From e0abf14b09f5fcb20fa2301a9a0499d3d1c5d11a Mon Sep 17 00:00:00 2001
From: Marco Bodrato <bodrato@mail.dm.unipi.it>
Date: Thu, 8 Feb 2018 13:07:16 +0100
Subject: printf/snprntffuns.c: report -1 as an error. acinclude.m4: Refuse -1
 as a normal return value.

---
 acinclude.m4 | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'acinclude.m4')

diff --git a/acinclude.m4 b/acinclude.m4
index aa91aa11f..2ea5f5aa2 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -3729,11 +3729,11 @@ check (const char *fmt, ...)
 
   ret = vsnprintf (buf, 4, fmt, ap);
 
-  if (strcmp (buf, "hel") != 0)
+  if (ret == -1 || strcmp (buf, "hel") != 0)
     return 1;
 
   /* allowed return values */
-  if (ret != -1 && ret != 3 && ret != 11)
+  if (ret != 3 && ret != 11)
     return 2;
 
   return 0;
-- 
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