New submission from Jeff Kaufman <[email protected]>:
With python built at HEAD (c51d8c9b) and at 3.7b3 (fcd4e03e08) the code:
import difflib
for fromdata, todata, flag in difflib._mdiff(
["2"], ["3"], 1):
pass
produces:
Traceback (most recent call last):
File "/home/jefftk/cpython/Lib/difflib.py", line 1638, in _mdiff
from_line, to_line, found_diff = next(line_pair_iterator)
StopIteration
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/home/jefftk/icdiff/repro.py", line 3, in <module>
["2"], ["3"], 1):
RuntimeError: generator raised StopIteration
In python 3.5 and 3.6 I don't get an error.
This is probably due to https://bugs.python.org/issue32670 which implements PEP
479, but I this this isn't supposed to happen in library code?
----------
components: Library (Lib)
messages: 314936
nosy: Jeff.Kaufman
priority: normal
severity: normal
status: open
title: "RuntimeError: generator raised StopIteration" in difflib.mdiff
type: behavior
versions: Python 3.7
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Python tracker <[email protected]>
<https://bugs.python.org/issue33224>
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