *nowhere = NULL;
+PPCODE:
+    *nowhere = 0;
+
+void
+deref_neg1()
+PREINIT:
+    int *nowhere = (int*)(SSize_t)-1;
+PPCODE:
+    *nowhere = 0;
+
+void
+write_to_ro_mem()
+PREINIT:
+    int *nowhere = (int*)PL_no_aelem;
+PPCODE:
+    *nowhere = 0;
+
+UV
+div_by_0(...)
+PREINIT:
+    UV divisor;
+CODE:
+    /* defeat CC optimizer */
+    if(items >= 1)
+        divisor = SvUV(ST(0));
+    else
+        divisor = 0;
+    RETVAL = 1 / divisor;
+OUTPUT:
+    RETVAL
+
+
 MODULE = XS::APItest PACKAGE = XS::APItest::AUTOLOADtest
 
 int
-- 
1.7.9.msysgit.0