[libcxx-commits] [clang] [libcxx] [Clang][Sema][Coroutines] Make coroutine startup exception-safe (CWG2935) Part2 (PR #179192)

[Chuanqi Xu via libcxx-commits]

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@@ -12755,6 +12755,12 @@ def warn_coroutine_handle_address_invalid_return_type : Warning <
 def err_coroutine_promise_final_suspend_requires_nothrow : Error<
   "the expression 'co_await __promise.final_suspend()' is required to be non-throwing"
 >;
+def warn_coroutine_promise_initial_suspend_throw
+    : Warning<"a potentially throwing 'co_await __promise.initial_suspend()' "
+              "may disable heap allocation elision; "
+              "if it throws, the coroutine return value and state are "
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ChuanqiXu9 wrote:

We don't need the sentence.

https://github.com/llvm/llvm-project/pull/179192