https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104173
--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Patrick Palka <ppa...@gcc.gnu.org>: https://gcc.gnu.org/g:2a908f3da07c9e94b8a19e966b45daf0140107e8 commit r12-6846-g2a908f3da07c9e94b8a19e966b45daf0140107e8 Author: Patrick Palka <ppa...@redhat.com> Date: Mon Jan 24 09:17:35 2022 -0500 c++: value category of compound object expr [PR104173] Here the call to (the &&-qualified) toLower() is incorrectly rejected during overload resolution because the object expression is encoded as an lvalue when it's really a prvalue. The object expression, instance()->applicationName(), is encoded as an INDIRECT_REF of a COMPOUND_EXPR *(*instance ();, &TARGET_EXPR <D.2383, QCoreApplication::applicationName ()>;); which lvalue_kind deems an lvalue. This issue is similar to PR88103 except that here the original compound object expression is a prvalue rather than an xvalue. The fix there was to adjust the result of unary_complex_lvalue in build_class_member_access_expr so that xvalueness of the original expression is preserved. This patch extends that fix so that rvalueness is preserved more generally. PR c++/104173 gcc/cp/ChangeLog: * typeck.cc (build_class_member_access_expr): Extend unary_complex_lvalue result adjustment to preserve all rvalues, not just xvalues. gcc/testsuite/ChangeLog: * g++.dg/cpp0x/ref-qual21.C: New test.
