[Octave-bug-tracker] [bug #57391] graphics callback error after two consecutive calls to "stem"

[Pantxo Diribarne]

Update of bug #57391 (project octave):

                  Status:                    None => Confirmed              
                 Summary: graphics callback error with legend and stem plot =>
graphics callback error after two consecutive calls to "stem"

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Follow-up Comment #1:

I can reproduce the issue, but I am happy to say that legend has nothing to do
with it, for once :-)! Two consecutive calls to stem are enough.

I live with a patch that makes Octave print error messages in graphics
callbacks and here is what I see:


octave:1> plot (rand (3, 6))
octave:2> stem (1:10)
octave:3> stem (1:10)
execution error in graphics callback function:
error: get: invalid handle (= -37.8902)
error: called from
    __stem__>update_xlim at line 366 column 9
    delete at line 60 column 5
    newplot at line 202 column 11
    __stem__ at line 45 column 9
    stem at line 127 column 8


The regression seems to have been introduced between 4.2 (works) and Octave
5.1 (doesn't).

Re-titling report to better describe the issue.


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