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BUG: Groupby.quantile segfaults for quantile > 1 #27470

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ghost opened this issue Jul 19, 2019 · 2 comments · Fixed by #27826
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BUG: Groupby.quantile segfaults for quantile > 1 #27470

ghost opened this issue Jul 19, 2019 · 2 comments · Fixed by #27826
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Groupby Segfault Non-Recoverable Error
Milestone
0.25.1

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@ghost
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ghost commented Jul 19, 2019

Adding tests for #27467 surfaced some bugs:

from pandas import *
df = DataFrame(dict(a=[0, 0, 0, 1, 1, 1], b=range(6)))
g = df.groupby(np.repeat([0,1], 3))
# ok
g.quantile(50)
<segfault>

quantile accepts floats in [0,1] or arrays of floats. It appears not to validate the range though.
@ghost ghost mentioned this issue Jul 19, 2019
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@jbrockmendel
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Apparently this is platform specific. Works fine for me on OSX with numpy 1.16.4, segfaults on Ubuntu 18.04 with numpy 1.16.2

@jbrockmendel jbrockmendel added the Segfault Non-Recoverable Error label Jul 19, 2019
@ghost
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ghost commented Jul 19, 2019

Thanks for investigating

@jreback jreback added this to the 0.25.1 milestone Jul 24, 2019
@ghost ghost mentioned this issue Jul 24, 2019
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TomAugspurger added a commit to TomAugspurger/pandas that referenced this issue Aug 8, 2019
@TomAugspurger
BUG: Fix groupby quantile segfault
cf73797 
Validate that q is between 0 and 1.

Closes pandas-dev#27470
@TomAugspurger TomAugspurger mentioned this issue Aug 8, 2019
Merged
jbrockmendel pushed a commit that referenced this issue Aug 12, 2019
@TomAugspurger @jbrockmendel
BUG: Fix groupby quantile segfault (#27826)
9fd432b 
* BUG: Fix groupby quantile segfault

Validate that q is between 0 and 1.

Closes #27470

* prettier
quintusdias pushed a commit to quintusdias/pandas_dev that referenced this issue Aug 16, 2019
@TomAugspurger @quintusdias
BUG: Fix groupby quantile segfault (pandas-dev#27826)
a7dae1a 
* BUG: Fix groupby quantile segfault

Validate that q is between 0 and 1.

Closes pandas-dev#27470

* prettier
WillAyd pushed a commit to WillAyd/pandas that referenced this issue Oct 31, 2019
@TomAugspurger @WillAyd
Backport PR pandas-dev#27826 for 0.25.3 release
31260be 
* BUG: Fix groupby quantile segfault

Validate that q is between 0 and 1.

Closes pandas-dev#27470

* prettier
jreback pushed a commit that referenced this issue Oct 31, 2019
@WillAyd @jreback
Backports for 0.25.3 (#29313)
60185e1 
* Backport PR #27826 for 0.25.3 release

* BUG: Fix groupby quantile segfault

Validate that q is between 0 and 1.

Closes #27470

* prettier

* Backport PR #29173 for 0.25.3 release

* Backport PR #29296 for 0.25.3 release

* Backport PR #29294 for 0.25.3 whatsnew
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Groupby Segfault Non-Recoverable Error
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@jreback @jbrockmendel