Iain Sandoe
2466a8d0dd
The way in which a C++20 coroutine is specified discards any value that might be returned from the initial or final await expressions. This ICE was caused by an initial await expression with an await_resume () returning a reference, the function rewrite code was not set up to expect this. Fixed by looking through any indirection present and by explicitly discarding the value, if any, returned by await_resume(). It does not seem useful to make a diagnostic for this, since the user could define a generic awaiter that usefully returns values when used in a different position from the initial (or final) await expressions. Signed-off-by: Iain Sandoe <iain@sandoe.co.uk> PR c++/100127 gcc/cp/ChangeLog: * coroutines.cc (coro_rewrite_function_body): Handle initial await expressions that try to produce a reference value. gcc/testsuite/ChangeLog: * g++.dg/coroutines/pr100127.C: New test.
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