Did that when I was younger, but with my own code :)
There was an if that didn't need brackets when I wrote it. 6 months later it needed more stuff on a branch but i was tired and in a hurry so I didn't notice adding extra lines needs brackets. New code compiled but wasn't part of the if. Turned a 5 minute fix into 2 days.
Of course, all my ifs have had brackets on both sides since then.
It is the thing I love about emacs, it autoindents everything, so if you got brackets/braces/parenthesis wrong you see something you don't expect. But obligatory braces work too.
Yeah maybe these days the smarter autoindent would prevent incidents like this. But it's too late for me, I'll add braces around 1 line branches till i die :)
There was an if that didn't need brackets when I wrote it. 6 months later it needed more stuff on a branch but i was tired and in a hurry so I didn't notice adding extra lines needs brackets. New code compiled but wasn't part of the if. Turned a 5 minute fix into 2 days.
Of course, all my ifs have had brackets on both sides since then.