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4b1bcac87e
improve target feature diagnostic And convert the test to use `minicore` so that it runs regardless of the target. This is the only test for many of these target feature diagnostics, so it's nice that it runs anywhere. r? JonathanBrouwer The test here is mostly for legal places for the attribute, is that still how that should be tested?
Please read the rustc-dev-guide chapter on Backend Agnostic Codegen.