luna, only carbon nowConsider this code. One thread repeatedly prints the number 100 in decimal to std::cout. Another thread repeatedly prints the number 0x100 in hex (which will output as '100') to std::cout.
You might reasonably expect that the output will simply be '100' over and over and over.
Unfortunately, the calls to operator<< can get interleaved so you end up with crosstalk of the format specifiers:
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