Karthikeyan Singaravelan <tir.kar...@gmail.com> added the comment:

This not reproducible on master and seems to fixed as part of PEP 570 related 
changes. Bisecting gives me d5d2b4546939b98244708e5bb0cfccd55b99d244 . Before 
d5d2b4546939b98244708e5bb0cfccd55b99d244 it produces an internal index error. I 
can reproduce the reported TypeError before PEP 570 was merged. I guess it's 
working perhaps as an unintended effect of the commit and internal error tells 
me it was not tested. Perhaps it's good to add a test for this? Note the change 
in fullargspec output between commits. Adding Pablo who will have better 
context.

➜  cpython git:(d5d2b45469) ./python.exe -c 'import inspect; 
print(inspect.getfullargspec(str.strip)); print(inspect.getcallargs(str.strip, 
"a"))'
/Users/karthikeyansingaravelan/stuff/python/cpython/Lib/inspect.py:1114: 
DeprecationWarning: Use inspect.signature() instead of inspect.getfullargspec()
  warnings.warn("Use inspect.signature() instead of inspect.getfullargspec()",
FullArgSpec(args=['self', 'chars'], varargs=None, varkw=None, defaults=(None,), 
kwonlyargs=[], kwonlydefaults=None, annotations={})
{'self': 'a', 'chars': None}

d5d2b45469~1 commit

➜  cpython git:(81c5a90595) ./python.exe -c 'import inspect; 
print(inspect.getfullargspec(str.strip)); print(inspect.getcallargs(str.strip, 
"a"))'
FullArgSpec(args=[], varargs=None, varkw=None, defaults=(None,), 
posonlyargs=['self', 'chars'], kwonlyargs=[], kwonlydefaults=None, 
annotations={})
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/Users/karthikeyansingaravelan/stuff/python/cpython/Lib/inspect.py", 
line 1365, in getcallargs
    arg2value[posonlyargs[i]] = positional[i]
IndexError: tuple index out of range

----------
nosy: +pablogsal, xtreak

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<https://bugs.python.org/issue36920>
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