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TST: csv parser segfaulting on malformed input. #40458

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Merged
jreback merged 4 commits into from
Mar 16, 2021
Merged

TST: csv parser segfaulting on malformed input. #40458

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0c7738e
BUG: add test for closed GH14782
ahawryluk Mar 16, 2021
6510935
Add whatsnew entry
ahawryluk Mar 16, 2021
5e2a50d
Revert "Add whatsnew entry"
ahawryluk Mar 16, 2021
df6c0f3
Merge branch 'master' into old_segfault
ahawryluk Mar 16, 2021
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9 changes: 9 additions & 0 deletions pandas/tests/io/parser/common/test_common_basic.py
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Original file line number Diff line number Diff line change
Expand Up @@ -753,3 +753,12 @@ def test_encoding_surrogatepass(all_parsers):
tm.assert_frame_equal(df, expected)
with pytest.raises(UnicodeDecodeError, match="'utf-8' codec can't decode byte"):
parser.read_csv(path)


def test_malformed_second_line(all_parsers):
# see GH14782
parser = all_parsers
data = "\na\nb\n"
result = parser.read_csv(StringIO(data), skip_blank_lines=False, header=1)
expected = DataFrame({"a": ["b"]})
tm.assert_frame_equal(result, expected)