r183883 - Implement core issue 903: only integer literals with value 0 and prvalues of

[Jordan Rose]

On Jun 17, 2013, at 11:04 , Richard Smith <richard at metafoo.co.uk> wrote:

> On Mon, Jun 17, 2013 at 9:38 AM, Jordan Rose <jordan_rose at apple.com> wrote:
>> *sigh* I can't say this is the wrong thing to do—in fact, it's the kind of restriction I usually like—but for the record this breaks OS X's (ancient) libstdc++ implementation of <tr1/unordered_map> when compiling under -std=c++11. I don't think that's such an important configuration, though.
> 
> That's unfortunate. I assume this is the <tr1/unordered_map> from
> g++-4.2? What exotic mechanism is it using to write a null pointer
> constant?

"return false"

...yeah. Yuck. It's probably a copy-paste bug that just never got caught. libstdc++ version 4.2.1, with whatever tweaks we've been adding over the last n OS X releases.

Jordan