Message 111952 - Python tracker

The error happens when Null is passed to strlen in (unicodeobject.c, line 860)

Passing NULL to a string format function is probably in the category of don't do that.

Stefans solution of checking for NULL before calling PyErr_Format looks to me to be correct.  As he notes, the same technique is used in another place.

It might be good to add a note somewhere not to pass NULL to C string format functions.