[Python-ideas] SyntaxWarning for for/while/else without break or return?

[Stephen J. Turnbull]

Arnaud Delobelle writes:

 > Also, it would be odd to have a language feature that generates a  
 > warning whenever it is used :)

Not really.  Deprecation warnings behave that way.  AFAICS, a
deprecation warning is just the extreme case of a syntax warning.