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diff --git a/src/test/ui/lang-items/issue-83471.rs b/src/test/ui/lang-items/issue-83471.rs
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index 000000000..b32aa0341
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+++ b/src/test/ui/lang-items/issue-83471.rs
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+// Regression test for the ICE reported in issue #83471.
+
+#![crate_type="lib"]
+#![feature(no_core)]
+#![no_core]
+
+#[lang = "sized"]
+//~^ ERROR: language items are subject to change [E0658]
+trait Sized {}
+
+#[lang = "fn"]
+//~^ ERROR: language items are subject to change [E0658]
+//~| ERROR: `fn` language item must be applied to a trait with 1 generic argument
+trait Fn {
+    fn call(export_name);
+    //~^ ERROR: expected type
+    //~| WARNING: anonymous parameters are deprecated
+    //~| WARNING: this is accepted in the current edition
+}
+fn call_through_fn_trait() {
+    a()
+    //~^ ERROR: cannot find function
+}