[bug #36576] invalid graphics object

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Follow-up Comment #1, bug #36576 (project octave):

This is the same error that Jose posted Jun 1
this simple script shows the error
from Jose

----
clf;
[X,Y] = meshgrid(-2:.2:2, -2:.2:2);Z = X .* exp(-X.^2 - Y.^2);
mesh(X,Y,Z,'linewidth',1);axis('equal');colorbar;hold on;
imagesc(X,Y,Z);colorbar;
---

 have confirmed this on 3.7.0+ and 3.6.1 and 3.2.3
the error message is
error: base_graphics_object:: get_properties: invalid graphics object

It seems to be the second call to colorbar that shows it, but not always.

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