From 5a91443e36a242d26f4af1911b71cdccb4e3719d Mon Sep 17 00:00:00 2001
From: Looly <loolly@gmail.com>
Date: Sat, 6 Aug 2022 18:51:28 +0800
Subject: [PATCH] fix bug

---
 CHANGELOG.md                                                  | 3 ++-
 hutool-core/src/main/java/cn/hutool/core/util/RandomUtil.java | 4 ++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index f09f29030..d0dcede5d 100755
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,11 +3,12 @@
 
 -------------------------------------------------------------------------------------------------------------
 
-# 5.8.6.M1 (2022-07-30)
+# 5.8.6.M1 (2022-08-06)
 
 ### 🐣新特性
 ### 🐞Bug修复
 * 【http   】     修复https下可能的Patch、Get请求失效问题（issue#I3Z3DH@Gitee）
+* 【core   】     修复RandomUtil#randomString 入参length为负数时报错问题（issue#2515@Github）
 
 -------------------------------------------------------------------------------------------------------------
 
diff --git a/hutool-core/src/main/java/cn/hutool/core/util/RandomUtil.java b/hutool-core/src/main/java/cn/hutool/core/util/RandomUtil.java
index 2c415b386..0a7ec302c 100755
--- a/hutool-core/src/main/java/cn/hutool/core/util/RandomUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/util/RandomUtil.java
@@ -549,11 +549,11 @@ public class RandomUtil {
 		if (StrUtil.isEmpty(baseString)) {
 			return StrUtil.EMPTY;
 		}
-		final StringBuilder sb = new StringBuilder(length);
-
 		if (length < 1) {
 			length = 1;
 		}
+
+		final StringBuilder sb = new StringBuilder(length);
 		int baseLength = baseString.length();
 		for (int i = 0; i < length; i++) {
 			int number = randomInt(baseLength);