Erroneous report of redefined symbol

[Lele Gaifax]

For the following snippet

from bar import bar

def foo():
    pass

class X():
    def foo(self):
        pass

    def bar(self):
        pass

pyflakes reports the following errors:

pp.py:1: 'bar.bar' imported but unused
pp.py:10: redefinition of unused 'bar' from line 1

Note that only imported symbols trigger the problem.