From 1f45a8353fbab9b0f913d17919661bc6afadeaf9 Mon Sep 17 00:00:00 2001
From: "Dan S. Camper" <dan.camper@lexisnexisrisk.com>
Date: Mon, 13 May 2024 07:51:59 -0500
Subject: [PATCH] HPCC-31820 Unicode regex errors displayed with garbage at the
 end

---
 rtl/eclrtl/eclregex.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rtl/eclrtl/eclregex.cpp b/rtl/eclrtl/eclregex.cpp
index 0ba83b59123..eaf229f2007 100644
--- a/rtl/eclrtl/eclregex.cpp
+++ b/rtl/eclrtl/eclregex.cpp
@@ -110,7 +110,7 @@ static void failWithUPCRE2Error(int errCode, const char * msgPrefix, const UChar
         char * regexStr = nullptr;
         unsigned regexStrLen;
         rtlUnicodeToEscapedStrX(regexStrLen, regexStr, rtlUnicodeStrlen(regex), regex);
-        regexPattern += regexStr;
+        regexPattern = std::string(regexStr, regexStrLen);
         rtlFree(regexStr);
     }
     failWithPCRE2Error(errCode, msgPrefix, regexPattern.c_str(), errOffset);