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-rw-r--r--tests/rustdoc-ui/lints/unused.rs14
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diff --git a/tests/rustdoc-ui/lints/unused.rs b/tests/rustdoc-ui/lints/unused.rs
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+++ b/tests/rustdoc-ui/lints/unused.rs
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+// check-pass
+
+// This test purpose is to check that unused_imports lint isn't fired
+// by rustdoc. Why would it? Because when rustdoc is running, it uses
+// "everybody-loops" which replaces parts of code with "loop {}" to get
+// huge performance improvements.
+
+#![deny(unused_imports)]
+
+use std::fs::File;
+
+pub fn f() {
+ let _: File;
+}