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# NumPy 1.9.1 Release Notes

This is a bugfix only release in the 1.9.x series.

## Issues fixed

- gh-5184: restore linear edge behaviour of gradient to as it was in < 1.9. The second order behaviour is available via the edge_order keyword

- gh-4007: workaround Accelerate sgemv crash on OSX 10.9

- gh-5100: restore object dtype inference from iterable objects without len()

- gh-5163: avoid gcc-4.1.2 (red hat 5) miscompilation causing a crash

- gh-5138: fix nanmedian on arrays containing inf

- gh-5240: fix not returning out array from ufuncs with subok=False set

- gh-5203: copy inherited masks in MaskedArray.__array_finalize__

- gh-2317: genfromtxt did not handle filling_values=0 correctly

- gh-5067: restore api of npy_PyFile_DupClose in python2

- gh-5063: cannot convert invalid sequence index to tuple

- gh-5082: Segmentation fault with argmin() on unicode arrays

- gh-5095: don’t propagate subtypes from np.where

- gh-5104: np.inner segfaults with SciPy’s sparse matrices

- gh-5251: Issue with fromarrays not using correct format for unicode arrays

- gh-5136: Import dummy_threading if importing threading fails

- gh-5148: Make numpy import when run with Python flag ‘-OO’

- gh-5147: Einsum double contraction in particular order causes ValueError

- gh-479: Make f2py work with intent(in out)

- gh-5170: Make python2 .npy files readable in python3

- gh-5027: Use ‘ll’ as the default length specifier for long long

- gh-4896: fix build error with MSVC 2013 caused by C99 complex support

- gh-4465: Make PyArray_PutTo respect writeable flag

- gh-5225: fix crash when using arange on datetime without dtype set

- gh-5231: fix build in c99 mode