From c3b0e979b281795b5ff8a77a7184b9b23c3bfb2e Mon Sep 17 00:00:00 2001
From: kzl <kangzhanlei@qq.com>
Date: Thu, 21 Nov 2024 07:57:39 +0800
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---
 packages/amis-formula/src/evalutor.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/packages/amis-formula/src/evalutor.ts b/packages/amis-formula/src/evalutor.ts
index bf802adcd3b..307797036d1 100644
--- a/packages/amis-formula/src/evalutor.ts
+++ b/packages/amis-formula/src/evalutor.ts
@@ -1110,6 +1110,9 @@ export class Evaluator {
    * @returns {number} 长度
    */
   fnLEN(text: string) {
+    if (text === undefined || text === null) {
+      return 0;
+    }
     text = this.normalizeText(text);
     return text?.length;
   }