[Bug libstdc++/39405] [4.3 regression] std::shared_ptr barfs on incomplete template class that boost::shared_ptr accepts

[paolo dot carlini at oracle dot com]

------- Comment #24 from paolo dot carlini at oracle dot com  2009-03-14 12:06 -------
I agree with your analysis. Can you please open a separate PR about
__is_abstract (which would be a C++ report): currently, we are trying to
complete the types, but we do not error out in case of incompleteness.
Apparently, according to your testcase, in order to obtain a consistent
behaviour we should require completeness (unless array or void), for
__is_abstract and all the other builtins for which it is a precondition.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39405