[munificent]

:(

That's because Go chose to reuse the loop variable in each iteration instead of binding a fresh one each time.

C# figure out that was a mistake years ago and fixed it in 5.0 [1]. Dart has always bound a new variable in each iteration. I don't know why Go made the choice they did.

[1]: https://blogs.msdn.microsoft.com/ericlippert/2009/11/12/clos...