What’s the most frustrating bug you’ve ever squashed, and how long did it take?

For me it was certain time bookings not going through into our CRM and also no logs appearing regarding them.

Yeah, turns out it was my fault.
I suppressed the logger during the "section" in which they are processed.

And since logger suppressings are applied pre building, I didn't find anything for like half a month...

...until I went through the generated JS code by hand and eventually found it.

Fuck me...

Have you ever tried to make a complex synchronous library including complex UX interaction work with React? It does not play well. Took me a month to find the bug, 3 minutes to fix it.

@retoor
I’m sure you sweated when you wrote your bug in that thread.

QA reported that something doesn‘t work and no matter what I did, I couldn‘t reproduce it.
It always worked on my side.
It took me weeks of releasing blind guess fixes to the test system and none of them worked.
Then I decided to refactor a big chunk of the app where this problem seems to appear and that finally fixed it.

It‘s always the ones that are not reproducible or occur sporadically.
Those make you question your sanity.

This guy is an ad spammer. See his comments in his profile.
Just telling so that he should be downvoted by @ragnar, even though this particular rant is not spam.
No mercy for spammers!