From 7a8de91cd78f523fabe8452652513250871a01c6 Mon Sep 17 00:00:00 2001
From: Evan You <yyx990803@gmail.com>
Date: Thu, 21 Feb 2019 14:27:33 -0500
Subject: [PATCH] fix(compiler): handle negative length in codeframe repeat

---
 src/compiler/codeframe.js | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/src/compiler/codeframe.js b/src/compiler/codeframe.js
index 66c413064cf..513d318fcc1 100644
--- a/src/compiler/codeframe.js
+++ b/src/compiler/codeframe.js
@@ -38,11 +38,13 @@ export function generateCodeFrame (
 
 function repeat (str, n) {
   let result = ''
-  while (true) { // eslint-disable-line
-    if (n & 1) result += str
-    n >>>= 1
-    if (n <= 0) break
-    str += str
+  if (n > 0) {
+    while (true) { // eslint-disable-line
+      if (n & 1) result += str
+      n >>>= 1
+      if (n <= 0) break
+      str += str
+    }
   }
   return result
 }