[Octave-bug-tracker] [bug #50893] for loop index variable not initialized unless loop is entered

[Rik]

Follow-up Comment #3, bug #50893 (project octave):

More clues that this is specific to the range operator which is optimized for
space storage in Octave, but not Matlab.  If I disable Octave's efficient
range implementation then the behavior is Matlab compatible.


octave:1> disable_range (true)
octave:2> disable_range 
ans = 1
octave:3> for k = 1:0
> disp (k);
> end
octave:4> whos
Variables in the current scope:

   Attr Name        Size                     Bytes  Class
   ==== ====        ====                     =====  ===== 
        ans         1x1                          1  logical

Total is 1 element using 1 byte

octave:5> clear k
octave:6> disable_range (false)
octave:7> for k = 1:0
> disp (k);
> end
octave:8> whos
Variables in the current scope:

   Attr Name        Size                     Bytes  Class
   ==== ====        ====                     =====  ===== 
        ans         1x1                          1  logical

Total is 1 element using 1 byte





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