diff --git a/clippy_utils/src/ty/type_certainty/mod.rs b/clippy_utils/src/ty/type_certainty/mod.rs
index 7913926928f..ad50786eece 100644
--- a/clippy_utils/src/ty/type_certainty/mod.rs
+++ b/clippy_utils/src/ty/type_certainty/mod.rs
@@ -90,7 +90,7 @@ fn expr_type_certainty(cx: &LateContext<'_>, expr: &Expr<'_>) -> Certainty {
     if let Some(def_id) = adt_def_id(expr_ty) {
         certainty.with_def_id(def_id)
     } else {
-        certainty
+        certainty.clear_def_id()
     }
 }
 
diff --git a/tests/ui/crashes/ice-12585.rs b/tests/ui/crashes/ice-12585.rs
new file mode 100644
index 00000000000..7928115c0a9
--- /dev/null
+++ b/tests/ui/crashes/ice-12585.rs
@@ -0,0 +1,26 @@
+#![allow(clippy::unit_arg)]
+
+struct One {
+    x: i32,
+}
+struct Two {
+    x: i32,
+}
+
+struct Product {}
+
+impl Product {
+    pub fn a_method(self, _: ()) {}
+}
+
+fn from_array(_: [i32; 2]) -> Product {
+    todo!()
+}
+
+pub fn main() {
+    let one = One { x: 1 };
+    let two = Two { x: 2 };
+
+    let product = from_array([one.x, two.x]);
+    product.a_method(<()>::default());
+}