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Re:Weird compiler bug – Same code, different results by zaitanz on Friday January 29, 2021 @06:13PM (#25964084)
Op here. Yea this only occurs on Windows with MinGW. Visual C++ and Clang do not have this issue. None of the Linux compilers I tested also had this issue.

And yea you're right on the associative mistake. Will correct this :)

Re:Weird compiler bug – Same code, different results by chrchang523 on Friday January 29, 2021 @08:15PM (#25964996)
I currently build Windows binaries via cross-compilation on Linux using gcc-mingw-w64; I assume that is affected by the bug?
Re:Weird compiler bug – Same code, different results by zaitanz on Friday January 29, 2021 @08:21PM (#25965040)
Most likely. You can check with the pastebin code https://pastebin.com/thTapSgn . Local and Thread outputs should be the same.