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-rw-r--r--openssl/agent/pkcs11/url.cxx1
1 files changed, 1 insertions, 0 deletions
diff --git a/openssl/agent/pkcs11/url.cxx b/openssl/agent/pkcs11/url.cxx
index 5bed7b0..0c946d9 100644
--- a/openssl/agent/pkcs11/url.cxx
+++ b/openssl/agent/pkcs11/url.cxx
@@ -27,6 +27,7 @@ namespace openssl
{
const char* b (s.c_str ());
char* e (nullptr);
+ errno = 0; // We must clear it according to POSIX.
uint64_t v (strtoull (b, &e, 10)); // Can't throw.
if (errno != ERANGE && e == b + s.size () && v >= min && v <= max)