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FIX: Prevent crash when removing a subfigure containing subplots #31323

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Merged
rcomer merged 2 commits into from
Mar 27, 2026
+6 −3
Merged

FIX: Prevent crash when removing a subfigure containing subplots #31323

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702b429
FIX: Prevent crash when removing a subfigure containing subplots
Vikash-Kumar-23 Mar 18, 2026
270287d
Use attribute-based guard in Artist.remove
Vikash-Kumar-23 Mar 18, 2026
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8 changes: 5 additions & 3 deletions lib/matplotlib/artist.py
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Original file line number Diff line number Diff line change
Expand Up @@ -255,10 +255,12 @@ def remove(self):
# clear stale callback
self.stale_callback = None
_ax_flag = False
if hasattr(self, 'axes') and self.axes:
ax = getattr(self, 'axes', None)
mouseover_set = getattr(ax, '_mouseover_set', None)
if mouseover_set is not None:
# remove from the mouse hit list
self.axes._mouseover_set.discard(self)
self.axes.stale = True
mouseover_set.discard(self)
ax.stale = True
self.axes = None # decouple the artist from the Axes
_ax_flag = True

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1 change: 1 addition & 0 deletions lib/matplotlib/tests/test_figure.py
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Expand Up @@ -1575,6 +1575,7 @@ def test_subfigures_wspace_hspace():
def test_subfigure_remove():
fig = plt.figure()
sfs = fig.subfigures(2, 2)
sfs[1, 1].subplots()
sfs[1, 1].remove()
assert len(fig.subfigs) == 3

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