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Forr rvalues the _Self parameter deduces a non-reference type. Consequently, ((_Self)__self) moved the object to a temporary, which then destroyed on function exit. This patch fixes this by using a C-style cast __self to (const indirect&). This not only resolves the above issue but also correctly handles types that are derived (publicly and privately) from indirect. Allocator requirements in [allocator.requirements.general] p22 guarantee that dereferencing const _M_objp works with equivalent semantics to dereferencing _M_objp. PR libstdc++/121128 libstdc++-v3/ChangeLog: * include/bits/indirect.h (indirect::operator*): Cast __self to approparietly qualified indirect. * testsuite/std/memory/indirect/access.cc: New test. * testsuite/std/memory/polymorphic/access.cc: New test. Reviewed-by: Jonathan Wakely <jwakely@redhat.com> Signed-off-by: Tomasz Kamiński <tkaminsk@redhat.com>
file: libstdc++-v3/README New users may wish to point their web browsers to the file index.html in the 'doc/html' subdirectory. It contains brief building instructions and notes on how to configure the library in interesting ways.