Inline.php

@@ -269,6 +269,9 @@ public static function parseScalar(string $scalar, int $flags = 0, array $delimi
 
             if (null !== $delimiters) {
                 $tmp = ltrim(substr($scalar, $i), ' ');
+                if ('' === $tmp) {
+                    throw new ParseException(sprintf('Unexpected end of line, expected one of "%s".', implode($delimiters)), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
+                }
                 if (!in_array($tmp[0], $delimiters)) {
                     throw new ParseException(sprintf('Unexpected characters (%s).', substr($scalar, $i)), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
                 }

Tests/InlineTest.php

@@ -748,4 +748,13 @@ public function testTagWithEmptyValueInMapping()
         $this->assertSame('bar', $value['foo']->getTag());
         $this->assertSame('', $value['foo']->getValue());
     }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessage Unexpected end of line, expected one of ",}" at line 1 (near "{abc: 'def'").
+     */
+    public function testUnfinishedInlineMap()
+    {
+        Inline::parse("{abc: 'def'");
+    }
 }