[IronPython] TypeLoadExceptions

Jeff Hardy jdhardy at gmail.com
Tue Jul 8 20:32:54 CEST 2008

Hopefully there's a workaround of some kind, because it makes
debugging pretty painful. Good luck finding the root cause. I've only
been able to hit it in large applications - Django and CherryPy, and
haven't been able to find a minimal reproduction.

On Mon, Jul 7, 2008 at 5:57 PM, Curt Hagenlocher <curt at hagenlocher.org> wrote:
> On Mon, Jul 7, 2008 at 4:46 PM, Jeff Hardy <jdhardy at gmail.com> wrote:
>> On Sun, Jul 6, 2008 at 6:36 AM, Curt Hagenlocher <curt at hagenlocher.org>
>> wrote:
>> > Have you gotten this while not running in the debugger?
>> Hi Curt,
>> I've had a chance to try it without the debugger, and I didn't get a
>> TypeLoadException. I still get some errors, mind you, but they seem to
>> be known issues (namely #15399, which is supposed to be fixed in
>> 2.0b4).
>> Any idea what this means?
> It strongly suggests that there's a bug in the managed debugger.  It seems
> to be triggered by the use of __slots__.  We generate a backing CLR class
> that's templated for Python classes that contain __slots__, and some of
> the methods on the class are themselves templated but with a different
> template argument.  You can still debug the code with an unmanaged debugger
> (ie windbg) but it's a significantly less friendly experience.
> I haven't yet gotten around to reporting this to the managed debug folks, or
> creating a smaller test case.
> --
> Curt Hagenlocher
> curt at hagenlocher.org
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