From 2fef457af5e8f2a804eb4e6293e5d5ada968cf7c Mon Sep 17 00:00:00 2001
From: Tomohiko OKAZAKI <34153037+xcokazaki@users.noreply.github.com>
Date: Tue, 12 Mar 2019 20:06:13 +0900
Subject: avoid index error if input size is zero (#1)

avoid index error if input size is zero (#1)
---
 nimpb/nimpb.nim | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/nimpb/nimpb.nim b/nimpb/nimpb.nim
index 9933b18..260b379 100644
--- a/nimpb/nimpb.nim
+++ b/nimpb/nimpb.nim
@@ -399,7 +399,7 @@ proc protoWriteBytes*(stream: Stream, bytes: seq[byte], fieldNumber: int) =
 
 proc safeReadStr*(stream: Stream, size: int): string =
     result = newString(size)
-    if readData(stream, addr(result[0]), size) != size:
+    if 0 < size and readData(stream, addr(result[0]), size) != size:
         raise newException(IOError, "cannot read from stream")
 
 proc protoReadString*(stream: Stream): string =
-- 
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