[IronPython] VS2005 Iron Python

Charlie Moad cwmoad at gmail.com
Fri Aug 25 18:35:40 CEST 2006

On 8/25/06, Dino Viehland <dinov at exchange.microsoft.com> wrote:
> Are you running w/ all the bits that came w/ the VS SDK, or are you mixing & matching w/ the latest IronPython?  There may be some issues w/ the latter case but once you get it compiling it usually works.

I have RC2 downloaded, but the reference is using the IP that came
with the VS SDK.  RC2 was in my path, but I removed it and recompiled
just in case.

> 0xc0000005 is the status code for an access violation so it would look like there's a crash in unmanaged code somewhere.  Can you enable native debugging & break on 1st chance AVs?  given that most of the SDK sample code is managed code a crash like this is a little strange, but hopefully w/ a stack trace hopefully someone from our team or the VS SDK team can figure it out.

Forgive me if I provide useless info.  I am a linux/python convert.
Enabling native debugging gives me this error:

Unhandled exception at 0x500af719 in devenv.exe: 0xC0000005: Access
violation reading location 0xfeeefef6.  (I am guessing this is

If I hit "Break" on this error it drops me to the "return" line for
this code from "vswprint.c".

int __cdecl _vsnwprintf_s (
        wchar_t *string,
        size_t sizeInWords,
        size_t count,
        const wchar_t *format,
        va_list ap
    return _vsnwprintf_s_l(string, sizeInWords, count, format, NULL, ap);

From the locals listing it looks like arg "ap" is a null pointer, so
this is probably the culprit.  Here are the other args just in case.

+		string	0x00104004 "ation6\consoleapplication6.sln"	unsigned short *
		sizeInWords	260	unsigned int
		count	58641952	unsigned int
+		format	0x037ece00 "ﻮﻮﻮﻮ"	const wchar_t *
+		ap	0x00000000 <Bad Ptr>	char *

I don't really know how to provide you with a stack trace, but I saw
the option to save a dump.  I am attaching that file.

Let me know if there is something more helpful I can do.

- Charlie
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