Fix manual_unwrap_or FP deref reference

Author: camsteffen

clippy_lints/src/manual_unwrap_or.rs

@@ -11,7 +11,6 @@ use rustc_hir::{Arm, Expr, ExprKind, PatKind};
 use rustc_lint::LintContext;
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_middle::lint::in_external_macro;
-use rustc_middle::ty::adjustment::Adjust;
 use rustc_session::{declare_lint_pass, declare_tool_lint};
 use rustc_span::sym;
 
@@ -72,9 +71,8 @@ fn lint_manual_unwrap_or<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) {
             if is_lang_ctor(cx, qpath, OptionSome) || is_lang_ctor(cx, qpath, ResultOk);
             if let PatKind::Binding(_, binding_hir_id, ..) = unwrap_pat.kind;
             if path_to_local_id(unwrap_arm.body, binding_hir_id);
+            if cx.typeck_results().expr_adjustments(unwrap_arm.body).is_empty();
             if !contains_return_break_continue_macro(or_arm.body);
-            if !cx.typeck_results().expr_adjustments(unwrap_arm.body).iter()
-                .any(|a| matches!(a.kind, Adjust::Deref(Some(..))));
             then {
                 Some(or_arm)
             } else {

tests/ui/manual_unwrap_or.fixed

@@ -171,4 +171,11 @@ fn format_name(name: Option<&Rc<str>>) -> &str {
     }
 }
 
+fn implicit_deref_ref() {
+    let _: &str = match Some(&"bye") {
+        None => "hi",
+        Some(s) => s,
+    };
+}
+
 fn main() {}

tests/ui/manual_unwrap_or.rs

@@ -213,4 +213,11 @@ fn format_name(name: Option<&Rc<str>>) -> &str {
     }
 }
 
+fn implicit_deref_ref() {
+    let _: &str = match Some(&"bye") {
+        None => "hi",
+        Some(s) => s,
+    };
+}
+
 fn main() {}