[issue21168] unicodeobject.c: likely type-punning may break strict-aliasing rules

[STINNER Victor]

STINNER Victor added the comment:

The warning comes from the make_bloom_mask() call below. make_bloom_mask() is called with kind=PyUnicode_2BYTE_KIND (Py_UCS2), whereas the gcc waring is about Py_UCS4. It looks like a false positive.


static BLOOM_MASK bloom_linebreak = ~(BLOOM_MASK)0;

...

    Py_UCS2 linebreak[] = {
        ...
    };

    /* initialize the linebreak bloom filter */
    bloom_linebreak = make_bloom_mask(
        PyUnicode_2BYTE_KIND, linebreak,
        Py_ARRAY_LENGTH(linebreak));

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<http://bugs.python.org/issue21168>
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