yield in loop confuses branch coverage

[nedbat]

def gen(inp):
    for n in inp:
        yield (i * 2 for i in range(n))

list(gen([1,2,3]))

Running this with --branch gives strange results. "2 partial branches", but only line 3 is marked, and it's marked with "2 exit".

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• Bitbucket: https://bitbucket.org/ned/coveragepy/issue/324

[nedbat]

Original comment by Mickie Betz (Bitbucket: mbetz08, GitHub: mbetz08)

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I was able to reproduce the issue with the input above. Here's the report output:

Name Stmts Miss Branch BrPart Cover Missing

issue-324.py 4 0 4 2 75% 5->-5, 5->4

The html output looks like:

[nedbat]

Fixed in 2e992bf44abaf0d3c78134a4eb9724f015d23e00 (bb)