fix: manual_unwrap_or_default

Suggesting error when expression is none

Author: t-webber

clippy_lints/src/manual_unwrap_or_default.rs

@@ -131,6 +131,17 @@ fn handle<'tcx>(cx: &LateContext<'tcx>, if_let_or_match: IfLetOrMatch<'tcx>, exp
         },
     };
 
+    // // We check if the expression is not a None variant
+    if let Some(none_def_id) = cx.tcx.lang_items().option_none_variant() {
+        if let ExprKind::Path(QPath::Resolved(_, path)) = &condition.kind {
+            if let Some(def_id) = path.res.opt_def_id() {
+                if cx.tcx.parent(def_id) == none_def_id {
+                    return;
+                }
+            }
+        }
+    }
+
     // We check if the return type of the expression implements Default.
     let expr_type = cx.typeck_results().expr_ty(expr);
     if let Some(default_trait_id) = cx.tcx.get_diagnostic_item(sym::Default)