[Octave-bug-tracker] [bug #60791] classdef subsasgn / subsref called incorrectly

[Fernando]

Follow-up Comment #2, bug #60791 (project octave):

I had a look at the issue and I found the cause. In the sequence of
instructions:

T1 = rdz_table(1);
cls = @rdz_table;
T2 = rdz_table(2);

when executing 

cls = @rdz_table;

the definition of the class constructor is not found, although it should, and
the class is loaded again. This causes problems later, because now there are
two rdz_table classes loaded, and octave thinks they are different.

Why is the class constructor not found? When executing

T1 = rdz_table(1);

the class constructor is loaded from the file, and the octave_value
representing the constructor is stored in the class_constructors member of a
fnc_info_rep object (method fcn_info::fcn_info_rep::load_class_constructor in
file fcn-info.cc). It is also temporarily stored in the function_on_path
member of the same fnc_info_rep object, but then the function_on_path is
restored to its previous value.

I don't understand why function_on_path is restored. I tried to eliminate the
restoring, and I found that it eliminates the problem, while also passing all
the tests. I attach the proposed patch.


(file #52570)
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Additional Item Attachment:

File name: bug60791.patch                 Size:1 KB
    <https://file.savannah.gnu.org/file/bug60791.patch?file_id=52570>



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