[Octave-bug-tracker] [bug #66617] structfun assumes output arguments for invoked command

[Fernando]

Follow-up Comment #9, bug #66617 (group octave):

There's another case where Matlab result differs slightly from Octave, and the
patch I submitted also eliminates the discrepancy. 

In Octave (without the patch), the following two calls to structfun return the
same:


octave:> x=struct;
octave:> structfun(@(z)z,x)
ans = [](0x1)
octave:> y=structfun(@(z)z,x)
y = [](0x1)


while in Matlab (or Octave with the patch), the first call returns nothing:


>> x=struct;
>> structfun(@(z)z,x)
>> y=structfun(@(z)z,x)
y = [](0x1)


I updated the patch with a couple of tests for that case.

(file #56737)

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