On Sat, 25 Apr 2015, Marek Polacek wrote:

> +             pedwarn (location, OPT_Wshift_negative_value,
> +                      "left shift of negative value");

Use of pedwarn is always suspect for something only undefined at runtime; 
it must not produce an error with -pedantic-errors in any context where a 
constant expression is not required.

-- 
Joseph S. Myers
jos...@codesourcery.com

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