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mypy crashes with arguments --ignore-missing-imports --follow-imports skip #2778
Description
mypy --ignore-missing-imports --follow-imports skip -m my_module
(py3) user@...$ mypy --ignore-missing-imports --follow-imports skip -m axelrod
Traceback (most recent call last):
File "/home/user/anaconda2/envs/py3/bin/mypy", line 6, in <module>
main(__file__)
File "/home/user/anaconda2/envs/py3/lib/python3.5/site-packages/mypy/main.py", line 42, in main
res = type_check_only(sources, bin_dir, options)
File "/home/user/anaconda2/envs/py3/lib/python3.5/site-packages/mypy/main.py", line 87, in type_check_only
options=options)
File "/home/user/anaconda2/envs/py3/lib/python3.5/site-packages/mypy/build.py", line 183, in build
dispatch(sources, manager)
File "/home/user/anaconda2/envs/py3/lib/python3.5/site-packages/mypy/build.py", line 1526, in dispatch
process_graph(graph, manager)
File "/home/user/anaconda2/envs/py3/lib/python3.5/site-packages/mypy/build.py", line 1652, in process_graph
sccs = sorted_components(graph)
File "/home/user/anaconda2/envs/py3/lib/python3.5/site-packages/mypy/build.py", line 1879, in sorted_components
for ready in topsort(data):
File "/home/user/anaconda2/envs/py3/lib/python3.5/site-packages/mypy/build.py", line 1988, in topsort
for item in set.union(*data.values()) - set(data.keys()):
TypeError: descriptor 'union' of 'set' object needs an argumentRunning the same command with individual files in the module works fine (no crash, type errors caught and reported as expected).
Activity
JukkaL commentedon Jan 31, 2017
I can reproduce this:
gvanrossum commentedon Jan 31, 2017
Aha, the problem is that because of the
--follow-imports=skipit doesn't want to loadbso it ends with an entirely empty graph. The fix will have to involve ensuring that it does follow these kinds of "imports". Stay tuned.gvanrossum commentedon Jan 31, 2017
I think I've got a fix, but I need to devise a test.
gvanrossum commentedon Feb 1, 2017
Closed by #2786.