[Bug libstdc++/69751] error: call of overloaded 'abs(size_t)' is ambiguous

[martin.gansser at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69751

--- Comment #3 from mgansser at alice dot de <martin.gansser at gmail dot com> 
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many thanks for supporting me, problem was solved.