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[Octave-bug-tracker] [bug #54431] GUI crashes in execution of script usi

From: Mike Miller
Subject: [Octave-bug-tracker] [bug #54431] GUI crashes in execution of script using control tf objects
Date: Thu, 2 Aug 2018 15:32:55 -0400 (EDT)
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:61.0) Gecko/20100101 Firefox/61.0

Update of bug #54431 (project octave):

              Item Group:                    None => Segfault, Bus Error, etc.
                  Status:               Need Info => Confirmed              
                 Summary: Octave gui crashes (possibly graphic problem) => GUI
crashes in execution of script using control tf objects


Follow-up Comment #5:

If I run the script with 'echo on', the error occurs at line 45, the first
call to zp2tf, which may have something to do with the error.

The zp2tf function instantiates a temporary tf object and calls tfdata on it.
This is in addition to the 'tf' object 'SYS_c' that already exists at the
script top level.

The crash trace involves the following on my system

#50 0x00007f8e652ae329 in octave::tree_statement_list::accept (tw=...,
this=<optimized out>) at ../libinterp/parse-tree/pt-stmt.h:190
#51 octave_user_function::call (this=0x7f8e08564270, tw=..., nargout=1,
_args=...) at ../libinterp/octave-value/ov-usr-fcn.cc:652
#52 0x00007f8e6533a43d in octave::feval (fcn=0x7f8e08564270, args=...,
address@hidden) at libinterp/parse-tree/oct-parse.yy:5229
#53 0x00007f8e651daf22 in octave_class::size (this=0x7f8e085c3f90) at
#54 0x00007f8e65ecf65f in octave_value::size (this=0x7fff7b39ebe0) at
#55 octave::workspace_model::update_table (this=0x558236c4e820) at

where the object whose size is being evaluated is a 'tf' object.


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