User talk:Thundergnat: Difference between revisions
→Anti-primes - concurrency failure?
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:Hmm. That's odd. They both work fine for me. After running them 100 times in a row, I've had no failures. I'm not on blead though, only on 2018.11 tagged release. Is it OS specific maybe? I'm using Linux Mint 19. --[[User:Thundergnat|Thundergnat]] ([[User talk:Thundergnat|talk]]) 18:11, 8 December 2018 (UTC)
::Kind of went down the rabbit hole on this one... Stress-tested all of the RC tasks that use concurrency (mainly in an Ubuntu VM with the latest P6, but also Windows/2018.10). P6 performed pretty well (aside from sporadic crashes), always giving correct results '''except''' for 'Anti-primes'. So it doesn't appear to matter which OS or P6 version, in line with the race condition hypothesis. The best way I found to trigger is low free memory. Also, the story with 'Proper divisors' and .race: Always ended up with the right answer, but if you look at @candidates you see that it's different with each run. --[[User:SqrtNegInf|SqrtNegInf]] ([[User talk:SqrtNegInf|talk]]) 15:59, 11 January 2019 (UTC)
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