smichr/sympy — comment on commit d6f05c98fd245248ad68336ab486739ffca4f4f2
File:  line 0
By smichr:

gcdex's args are self and other; we already know that self is an
Integer -- the check should be whether `other` is an int or long which
will allow us to bypass the sympification step. That's what it used to
be when the arguments were self and b, but when b was changed to
other, Ronan inadvertently changed the b to self in that line.