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tests: fix potential races with t.Parallel and loops ➿
Following the CommonMistake[1] in Go, for loop and go routines can be a big racey problem. This happens quite easily when using `t.Parallel` in for loop with tests. This fixes possible races by adding a "shadow" var that is evaluated at each iteration and placed on the stack for the goroutine, so each slice element is available to the goroutine when it is eventually executed. [1]: https://github.com/golang/go/wiki/CommonMistakes#using-goroutines-on-loop-iterator-variables Signed-off-by: Vincent Demeester <[email protected]>
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