libsanitizer: Initialize local_head member [PR126307] The following patch cherry picks an upstream fix for this. 2026-07-20 Jakub Jelinek <jakub@redhat.com> PR sanitizer/126307 * tsan/tsan_trace.h: Cherry-pick llvm-project revision cdfdb06c9155080ec97d6e4f4dd90b6e7cefb0ca. (cherry picked from commit b75f76eb7fbd6314d452471d5795d24f004de5f2)