Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/compiler-rt/test/asan/TestCases/Posix/freopen.cc

@@ -0,0 +1,15 @@
+// RUN: %clangxx_asan -O0 %s -o %t && %run %t
+
+// This fails on i386 Linux due to a glibc versioned symbols mixup.
+// REQUIRES: asan-64-bits
+
+#include <assert.h>
+#include <stdio.h>
+
+int main() {
+  FILE *fp = fopen("/dev/null", "w");
+  assert(fp);
+  freopen(NULL, "a", fp);
+  fclose(fp);
+  return 0;
+}