New string assignment behavior with 3.0.3

[Orion Poplawski]

With 3.0.1:

octave:3> t = ""
t =
octave:4> t(1,:) = ""
t =

With 3.0.3:

octave:1> t=""
t =
octave:2> t(1,:) = ""
error: A(idx) = []: index out of range
error: assignment failed, or no method for `string = string'
error: evaluating assignment expression near line 2, column 8

Intentional?  Bug?

Please CC me on replies.

- Orion