Test showing it doesnt work

tests/ui/resolve/suggest-import-without-clobbering-attrs.fixed

@@ -0,0 +1,16 @@
+// run-rustfix
+// compile-flags: --cfg=whatever -Aunused
+
+#[cfg(whatever)]
+use y::z;
+use y::Whatever;
+
+mod y {
+    pub(crate) fn z() {}
+    pub(crate) struct Whatever;
+}
+
+fn main() {
+    z();
+    //~^ ERROR cannot find function `z` in this scope
+}

tests/ui/resolve/suggest-import-without-clobbering-attrs.rs

@@ -0,0 +1,15 @@
+// run-rustfix
+// compile-flags: --cfg=whatever -Aunused
+
+#[cfg(whatever)]
+use y::Whatever;
+
+mod y {
+    pub(crate) fn z() {}
+    pub(crate) struct Whatever;
+}
+
+fn main() {
+    z();
+    //~^ ERROR cannot find function `z` in this scope
+}

tests/ui/resolve/suggest-import-without-clobbering-attrs.stderr

@@ -0,0 +1,14 @@
+error[E0425]: cannot find function `z` in this scope
+  --> $DIR/suggest-import-without-clobbering-attrs.rs:13:5
+   |
+LL |     z();
+   |     ^ not found in this scope
+   |
+help: consider importing this function
+   |
+LL + use y::z;
+   |
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0425`.