diff --git a/gcc/testsuite/rust/compile/functions_without_body.rs b/gcc/testsuite/rust/compile/functions_without_body.rs
new file mode 100644
index 000000000000..36ddea52161e
--- /dev/null
+++ b/gcc/testsuite/rust/compile/functions_without_body.rs
@@ -0,0 +1,21 @@
+struct MyStruct;
+
+trait X {}
+
+fn test_a();
+// { dg-error "free function without a body" "" { target *-*-* } .-1 }
+
+impl MyStruct {
+    fn test_b<T>()
+    // { dg-error "associated function in .impl. without body" "" { target *-*-* } .-1 }
+    where
+        T: Copy;
+
+    fn test_c<T>();
+    // { dg-error "associated function in .impl. without body" "" { target *-*-* } .-1 }
+}
+
+impl X for MyStruct {
+    fn test_d();
+    // { dg-error "associated function in .impl. without body" "" { target *-*-* } .-1 }
+}