From fb0d1d12a359d9ac4d60ccf0ece1abd6b7b09783 Mon Sep 17 00:00:00 2001
From: Evan Tschannen <ejt@apple.com>
Date: Mon, 10 Sep 2018 15:20:41 -0700
Subject: [PATCH] fix: reserve was not called correctly

---
 fdbclient/JsonString.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fdbclient/JsonString.h b/fdbclient/JsonString.h
index a7afcab08a..1f5b1d8ba4 100644
--- a/fdbclient/JsonString.h
+++ b/fdbclient/JsonString.h
@@ -193,7 +193,7 @@ protected:
 
 	void writeCoercedAsciiNumber(const char *s, int len) {
 		VString &val = jsonText.back();
-		val.reserve(arena, len + 3);
+		val.reserve(arena, val.size() + len + 3);
 		int written = coerceAsciiNumberToJSON(s, len, val.end());
 		if(written > 0) {
 			val.extendUnsafeNoReallocNoInit(written);