libstdc++ bootstrap failure after r261525

[Jonathan Wakely]

On 13/06/18 13:42 +0200, Paolo Carlini wrote:
>Hi,
>
>On 13/06/2018 08:11, François Dumont wrote:
>>On 12/06/2018 23:26, Martin Sebor wrote:
>>>Bootstrap fails in libstdc++ with the following error.
>>>I haven't investigated it much except to take a peek
>>>at recent libstdc++ commits where r261525 looks like it
>>>introduced __glibcxx_check_can_increment_range, so it
>>>seems like it might have something to do with it.  I don't
>>>see a __glibcxx_requires_can_increment_range macro defined
>>>anywhere in the patch so maybe it's a typo?  Francois, can
>>>you please see what's going on?
>>>
>>>/opt/notnfs/msebor/build/gcc-86114/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/stl_algobase.h:452:45: 
>>>error: ‘__glibcxx_requires_can_increment_range’ was not declared 
>>>in this scope
>>>Â Â Â Â Â Â  __glibcxx_requires_can_increment_range(__first, __last, 
>>>__result);
>>>
>>>Thanks
>>>Martin
>>>.
>>>
>>I had missed the fact that the patch didn't apply correctly on 
>>include/debug/debug.h as stated in the ChangeLog entry.
>>
>>It is fixed now.
>But even after r261537 we are seeing the regressions:
>
>FAIL: g++.dg/warn/pr31246.C -std=gnu++11 (test for excess errors)
>FAIL: g++.dg/warn/pr31246.C -std=gnu++14 (test for excess errors)
>FAIL: g++.dg/warn/pr31246.C -std=gnu++98 (test for excess errors)
>
>Which definitely are related.

And failing Debug Mode tests:

FAIL: 20_util/hash/84998.cc (test for excess errors)
FAIL: 23_containers/vector/cons/destructible_debug_neg.cc (test for excess errors)
FAIL: 25_algorithms/binary_search/partitioned.cc (test for excess errors)
FAIL: 25_algorithms/equal_range/partitioned.cc (test for excess errors)
FAIL: 25_algorithms/lexicographical_compare/71545.cc (test for excess errors)
FAIL: 25_algorithms/lower_bound/partitioned.cc (test for excess errors)
FAIL: 25_algorithms/upper_bound/partitioned.cc (test for excess errors)
FAIL: ext/profile/mutex_extensions_neg.cc (test for excess errors)

The logs show:

/home/jwakely/src/gcc/build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/stl_algobase.h:452: error: '__can_advance' is not a member of '__gnu_debug'
/home/jwakely/src/gcc/build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/stl_algobase.h:484: error: '__can_advance' is not a member of '__gnu_debug'
/home/jwakely/src/gcc/build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/stl_algobase.h:629: error: '__can_advance' is not a member of '__gnu_debug'
/home/jwakely/src/gcc/build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/stl_algobase.h:664: error: '__can_advance' is not a member of '__gnu_debug'