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[Octave-bug-tracker] [bug #53217] Can't cancel out the popped up window

From: Dan Sebald
Subject: [Octave-bug-tracker] [bug #53217] Can't cancel out the popped up window
Date: Sat, 24 Feb 2018 16:13:54 -0500 (EST)
User-agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:55.0) Gecko/20100101 Firefox/55.0

Follow-up Comment #2, bug #53217 (project octave):

I can't reproduce this.

There are a couple different issues here.  First a "non-bug" is the fact that
you are unable to close the window that appears.  This is simply current
behavior, albeit a limitation, which is that whenever Octave goes into pager
mode (pager mode is the command-line "less"-like environment) it freezes all
else, including graphics.  This has been noted elsewhere throughout the bug

Now, the window that appears is a blank figure.  It may not seem like
"colormap()" without an input should require the presence of a figure, but it
could be that every figure's color map is different (and in fact, individual
axes within figures might now have separate colormaps) so that we need to know
the active figure before we can answer what the colormap is.  In any case,
colormap() all alone might have to open a figure window.

That brings us to the actual bug, which is the

warning: base_graphics_object::get_properties: invalid graphics object
error: unexpected exception while parsing input

Could you be more specific about the version?  What does "hg tip" report for a
changeset number?

Also, perhaps you could try a few things that might better characterize the
issue.  Try first opening the figure and then colormap.  (Perhaps colormap()
is acting before the figure is fully created.)  E.g.,

>> sombrero
>> colormap(gray)
>> figure
>> colormap(jet)
>> sombrero

Maybe turn off the pager and see what happens.

[from a fresh launch]
>> more off
>> colormap()

Things like that.


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