Auto merge of #5297 - JohnTitor:shadow, r=phansch

Use `node_type_opt` over `node_type`

Fix ICE reported in rust-lang/rust#69873.

changelog: Fix ICE in checking bindings

Author: bors

clippy_lints/src/shadow.rs

@@ -154,10 +154,14 @@ fn check_local<'a, 'tcx>(cx: &LateContext<'a, 'tcx>, local: &'tcx Local<'_>, bin
 }
 
 fn is_binding(cx: &LateContext<'_, '_>, pat_id: HirId) -> bool {
-    let var_ty = cx.tables.node_type(pat_id);
-    match var_ty.kind {
-        ty::Adt(..) => false,
-        _ => true,
+    let var_ty = cx.tables.node_type_opt(pat_id);
+    if let Some(var_ty) = var_ty {
+        match var_ty.kind {
+            ty::Adt(..) => false,
+            _ => true,
+        }
+    } else {
+        false
     }
 }
 

tests/ui/crashes/shadow.rs

@@ -0,0 +1,6 @@
+fn main() {
+    let x: [i32; {
+        let u = 2;
+        4
+    }] = [2; { 4 }];
+}