From 8f2a78ef1ed2c64996c998189843b945f45fc81e Mon Sep 17 00:00:00 2001
From: ysCha <yscha@interplug.co.kr>
Date: Tue, 2 Sep 2025 17:25:00 +0900
Subject: [PATCH] =?UTF-8?q?big.mjs:139=20Uncaught=20Error:=20[big.js]=20In?=
 =?UTF-8?q?valid=20number=20=20at=20klass.setLength=20(QLine.js:72:36)=20(?=
 =?UTF-8?q?NaN=20=3D>=200=20=EC=B2=98=EB=A6=AC)?=
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---
 src/components/fabric/QLine.js | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/components/fabric/QLine.js b/src/components/fabric/QLine.js
index 7881712e..77254d5d 100644
--- a/src/components/fabric/QLine.js
+++ b/src/components/fabric/QLine.js
@@ -2,6 +2,7 @@ import { fabric } from 'fabric'
 import { v4 as uuidv4 } from 'uuid'
 import { getDirectionByPoint } from '@/util/canvas-util'
 import { calcLinePlaneSize } from '@/util/qpolygon-utils'
+import { logger } from '@/util/logger'
 
 export const QLine = fabric.util.createClass(fabric.Line, {
   type: 'QLine',
@@ -69,7 +70,14 @@ export const QLine = fabric.util.createClass(fabric.Line, {
   },
 
   setLength() {
-    this.length = calcLinePlaneSize(this) / 10
+    // Ensure all required properties are valid numbers
+    const { x1, y1, x2, y2 } = this;
+    if (isNaN(x1) || isNaN(y1) || isNaN(x2) || isNaN(y2)) {
+      logger.error('Invalid coordinates in QLine:', { x1, y1, x2, y2 });
+      this.length = 0;
+      return;
+    }
+    this.length = calcLinePlaneSize({ x1, y1, x2, y2 }) / 10;
   },
 
   addLengthText() {