Closed
Description
tail = ['b', 'c']
['a', *tail]Traceback (most recent call last):
File "/usr/local/Cellar/python3/3.5.1/Frameworks/Python.framework/Versions/3.5/lib/python3.5/runpy.py", line 170, in _run_module_as_main
"__main__", mod_spec)
File "/usr/local/Cellar/python3/3.5.1/Frameworks/Python.framework/Versions/3.5/lib/python3.5/runpy.py", line 85, in _run_code
exec(code, run_globals)
File "/usr/local/lib/python3.5/site-packages/mypy/__main__.py", line 5, in <module>
main(None)
File "/usr/local/lib/python3.5/site-packages/mypy/main.py", line 40, in main
res = type_check_only(sources, bin_dir, options)
File "/usr/local/lib/python3.5/site-packages/mypy/main.py", line 81, in type_check_only
options=options)
File "/usr/local/lib/python3.5/site-packages/mypy/build.py", line 177, in build
dispatch(sources, manager)
File "/usr/local/lib/python3.5/site-packages/mypy/build.py", line 1323, in dispatch
process_graph(graph, manager)
File "/usr/local/lib/python3.5/site-packages/mypy/build.py", line 1461, in process_graph
process_stale_scc(graph, scc)
File "/usr/local/lib/python3.5/site-packages/mypy/build.py", line 1538, in process_stale_scc
graph[id].type_check()
File "/usr/local/lib/python3.5/site-packages/mypy/build.py", line 1301, in type_check
manager.type_checker.visit_file(self.tree, self.xpath)
File "/usr/local/lib/python3.5/site-packages/mypy/checker.py", line 152, in visit_file
self.accept(d)
File "/usr/local/lib/python3.5/site-packages/mypy/checker.py", line 201, in accept
typ = node.accept(self)
File "/usr/local/lib/python3.5/site-packages/mypy/nodes.py", line 737, in accept
return visitor.visit_expression_stmt(self)
File "/usr/local/lib/python3.5/site-packages/mypy/checker.py", line 1333, in visit_expression_stmt
self.accept(s.expr)
File "/usr/local/lib/python3.5/site-packages/mypy/checker.py", line 201, in accept
typ = node.accept(self)
File "/usr/local/lib/python3.5/site-packages/mypy/nodes.py", line 1445, in accept
return visitor.visit_list_expr(self)
File "/usr/local/lib/python3.5/site-packages/mypy/checker.py", line 1859, in visit_list_expr
return self.expr_checker.visit_list_expr(e)
File "/usr/local/lib/python3.5/site-packages/mypy/checkexpr.py", line 1283, in visit_list_expr
e)
File "/usr/local/lib/python3.5/site-packages/mypy/checkexpr.py", line 1303, in check_list_or_set_expr
[nodes.ARG_POS] * len(items), context)[0]
File "/usr/local/lib/python3.5/site-packages/mypy/checkexpr.py", line 253, in check_call
messages=arg_messages)
File "/usr/local/lib/python3.5/site-packages/mypy/checkexpr.py", line 677, in check_argument_types
actual + 1, i + 1, callee, context, messages)
File "/usr/local/lib/python3.5/site-packages/mypy/checkexpr.py", line 702, in check_arg
elif not is_subtype(caller_type, callee_type):
File "/usr/local/lib/python3.5/site-packages/mypy/subtypes.py", line 51, in is_subtype
return left.accept(SubtypeVisitor(right, type_parameter_checker))
AttributeError: 'NoneType' object has no attribute 'accept'
*** INTERNAL ERROR ***
unpacking.py:3: error: Internal error -- please report a bug at https://github.com/python/mypy/issues
NOTE: you can use "mypy --pdb ..." to drop into the debugger when this happens.
Related to #704.