[patch] Apply DR434 resolution to <debug/bitset>

[Paolo Carlini]

Paolo Carlini wrote:

>I think something simpler would also do, since there is only *one*
>occurrence, right?
>Right in operator[]:
>   
>    #ifdef _GLIBCXX_DEBUG_PEDANTIC
>        _GLIBCXX_DEBUG_ASSERT(__pos < size())
>    #else
>        _GLIBCXX_DEBUG_ASSERT(__pos <= size())
>    #endif
>  
>
Ah, if you could provide kind of a summary of the tests that currently
are failing in debug mode, would be great! I have trouble figuring out
the best solution, missing that info. Maybe we are going to add
additional macros in debug.h, no idea, right now...

Paolo.