minor #22105 [Yaml] Fix error handling on ini file parsing (chalasr)

This PR was merged into the 3.3-dev branch.

Discussion
----------

[Yaml] Fix error handling on ini file parsing

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

Should make travis green again on master.
/cc @xabbuh

Commits
-------

71cec82 [Yaml] Fix error handling in parser

src/Symfony/Component/Yaml/Parser.php

@@ -341,7 +341,7 @@ class Parser
                         try {
                             $parsedLine = Inline::parse($line, $flags, $this->refs);
 
-                            if (!is_string($value)) {
+                            if (!is_string($parsedLine)) {
                                 $parseError = true;
                                 break;
                             }

src/Symfony/Component/Yaml/Tests/ParserTest.php

@@ -1687,6 +1687,21 @@ YAML;
         $this->parser->parse($yaml);
     }
 
+    /**
+     * @expectedException        \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessage Unable to parse at line 1 (near "[parameters]").
+     */
+    public function testParsingIniThrowsException()
+    {
+        $ini = <<<INI
+[parameters]
+  foo = bar
+  bar = %foo%
+INI;
+
+        $this->parser->parse($ini);
+    }
+
     private function loadTestsFromFixtureFiles($testsFile)
     {
         $parser = new Parser();