Added regression test

Author: staabm

tests/PHPStan/Rules/DeadCode/UnreachableStatementRuleTest.php

@@ -355,4 +355,10 @@ public function testBug13288(): void
 		$this->analyse([__DIR__ . '/data/bug-13288.php'], []);
 	}
 
+	public function testBug13311(): void
+	{
+		$this->treatPhpDocTypesAsCertain = false;
+		$this->analyse([__DIR__ . '/data/bug-13311.php'], []);
+	}
+
 }

tests/PHPStan/Rules/DeadCode/data/bug-13311.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace Bug13311;
+
+use Exception;
+
+$error_handler = static function () { throw new Exception(); };
+set_error_handler($error_handler, \E_NOTICE | \E_WARNING);
+
+try {
+	$out = iconv($from, $to . $iconv_options, $str);
+} catch (Throwable $e) {
+	$out = false;
+}