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anntzer opened this issue Dec 11, 2015 · 2 comments
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setting entry in struct array with object field #6806

anntzer opened this issue Dec 11, 2015 · 2 comments
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50 - Duplicate component: numpy.ma masked arrays

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@anntzer
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anntzer commented Dec 11, 2015 
In [23]: a = np.ones(3, 'i4, O')

In [24]: a[0] = a[1]
---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-24-5ef5a6077ce6> in <module>()
----> 1 a[0] = a[1]

ValueError: Setting void-array with object members using buffer.

numpy 1.10.1
First reported by @ldoddema in #6776.
@ahaldane
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This is an old bug present in 1.9.3 (or before). It happens because of the behavior of structured item assignemt (in VOID_setitem), which treats the lhs as a buffer. This causes a number of known bugs.

A possible fix to this is implemented in #6053. (See links there for related bugs)

@charris
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charris commented Dec 11, 2015

Closing as duplicate.

@charris charris closed this as completed Dec 11, 2015
@ahaldane ahaldane mentioned this issue Nov 16, 2017
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