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[Octave-bug-tracker] [bug #53858] Octave crashes when expanding an array

From: Rik
Subject: [Octave-bug-tracker] [bug #53858] Octave crashes when expanding an array of a sub-structure viewed by Variable Editor
Date: Fri, 8 Feb 2019 12:28:37 -0500 (EST)
User-agent: Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; rv:11.0) like Gecko

Follow-up Comment #7, bug #53858 (project octave):

The original example still creates an endless loop for me.

I can understand what is going on, but don't have a fix just yet.  When the
variable editor windows are first set up a.b is a scalar struct, and the
sub-window is displaying 'a.b.e'.  When the code

a.b(2).c = 'string';

is executed the class of a.b changes from scalar struct to struct array. 
Therefore, 'a.b.e' now returns a cell array equivalient to 'a.b(:).e'.  The
Variable Editor is not expecting a cell array and throws errors.

If you then close the 'a.b.e' tab, and re-open it by double-clicking on the
original entry, it showes 'a.b(1).e'.

So, when the class changes we need to reflect that in the indexing expression


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