From 1bdd34c8fbea5930174b11528c2f144adad5b35a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rados=C5=82aw=20Miernik?= <radekmie@gmail.com>
Date: Tue, 15 Feb 2022 11:43:25 +0100
Subject: [PATCH] Removed negative lookbehind (fixes #1088).

---
 packages/uniforms/__tests__/joinName.ts | 7 +++++++
 packages/uniforms/src/joinName.ts       | 2 +-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/packages/uniforms/__tests__/joinName.ts b/packages/uniforms/__tests__/joinName.ts
index d475acc86..0da4c9c1d 100644
--- a/packages/uniforms/__tests__/joinName.ts
+++ b/packages/uniforms/__tests__/joinName.ts
@@ -124,5 +124,12 @@ describe('joinName', () => {
     test(["['']"], ['["[\'\']"]'], '["[\'\']"]');
     test(['["'], ['["[\\""]'], '["[\\""]');
     test(['[""'], ['["[\\"\\""]'], '["[\\"\\""]');
+
+    // Incorrect escape.
+    test(['["a\\"]'], ['["[\\"a\\\\"]"]'], '["[\\"a\\\\"]"]');
+    test(['[\\""]'], ['["[\\\\"\\"]"]'], '["[\\\\"\\"]"]');
+    test(['[\\"a"]'], ['["[\\\\"a\\"]"]'], '["[\\\\"a\\"]"]');
+    test(['["\\"]'], ['["[\\"\\\\"]"]'], '["[\\"\\\\"]"]');
+    test(['["\\"\\"]'], ['["[\\"\\\\"\\\\"]"]'], '["[\\"\\\\"\\\\"]"]');
   });
 });
diff --git a/packages/uniforms/src/joinName.ts b/packages/uniforms/src/joinName.ts
index e6b4d6651..8b15fef26 100644
--- a/packages/uniforms/src/joinName.ts
+++ b/packages/uniforms/src/joinName.ts
@@ -34,7 +34,7 @@ function unescape(string: string) {
 //
 // All three parts can be empty!
 const nameRegex =
-  /^([^.[\]]*(?:\.[^.[\]]+)*)(?:\.?(\["(?:[^"]|\\")*?(?<!\\)"])\.?(.*))?$/;
+  /^([^.[\]]*(?:\.[^.[\]]+)*)(?:\.?(\["(?:(?:[^"]|\\")*?[^\\])?"])\.?(.*))?$/;
 
 // We cannot use `joinName` as we export a function with assigned internal
 // helpers and the symbol has to stay free until then.