Error with malformed domain that contains a "/" character

src/Cookie/SetCookie.php

@@ -35,8 +35,8 @@ public static function fromString($cookie)
         $data = self::$defaults;
         // Explode the cookie string using a series of semicolons
         $pieces = array_filter(array_map('trim', explode(';', $cookie)));
-        // The name of the cookie (first kvp) must include an equal sign.
-        if (empty($pieces) || !strpos($pieces[0], '=')) {
+        // The name of the cookie (first kvp) must exist and include an equal sign.
+        if (empty($pieces[0]) || !strpos($pieces[0], '=')) {
             return new self($data);
         }
 
@@ -348,7 +348,7 @@ public function matchesDomain($domain)
             return false;
         }
 
-        return (bool) preg_match('/\.' . preg_quote($cookieDomain) . '$/', $domain);
+        return (bool) preg_match('/\.' . preg_quote($cookieDomain, '/') . '$/', $domain);
     }
 
     /**

tests/Cookie/SetCookieTest.php

@@ -115,6 +115,9 @@ public function testMatchesDomain()
 
         $cookie->setDomain('.local');
         $this->assertTrue($cookie->matchesDomain('example.local'));
+
+        $cookie->setDomain('example.com/'); // malformed domain
+        $this->assertFalse($cookie->matchesDomain('example.com'));
     }
 
     public function pathMatchProvider()
@@ -223,6 +226,7 @@ public function cookieParserDataProvider()
             ),
             array('', []),
             array('foo', []),
+            array('; foo', []),
             array(
                 'foo="bar"',
                 [