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Since Go1.10, go test runs vet on the tests before executing them. Moreover, the vet tool typechecks the package under analysis with go/types before running. In Go1.10, a typechecking failure just caused a warning to be printed. In Go1.11, a typechecking failure will cause vet to exit with a fatal error (see Issue #21287). This means that starting with Go1.11, tests that don't typecheck will fail immediately. This would not normally be an issue, since a test that doesn't typecheck shouldn't even compile, and it should already be broken. Unfortunately, there's a bug in gc that makes it accept programs with unused variables inside a closure (Issue #3059). This means that a test with an unused variable inside a closure, that compiled and passed in Go1.10, will fail in the typechecking step of vet starting with Go1.11. Explain this in the 1.11 release notes. Fixes #26109 Change-Id: I970c1033ab6bc985d8c64bd24f56e854af155f96 Reviewed-on: https://go-review.googlesource.com/121455 Reviewed-by: Ian Lance Taylor <iant@golang.org> |
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