From 4cebad3859f8cc4fe526a89ef2277d1db9ee9b7c Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Tue, 6 Jul 2021 16:06:23 +0200
Subject: Clear errno before calling strto*() functions

---
 libbutl/builtin.cxx | 1 +
 1 file changed, 1 insertion(+)

(limited to 'libbutl/builtin.cxx')

diff --git a/libbutl/builtin.cxx b/libbutl/builtin.cxx
index a6bb94b..61df568 100644
--- a/libbutl/builtin.cxx
+++ b/libbutl/builtin.cxx
@@ -1929,6 +1929,7 @@ namespace butl
         if (!a.empty () && a[0] != '-' && a[0] != '+')
         {
           char* e (nullptr);
+          errno = 0; // We must clear it according to POSIX.
           n = strtoull (a.c_str (), &e, 10); // Can't throw.
 
           if (errno != ERANGE && e == a.c_str () + a.size ())
-- 
cgit v1.1