bug symfony#52408 [Yaml] Fix block scalar array parsing (NickSdot)

This PR was merged into the 5.4 branch.

Discussion
----------

[Yaml] Fix block scalar array parsing

| Q             | A
| ------------- | ---
| Branch?       | 5.4
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Issues        |
| License       | MIT

Commits
-------

1a58df8 Fix block scalar array parsing

Author: nicolas-grekas

src/Symfony/Component/Yaml/Parser.php

@@ -199,9 +199,8 @@ private function doParse(string $value, int $flags)
                             || self::preg_match('#^(?P<key>'.Inline::REGEX_QUOTED_STRING.'|[^ \'"\{\[].*?) *\:(\s+(?P<value>.+?))?\s*$#u', $this->trimTag($values['value']), $matches)
                         )
                     ) {
-                        // this is a compact notation element, add to next block and parse
                         $block = $values['value'];
-                        if ($this->isNextLineIndented()) {
+                        if ($this->isNextLineIndented() || isset($matches['value']) && '>-' === $matches['value']) {
                             $block .= "\n".$this->getNextEmbedBlock($this->getCurrentLineIndentation() + \strlen($values['leadspaces']) + 1);
                         }
 
@@ -949,6 +948,10 @@ private function isNextLineIndented(): bool
         } while (!$EOF && ($this->isCurrentLineEmpty() || $this->isCurrentLineComment()));
 
         if ($EOF) {
+            for ($i = 0; $i < $movements; ++$i) {
+                $this->moveToPreviousLine();
+            }
+
             return false;
         }
 

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

@@ -2690,6 +2690,44 @@ public static function circularReferenceProvider()
         return $tests;
     }
 
+    public function testBlockScalarArray()
+    {
+        $yaml = <<<'YAML'
+anyOf:
+  - $ref: >-
+      #/string/bar
+anyOfMultiline:
+  - $ref: >-
+      #/string/bar
+      second line
+nested:
+  anyOf:
+    - $ref: >-
+        #/string/bar
+YAML;
+        $expected = [
+            'anyOf' => [
+                0 => [
+                    '$ref' => '#/string/bar',
+                ],
+            ],
+            'anyOfMultiline' => [
+                0 => [
+                    '$ref' => '#/string/bar second line',
+                ],
+            ],
+            'nested' => [
+                'anyOf' => [
+                    0 => [
+                        '$ref' => '#/string/bar',
+                    ],
+                ],
+            ],
+        ];
+
+        $this->assertSame($expected, $this->parser->parse($yaml));
+    }
+
     /**
      * @dataProvider indentedMappingData
      */