pytest Once the process launches, simply type run and the test suite will begin, stopping at any segmentation fault that may occur. 4.9.2 Checking memory leaks with valgrind You can use Valgrind to check with a MultiIndex (GH47649) • Fixed regression in taking NULL objects from a DataFrame causing a segmentation violation. These NULL values are created by numpy.empty_like() (GH46848) • Fixed regression in fill_value is absent, freq is ignored (GH47039) • Fixed regression in DataFrame.to_json() causing a segmentation violation when DataFrame is created with an index parameter of the type PeriodIndex (GH46683)

pytest Once the process launches, simply type run and the test suite will begin, stopping at any segmentation fault that may occur. 4.7.2 Checking memory leaks with valgrind You can use Valgrind to check with MultiIndex (GH47649) • Fixed regression in taking NULL objects from a DataFrame causing a segmentation violation. These NULL values are created by numpy.empty_like() (GH46848) • Fixed regression in fill_value is absent, freq is ignored (GH47039) • Fixed regression in DataFrame.to_json() causing a segmentation violation when DataFrame is created with an index parameter of the type PeriodIndex (GH46683)

pytest Once the process launches, simply type run and the test suite will begin, stopping at any segmentation fault that may occur. 4.9.2 Checking memory leaks with valgrind You can use Valgrind to check of the passed dict (GH44091) • Bug in Timestamp hashing during some DST transitions caused a segmentation fault (GH33931 and GH40817) Timedelta • Bug in division of all-NaT TimeDeltaIndex, Series or rank() method failing for read-only data (GH37290) • Fixed regression in RollingGroupby causing a segmentation fault with Index of dtype object (GH36727) • Fixed regression in DataFrame.resample(...).apply(

pytest Once the process launches, simply type run and the test suite will begin, stopping at any segmentation fault that may occur. 4.9.2 Checking memory leaks with valgrind You can use Valgrind to check rank() method failing for read-only data (GH37290) • Fixed regression in RollingGroupby causing a segmentation fault with Index of dtype object (GH36727) • Fixed regression in DataFrame.resample(...).apply( (GH32426) • Bug in DataFrame.count() with level="foo" and index level "foo" containing NaNs causes segmentation fault (GH21824) • Bug in DataFrame.diff() with axis=1 returning incorrect results with mixed

pytest Once the process launches, simply type run and the test suite will begin, stopping at any segmentation fault that may occur. 4.9.2 Checking memory leaks with valgrind You can use Valgrind to check rank() method failing for read-only data (GH37290) • Fixed regression in RollingGroupby causing a segmentation fault with Index of dtype object (GH36727) • Fixed regression in DataFrame.resample(...).apply( (GH32426) • Bug in DataFrame.count() with level="foo" and index level "foo" containing NaNs causes segmentation fault (GH21824) • Bug in DataFrame.diff() with axis=1 returning incorrect results with mixed

pytest Once the process launches, simply type run and the test suite will begin, stopping at any segmentation fault that may occur. 4.6.2 Checking memory leaks with valgrind You can use Valgrind to check rank() method failing for read-only data (GH37290) • Fixed regression in RollingGroupby causing a segmentation fault with Index of dtype object (GH36727) • Fixed regression in DataFrame.resample(...).apply( Dataframe (GH31251) • Bug in read_excel() where a UTF-8 string with a high surrogate would cause a segmentation violation (GH23809) • Bug in read_csv() was causing a file descriptor leak on an empty file (GH31488)

pytest Once the process launches, simply type run and the test suite will begin, stopping at any segmentation fault that may occur. 4.9. Debugging C extensions 2665 pandas: powerful Python data analysis rank() method failing for read-only data (GH37290) • Fixed regression in RollingGroupby causing a segmentation fault with Index of dtype object (GH36727) • Fixed regression in DataFrame.resample(...).apply( Dataframe (GH31251) • Bug in read_excel() where a UTF-8 string with a high surrogate would cause a segmentation violation (GH23809) • Bug in read_csv() was causing a file descriptor leak on an empty file (GH31488)

pytest Once the process launches, simply type run and the test suite will begin, stopping at any segmentation fault that may occur. 4.6.2 Checking memory leaks with valgrind You can use Valgrind to check rank() method failing for read-only data (GH37290) • Fixed regression in RollingGroupby causing a segmentation fault with Index of dtype object (GH36727) • Fixed regression in DataFrame.resample(...).apply( Dataframe (GH31251) • Bug in read_excel() where a UTF-8 string with a high surrogate would cause a segmentation violation (GH23809) • Bug in read_csv() was causing a file descriptor leak on an empty file (GH31488)

Dataframe (GH31251) • Bug in read_excel() where a UTF-8 string with a high surrogate would cause a segmentation violation (GH23809) • Bug in read_csv() was causing a file descriptor leak on an empty file (GH31488) keys of which some were categorical and others not (GH32494) • Bug in GroupBy.count() causes segmentation fault when grouped-by columns contain NaNs (GH32841) • Bug in DataFrame.groupby() and Series an error (GH26342). • Bug in DataFrame constructor when passing non-empty tuples would cause a segmentation fault (GH25691) • Bug in Series.apply() failed when the series is a timezone aware DatetimeIndex

Dataframe (GH31251) • Bug in read_excel() where a UTF-8 string with a high surrogate would cause a segmentation violation (GH23809) • Bug in read_csv() was causing a file descriptor leak on an empty file (GH31488) keys of which some were categorical and others not (GH32494) • Bug in GroupBy.count() causes segmentation fault when grouped-by columns contain NaNs (GH32841) • Bug in DataFrame.groupby() and Series an error (GH26342). • Bug in DataFrame constructor when passing non-empty tuples would cause a segmentation fault (GH25691) • Bug in Series.apply() failed when the series is a timezone aware DatetimeIndex