The weirdest bug I've seen yet was a concurrency race condition which led to 'spooky action at a distance'. Every time I tried to console.log() to observe some

The weirdest bug I've seen yet was a concurrency race condition which led to 'spooky action at a distance'. Every time I tried to console.log() to observe some value to see the cause of the bug, the bug would go away. But alas, I hadn't discovered some new quantum effect... It turns out to have been because the race condition was close within maybe 1 millisecond and adding the console.log() statement there meant that one part of the code would take a bit longer to execute and so the race condition would not occur.