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Hello community, I faced with bug in multithread environment in objective C code which using dispatch_async and block, __sync_add_and_fetch increments global variable. But in case of many..many threads> 5, after every __sync_add_and_fetch got damaged ... int32_t count = 0; ... int main(int argc, char *argv[]) {    for (i = 1; i < 32; ++i) {      ...         char* name;        

...t") in clang 3.3 so I think something else is > probably going on. > > A self-contained, minimal example we can examine would be useful. > > Cheers. > > Tim. -------------- next part -------------- An embedded and charset-unspecified text was scrubbed... Name: disp_async_min.m URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20150409/fbe5d0df/attachment.ksh>