Beginning Go 1.21, the version in go.mod will control behavior in the standard library, so that you can upgrade the compiler/stdlib and not have your programs b

Beginning Go 1.21, the version in go.mod will control behavior in the standard library, so that you can upgrade the compiler/stdlib and not have your programs break: https://tip.golang.org/doc/godebug https://tip.golang.org/doc/godebug