https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64265
Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2014-12-12 CC| |dodji at gcc dot gnu.org, | |dvyukov at gcc dot gnu.org, | |jakub at gcc dot gnu.org, | |kcc at gcc dot gnu.org Component|c++ |sanitizer Target Milestone|--- |5.0 Summary|r217669 broke tsan |[5 Regression] r217669 | |broke tsan Ever confirmed|0 |1 --- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> --- So it looks like tsan wants to instrument the function entry edge but instead instruments the first basic block without considering backedges. Latent TSAN bug.