[libcxx-commits] [libcxx] [libc++] Don't try to wait on a thread that hasn't started in std::async (PR #125433)

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asmok-g wrote:

There are other instances to the problem like the one [kadircet](https://github.com/kadircet) described in clangd. Sjould we consider reverting the patch ?

https://github.com/llvm/llvm-project/pull/125433