look it's the Dunning-Kruger poster boypic.twitter.com/pOVDz3hU2e
Yeah, I do @musllibc, FOSS & infosec stuff. But now is not the time for a mostly-/only-tech Twitter feed.
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Let's play UB code golf: `int main(void) { double d = 2; }` (Explanation: Missing test of `__STDC_IEC_559__` means FP arithmatic is basically completely UB.)
Nope, just nope. The precision is not specified, but there's no UB, and the result is unused so there's not even implementation-defined behavior here. It's just a program that exits with status 0.
Since precision is completely unspecified, the result of `1.0 + 1.0` could fall outside the range of representable values, which should trigger UB. There is also additional IDB, e.g., from the fact that `FLT_ROUNDS` might be set to 12. AFAIK "generally sane behavior" isn't specd.
The example had no arithmetic.
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