Don't allow adjustments for manual_map

Author: Jarcho

clippy_lints/src/manual_map.rs

@@ -104,12 +104,18 @@ impl LateLintPass<'_> for ManualMap {
                 None => return,
             };
 
+            // These two lints will go back and forth with each other.
             if cx.typeck_results().expr_ty(some_expr) == cx.tcx.types.unit
                 && !is_allowed(cx, OPTION_MAP_UNIT_FN, expr.hir_id)
             {
                 return;
             }
 
+            // `map` won't perform any adjustments.
+            if !cx.typeck_results().expr_adjustments(some_expr).is_empty() {
+                return;
+            }
+
             if !can_move_expr_to_closure(cx, some_expr) {
                 return;
             }

tests/ui/manual_map_option.fixed

@@ -146,4 +146,11 @@ fn main() {
             None => None,
         };
     }
+
+    // #7077
+    let s = &String::new();
+    let _: Option<&str> = match Some(s) {
+        Some(s) => Some(s),
+        None => None,
+    };
 }

tests/ui/manual_map_option.rs

@@ -212,4 +212,11 @@ fn main() {
             None => None,
         };
     }
+
+    // #7077
+    let s = &String::new();
+    let _: Option<&str> = match Some(s) {
+        Some(s) => Some(s),
+        None => None,
+    };
 }