[compiler-rt] TSAN: Report when thread is not live and referenced in pthread (PR #156921)

[Dmitry Vyukov via llvm-commits]

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@@ -0,0 +1,18 @@
+// RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
+
+#include <pthread.h>
+#include <stdio.h>
+
+void *fn(void *) { return NULL; }
+
+int main() {
+  pthread_t th;
+  int rc = pthread_create(&th, 0, fn, 0);
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dvyukov wrote:

What did I say? I have no memory of that... Data races are also UB...

https://github.com/llvm/llvm-project/pull/156921