* Init functions
* Top-level variables being shared between all files in a package
* For-loop sharing (fixed in 1.22 [0])
* ldflags (this is more of build behavior, but it took me a while to figure out how some variables were being set [1]. Note: Go does embed some data by default, but an app I was working on introduced more metadata)
* Go build directives prevent IDEs/linters from analyzing a file at all. E.g. if you edit a linux-only file on macOS, you get _zero_ help.
I dunno, there are a lot of other weird, confusing things that Go does. It is less than most other languages, though.
[0] https://go.dev/wiki/LoopvarExperiment
[1] https://www.digitalocean.com/community/tutorials/using-ldfla...