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lang-bash
printf '%f\n' 1mostly gives menan(occasionally-nan). OTOH the same bash version built from source on the same system seems to behave as expected.gdb, I can underltraceorltrace -e '*@*'the latter showing__printf_chkbehaving erratically, so could be a libc bug. I can't reproduce with any other shell orprintfimplementation orgawk'sprintf.