[Octave-bug-tracker] [bug #65228] matlab for loops on empty row vector

[John W. Eaton]

Follow-up Comment #2, bug#65228 (group octave):

Yes, please see comment #6 of bug #50893 where Rik wrote


When an object has columns, but no rows, Octave iterates over the columns
while Matlab does not iterate.  Sample code [...]


Was that incorrect, or did Matlab behavior behavior change recently?


I think the fix would be quite simple:


diff --git a/libinterp/parse-tree/pt-eval.cc
b/libinterp/parse-tree/pt-eval.cc
--- a/libinterp/parse-tree/pt-eval.cc
+++ b/libinterp/parse-tree/pt-eval.cc
@@ -3187,7 +3187,7 @@ tree_evaluator::visit_simple_for_command
       if (rhs.ndims () > 2)
         arg = arg.reshape (dv);
 
-      if (nrows > 0 && steps > 0)
+      if (steps > 0)
         {
           octave_value_list idx;
           octave_idx_type iidx;


Whether or not this is a recent change in behavior, but especially if it is,
could someone verify the other behavior noted in comment #6 of bug #50893?


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