diff --git a/packages/babel-parser/src/parser/expression.js b/packages/babel-parser/src/parser/expression.js
index c1f6aa6d24..431482ff3d 100644
--- a/packages/babel-parser/src/parser/expression.js
+++ b/packages/babel-parser/src/parser/expression.js
@@ -767,28 +767,32 @@ export default class ExpressionParser extends LValParser {
     optional: boolean,
   ): N.Expression {
     const oldMaybeInArrowParameters = this.state.maybeInArrowParameters;
-    this.state.maybeInArrowParameters = true;
+    let refExpressionErrors = null;
 
+    this.state.maybeInArrowParameters = true;
     this.next(); // eat `(`
 
     let node = this.startNodeAt(startPos, startLoc);
     node.callee = base;
+
     if (state.maybeAsyncArrow) {
       this.expressionScope.enter(newAsyncArrowScope());
+      refExpressionErrors = new ExpressionErrors();
     }
 
     if (state.optionalChainMember) {
       node.optional = optional;
     }
+
     if (optional) {
-      node.arguments = this.parseCallExpressionArguments(tt.parenR, false);
+      node.arguments = this.parseCallExpressionArguments(tt.parenR);
     } else {
       node.arguments = this.parseCallExpressionArguments(
         tt.parenR,
-        state.maybeAsyncArrow,
         base.type === "Import",
         base.type !== "Super",
         node,
+        refExpressionErrors,
       );
     }
     this.finishCallExpression(node, state.optionalChainMember);
@@ -803,6 +807,7 @@ export default class ExpressionParser extends LValParser {
       );
     } else {
       if (state.maybeAsyncArrow) {
+        this.checkExpressionErrors(refExpressionErrors, true);
         this.expressionScope.exit();
       }
       this.toReferencedArguments(node);
@@ -891,10 +896,10 @@ export default class ExpressionParser extends LValParser {
 
   parseCallExpressionArguments(
     close: TokenType,
-    possibleAsyncArrow: boolean,
     dynamicImport?: boolean,
     allowPlaceholder?: boolean,
     nodeForExtra?: ?N.Node,
+    refExpressionErrors?: ?ExpressionErrors,
   ): $ReadOnlyArray<?N.Expression> {
     const elts = [];
     let first = true;
@@ -932,8 +937,8 @@ export default class ExpressionParser extends LValParser {
       elts.push(
         this.parseExprListItem(
           false,
-          possibleAsyncArrow ? new ExpressionErrors() : undefined,
-          possibleAsyncArrow ? { start: 0 } : undefined,
+          refExpressionErrors,
+          { start: 0 },
           allowPlaceholder,
         ),
       );
diff --git a/packages/babel-parser/test/fixtures/es2017/async-arrow/parenthesized-assign-object/input.js b/packages/babel-parser/test/fixtures/es2017/async-arrow/parenthesized-assign-object/input.js
new file mode 100644
index 0000000000..fbeb7c26b3
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/es2017/async-arrow/parenthesized-assign-object/input.js
@@ -0,0 +1 @@
+async ({ __proto__: x, __proto__: y }) => {}
\ No newline at end of file
diff --git a/packages/babel-parser/test/fixtures/es2017/async-arrow/parenthesized-assign-object/output.json b/packages/babel-parser/test/fixtures/es2017/async-arrow/parenthesized-assign-object/output.json
new file mode 100644
index 0000000000..c12e4a5503
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/es2017/async-arrow/parenthesized-assign-object/output.json
@@ -0,0 +1,72 @@
+{
+  "type": "File",
+  "start":0,"end":44,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":44}},
+  "program": {
+    "type": "Program",
+    "start":0,"end":44,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":44}},
+    "sourceType": "script",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ExpressionStatement",
+        "start":0,"end":44,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":44}},
+        "expression": {
+          "type": "ArrowFunctionExpression",
+          "start":0,"end":44,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":44}},
+          "id": null,
+          "generator": false,
+          "async": true,
+          "params": [
+            {
+              "type": "ObjectPattern",
+              "start":7,"end":37,"loc":{"start":{"line":1,"column":7},"end":{"line":1,"column":37}},
+              "properties": [
+                {
+                  "type": "ObjectProperty",
+                  "start":9,"end":21,"loc":{"start":{"line":1,"column":9},"end":{"line":1,"column":21}},
+                  "method": false,
+                  "key": {
+                    "type": "Identifier",
+                    "start":9,"end":18,"loc":{"start":{"line":1,"column":9},"end":{"line":1,"column":18},"identifierName":"__proto__"},
+                    "name": "__proto__"
+                  },
+                  "computed": false,
+                  "shorthand": false,
+                  "value": {
+                    "type": "Identifier",
+                    "start":20,"end":21,"loc":{"start":{"line":1,"column":20},"end":{"line":1,"column":21},"identifierName":"x"},
+                    "name": "x"
+                  }
+                },
+                {
+                  "type": "ObjectProperty",
+                  "start":23,"end":35,"loc":{"start":{"line":1,"column":23},"end":{"line":1,"column":35}},
+                  "method": false,
+                  "key": {
+                    "type": "Identifier",
+                    "start":23,"end":32,"loc":{"start":{"line":1,"column":23},"end":{"line":1,"column":32},"identifierName":"__proto__"},
+                    "name": "__proto__"
+                  },
+                  "computed": false,
+                  "shorthand": false,
+                  "value": {
+                    "type": "Identifier",
+                    "start":34,"end":35,"loc":{"start":{"line":1,"column":34},"end":{"line":1,"column":35},"identifierName":"y"},
+                    "name": "y"
+                  }
+                }
+              ]
+            }
+          ],
+          "body": {
+            "type": "BlockStatement",
+            "start":42,"end":44,"loc":{"start":{"line":1,"column":42},"end":{"line":1,"column":44}},
+            "body": [],
+            "directives": []
+          }
+        }
+      }
+    ],
+    "directives": []
+  }
+}
\ No newline at end of file
diff --git a/packages/babel-parser/test/fixtures/es2017/async-call/parenthesized-argument-object-double-proto/input.js b/packages/babel-parser/test/fixtures/es2017/async-call/parenthesized-argument-object-double-proto/input.js
new file mode 100644
index 0000000000..eeb01ee235
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/es2017/async-call/parenthesized-argument-object-double-proto/input.js
@@ -0,0 +1 @@
+async({ __proto__: x, __proto__: y })
\ No newline at end of file
diff --git a/packages/babel-parser/test/fixtures/es2017/async-call/parenthesized-argument-object-double-proto/output.json b/packages/babel-parser/test/fixtures/es2017/async-call/parenthesized-argument-object-double-proto/output.json
new file mode 100644
index 0000000000..35abfd88cd
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/es2017/async-call/parenthesized-argument-object-double-proto/output.json
@@ -0,0 +1,71 @@
+{
+  "type": "File",
+  "start":0,"end":37,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":37}},
+  "errors": [
+    "SyntaxError: Redefinition of __proto__ property. (1:22)"
+  ],
+  "program": {
+    "type": "Program",
+    "start":0,"end":37,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":37}},
+    "sourceType": "script",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ExpressionStatement",
+        "start":0,"end":37,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":37}},
+        "expression": {
+          "type": "CallExpression",
+          "start":0,"end":37,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":37}},
+          "callee": {
+            "type": "Identifier",
+            "start":0,"end":5,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":5},"identifierName":"async"},
+            "name": "async"
+          },
+          "arguments": [
+            {
+              "type": "ObjectExpression",
+              "start":6,"end":36,"loc":{"start":{"line":1,"column":6},"end":{"line":1,"column":36}},
+              "properties": [
+                {
+                  "type": "ObjectProperty",
+                  "start":8,"end":20,"loc":{"start":{"line":1,"column":8},"end":{"line":1,"column":20}},
+                  "method": false,
+                  "key": {
+                    "type": "Identifier",
+                    "start":8,"end":17,"loc":{"start":{"line":1,"column":8},"end":{"line":1,"column":17},"identifierName":"__proto__"},
+                    "name": "__proto__"
+                  },
+                  "computed": false,
+                  "shorthand": false,
+                  "value": {
+                    "type": "Identifier",
+                    "start":19,"end":20,"loc":{"start":{"line":1,"column":19},"end":{"line":1,"column":20},"identifierName":"x"},
+                    "name": "x"
+                  }
+                },
+                {
+                  "type": "ObjectProperty",
+                  "start":22,"end":34,"loc":{"start":{"line":1,"column":22},"end":{"line":1,"column":34}},
+                  "method": false,
+                  "key": {
+                    "type": "Identifier",
+                    "start":22,"end":31,"loc":{"start":{"line":1,"column":22},"end":{"line":1,"column":31},"identifierName":"__proto__"},
+                    "name": "__proto__"
+                  },
+                  "computed": false,
+                  "shorthand": false,
+                  "value": {
+                    "type": "Identifier",
+                    "start":33,"end":34,"loc":{"start":{"line":1,"column":33},"end":{"line":1,"column":34},"identifierName":"y"},
+                    "name": "y"
+                  }
+                }
+              ]
+            }
+          ]
+        }
+      }
+    ],
+    "directives": []
+  }
+}
\ No newline at end of file
diff --git a/packages/babel-parser/test/fixtures/es2017/async-call/parenthesized-argument-object-with-assignment/input.js b/packages/babel-parser/test/fixtures/es2017/async-call/parenthesized-argument-object-with-assignment/input.js
new file mode 100644
index 0000000000..c048527f25
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/es2017/async-call/parenthesized-argument-object-with-assignment/input.js
@@ -0,0 +1 @@
+async({ foo33 = 1 });
\ No newline at end of file
diff --git a/packages/babel-parser/test/fixtures/es2017/async-call/parenthesized-argument-object-with-assignment/options.json b/packages/babel-parser/test/fixtures/es2017/async-call/parenthesized-argument-object-with-assignment/options.json
new file mode 100644
index 0000000000..51c483f3d3
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/es2017/async-call/parenthesized-argument-object-with-assignment/options.json
@@ -0,0 +1,3 @@
+{
+  "throws": "Unexpected token (1:14)"
+}
\ No newline at end of file
diff --git a/packages/babel-parser/test/fixtures/flow/async-call/parenthesized-argument-object-double-proto/input.js b/packages/babel-parser/test/fixtures/flow/async-call/parenthesized-argument-object-double-proto/input.js
new file mode 100644
index 0000000000..e5e4e03180
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/flow/async-call/parenthesized-argument-object-double-proto/input.js
@@ -0,0 +1 @@
+async?.({ __proto__: x, __proto__: y })
\ No newline at end of file
diff --git a/packages/babel-parser/test/fixtures/flow/async-call/parenthesized-argument-object-double-proto/output.json b/packages/babel-parser/test/fixtures/flow/async-call/parenthesized-argument-object-double-proto/output.json
new file mode 100644
index 0000000000..3323614118
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/flow/async-call/parenthesized-argument-object-double-proto/output.json
@@ -0,0 +1,72 @@
+{
+  "type": "File",
+  "start":0,"end":39,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":39}},
+  "errors": [
+    "SyntaxError: Redefinition of __proto__ property. (1:24)"
+  ],
+  "program": {
+    "type": "Program",
+    "start":0,"end":39,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":39}},
+    "sourceType": "module",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ExpressionStatement",
+        "start":0,"end":39,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":39}},
+        "expression": {
+          "type": "OptionalCallExpression",
+          "start":0,"end":39,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":39}},
+          "callee": {
+            "type": "Identifier",
+            "start":0,"end":5,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":5},"identifierName":"async"},
+            "name": "async"
+          },
+          "optional": true,
+          "arguments": [
+            {
+              "type": "ObjectExpression",
+              "start":8,"end":38,"loc":{"start":{"line":1,"column":8},"end":{"line":1,"column":38}},
+              "properties": [
+                {
+                  "type": "ObjectProperty",
+                  "start":10,"end":22,"loc":{"start":{"line":1,"column":10},"end":{"line":1,"column":22}},
+                  "method": false,
+                  "key": {
+                    "type": "Identifier",
+                    "start":10,"end":19,"loc":{"start":{"line":1,"column":10},"end":{"line":1,"column":19},"identifierName":"__proto__"},
+                    "name": "__proto__"
+                  },
+                  "computed": false,
+                  "shorthand": false,
+                  "value": {
+                    "type": "Identifier",
+                    "start":21,"end":22,"loc":{"start":{"line":1,"column":21},"end":{"line":1,"column":22},"identifierName":"x"},
+                    "name": "x"
+                  }
+                },
+                {
+                  "type": "ObjectProperty",
+                  "start":24,"end":36,"loc":{"start":{"line":1,"column":24},"end":{"line":1,"column":36}},
+                  "method": false,
+                  "key": {
+                    "type": "Identifier",
+                    "start":24,"end":33,"loc":{"start":{"line":1,"column":24},"end":{"line":1,"column":33},"identifierName":"__proto__"},
+                    "name": "__proto__"
+                  },
+                  "computed": false,
+                  "shorthand": false,
+                  "value": {
+                    "type": "Identifier",
+                    "start":35,"end":36,"loc":{"start":{"line":1,"column":35},"end":{"line":1,"column":36},"identifierName":"y"},
+                    "name": "y"
+                  }
+                }
+              ]
+            }
+          ]
+        }
+      }
+    ],
+    "directives": []
+  }
+}
\ No newline at end of file