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There are several places where the handling of a variable declaration depends on whether it corresponds to a compiler temporary, or to some other entity. We were testing that var decls were artificial in determining this. However, proxy vars are also artificial so that this is not sufficient. The solution is to exclude variables with a DECL_VALUE_EXPR as well, since the value variable will not be a temporary. gcc/cp/ChangeLog: 2020-04-30 Iain Sandoe <iain@sandoe.co.uk> PR c++/94879 * coroutines.cc (build_co_await): Account for variables with DECL_VALUE_EXPRs. (captures_temporary): Likewise. (register_awaits): Likewise. gcc/testsuite/ChangeLog: 2020-04-30 Iain Sandoe <iain@sandoe.co.uk> PR c++/94879 * g++.dg/coroutines/pr94879-folly-1.C: New test.
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