Thread #2 was created at 0x........: clone (in /...libc...) by 0x........: pthread_create@GLIBC_ (in /lib/libpthread...) by 0x........: pthread_create@* (hg_intercepts.c:...) by 0x........: main (hg05_race2.c:27) Thread #3 was created at 0x........: clone (in /...libc...) by 0x........: pthread_create@GLIBC_ (in /lib/libpthread...) by 0x........: pthread_create@* (hg_intercepts.c:...) by 0x........: main (hg05_race2.c:29) Possible data race during write of size 4 at 0x........ at 0x........: th (hg05_race2.c:17) by 0x........: mythread_wrapper (hg_intercepts.c:...) by 0x........: ... by 0x........: ... Old state: shared-readonly by threads #2, #3 New state: shared-modified by threads #2, #3 Reason: this thread, #3, holds no consistent locks Location 0x........ has never been protected by any lock Location 0x........ is 0 bytes inside foo.poot[5].plop[11], declared at hg05_race2.c:24, in frame #3 of thread 1 ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)