From 7dda6ca77354b2e6979c7d8ddd44f856fe02b77a Mon Sep 17 00:00:00 2001
From: Dirk Zimoch <dirk.zimoch@psi.ch>
Date: Mon, 2 Mar 2020 13:56:42 +0100
Subject: [PATCH] bugix for systems where vsnprintf returns -1 on buffer
 overrun: double buffer capacity

---
 src/StreamBuffer.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/StreamBuffer.cc b/src/StreamBuffer.cc
index 05c59e2..fe6ee31 100644
--- a/src/StreamBuffer.cc
+++ b/src/StreamBuffer.cc
@@ -306,7 +306,7 @@ print(const char* fmt, ...)
             return *this;
         }
         if (printed > -1) grow(len+printed);
-        else grow(len);
+        else grow(cap*2-1);
     }
 }