1 files changed, 67 insertions, 0 deletions
diff --git a/tests/ui/lint/suggestions.rs b/tests/ui/lint/suggestions.rs
new file mode 100644
index 00000000000..be6f0d6b30f
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+++ b/tests/ui/lint/suggestions.rs
@@ -0,0 +1,67 @@
+// ignore-tidy-tab
+// run-rustfix
+
+#![warn(unused_mut, unused_parens)] // UI tests pass `-A unused`—see Issue #43896
+
+#[no_mangle] const DISCOVERY: usize = 1;
+//~^ ERROR const items should never be `#[no_mangle]`
+//~| HELP try a static value
+
+#[no_mangle]
+//~^ HELP remove this attribute
+pub fn defiant<T>(_t: T) {}
+//~^ WARN functions generic over types or consts must be mangled
+
+#[no_mangle]
+fn rio_grande() {}
+
+mod badlands {
+    // The private-no-mangle lints shouldn't suggest inserting `pub` when the
+    // item is already `pub` (but triggered the lint because, e.g., it's in a
+    // private module). (Issue #47383)
+    #[no_mangle] pub const DAUNTLESS: bool = true;
+    //~^ ERROR const items should never be `#[no_mangle]`
+    //~| HELP try a static value
+    #[allow(dead_code)] // for rustfix
+    #[no_mangle] pub fn val_jean<T>() {}
+    //~^ WARN functions generic over types or consts must be mangled
+    //~| HELP remove this attribute
+
+    // ... but we can suggest just-`pub` instead of restricted
+    #[no_mangle] pub(crate) const VETAR: bool = true;
+    //~^ ERROR const items should never be `#[no_mangle]`
+    //~| HELP try a static value
+    #[allow(dead_code)] // for rustfix
+    #[no_mangle] pub(crate) fn crossfield<T>() {}
+    //~^ WARN functions generic over types or consts must be mangled
+    //~| HELP remove this attribute
+}
+
+struct Equinox {
+    warp_factor: f32,
+}
+
+fn main() {
+    while true {
+    //~^ WARN denote infinite loops
+    //~| HELP use `loop`
+        let mut registry_no = (format!("NX-{}", 74205));
+        //~^ WARN does not need to be mutable
+        //~| HELP remove this `mut`
+        //~| WARN unnecessary parentheses
+        //~| HELP remove these parentheses
+        // the line after `mut` has a `\t` at the beginning, this is on purpose
+        let mut
+	        b = 1;
+        //~^^ WARN does not need to be mutable
+        //~| HELP remove this `mut`
+        let d = Equinox { warp_factor: 9.975 };
+        match d {
+            #[allow(unused_variables)] // for rustfix
+            Equinox { warp_factor: warp_factor } => {}
+            //~^ WARN this pattern is redundant
+            //~| HELP use shorthand field pattern
+        }
+        println!("{} {}", registry_no, b);
+    }
+}