From d689e2b61669805e64f9ad4ecc5a80f72d8ef8fe Mon Sep 17 00:00:00 2001
From: Jake Runzer <jakerunzer@gmail.com>
Date: Tue, 11 Jun 2019 02:30:45 +0100
Subject: [PATCH] babel__traverse: allow undefined scope for both traverse
 functions (#35840)

---
 types/babel__traverse/babel__traverse-tests.ts |  2 ++
 types/babel__traverse/index.d.ts               | 16 ++++++++++++++--
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/types/babel__traverse/babel__traverse-tests.ts b/types/babel__traverse/babel__traverse-tests.ts
index 2bc5a404d6..72f04e380b 100644
--- a/types/babel__traverse/babel__traverse-tests.ts
+++ b/types/babel__traverse/babel__traverse-tests.ts
@@ -149,6 +149,8 @@ const VisitorStateTest: Visitor<SomeVisitorState> = {
     }
 };
 
+traverse(ast, VisitorStateTest, undefined, { someState: "test" });
+
 const VisitorAliasTest: Visitor = {
     Function() {},
     Expression() {},
diff --git a/types/babel__traverse/index.d.ts b/types/babel__traverse/index.d.ts
index 148f5dd7af..0e9ff767b1 100644
--- a/types/babel__traverse/index.d.ts
+++ b/types/babel__traverse/index.d.ts
@@ -11,8 +11,20 @@ import * as t from "@babel/types";
 
 export type Node = t.Node;
 
-export default function traverse<S>(parent: Node | Node[], opts: TraverseOptions<S>, scope: Scope, state: S, parentPath?: NodePath): void;
-export default function traverse(parent: Node | Node[], opts: TraverseOptions, scope?: Scope, state?: any, parentPath?: NodePath): void;
+export default function traverse<S>(
+    parent: Node | Node[],
+    opts: TraverseOptions<S>,
+    scope: Scope | undefined,
+    state: S,
+    parentPath?: NodePath,
+): void;
+export default function traverse(
+    parent: Node | Node[],
+    opts: TraverseOptions,
+    scope?: Scope,
+    state?: any,
+    parentPath?: NodePath,
+): void;
 
 export interface TraverseOptions<S = Node> extends Visitor<S> {
     scope?: Scope;