Merge branch '4.3' into 4.4

* 4.3:
  [Debug] fix ClassNotFoundFatalErrorHandler
  [Routing] Fix using a custom matcher & generator dumper class
  [Dotenv] Fixed infinite loop with missing quote followed by quoted value
  [HttpClient] Added missing sprintf
  [TwigBridge] button_widget now has its title attr translated even if its label = null or false
  [PhpUnitBridge] When using phpenv + phpenv-composer plugin, composer executable is wrapped into a bash script
  [Messenger] Added check if json_encode succeeded
  [Security] Prevent canceled remember-me cookie from being accepted
  [FrameworkBundle][TranslationUpdateCommand] Do not output positive feedback on stderr
  [Security\Guard] Fix missing typehints

Dotenv.php

@@ -277,7 +277,10 @@ private function lexValue(): string
                 $this->cursor += 1 + $len;
             } elseif ('"' === $this->data[$this->cursor]) {
                 $value = '';
-                ++$this->cursor;
+
+                if (++$this->cursor === $this->end) {
+                    throw $this->createFormatException('Missing quote to end the value');
+                }
 
                 while ('"' !== $this->data[$this->cursor] || ('\\' === $this->data[$this->cursor - 1] && '\\' !== $this->data[$this->cursor - 2])) {
                     $value .= $this->data[$this->cursor];

Tests/DotenvTest.php

@@ -40,6 +40,7 @@ public function getEnvDataWithFormatErrors()
             ['FOO', "Missing = in the environment variable declaration in \".env\" at line 1.\n...FOO...\n     ^ line 1 offset 3"],
             ['FOO="foo', "Missing quote to end the value in \".env\" at line 1.\n...FOO=\"foo...\n          ^ line 1 offset 8"],
             ['FOO=\'foo', "Missing quote to end the value in \".env\" at line 1.\n...FOO='foo...\n          ^ line 1 offset 8"],
+            ["FOO=\"foo\nBAR=\"bar\"", "Missing quote to end the value in \".env\" at line 1.\n...FOO=\"foo\\nBAR=\"bar\"...\n                     ^ line 1 offset 18"],
             ['FOO=\'foo'."\n", "Missing quote to end the value in \".env\" at line 1.\n...FOO='foo\\n...\n            ^ line 1 offset 9"],
             ['export FOO', "Unable to unset an environment variable in \".env\" at line 1.\n...export FOO...\n            ^ line 1 offset 10"],
             ['FOO=${FOO', "Unclosed braces on variable expansion in \".env\" at line 1.\n...FOO=\${FOO...\n           ^ line 1 offset 9"],