From a050ff2878387dbe4aa5f4dd66c82f6b83416630 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Maximilian=20B=C3=B6sing?=
 <2189546+boesing@users.noreply.github.com>
Date: Sun, 26 Sep 2021 16:23:38 +0200
Subject: [PATCH] bugfix: quote regular expression
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Signed-off-by: Maximilian Bösing <2189546+boesing@users.noreply.github.com>
---
 src/Psalm/Internal/Type/SimpleAssertionReconciler.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Psalm/Internal/Type/SimpleAssertionReconciler.php b/src/Psalm/Internal/Type/SimpleAssertionReconciler.php
index 50db0595c..2da742187 100644
--- a/src/Psalm/Internal/Type/SimpleAssertionReconciler.php
+++ b/src/Psalm/Internal/Type/SimpleAssertionReconciler.php
@@ -50,6 +50,7 @@ use function get_class;
 use function max;
 use function min;
 use function preg_match;
+use function preg_quote;
 use function sprintf;
 use function str_replace;
 use function strpos;
@@ -2419,7 +2420,7 @@ class SimpleAssertionReconciler extends \Psalm\Type\Reconciler
             return $existing_type;
         }
 
-        $constant_regex_pattern = sprintf('#^%s$#', str_replace('*', '.*', $constant_pattern));
+        $constant_regex_pattern = sprintf('#^%s$#', preg_quote(str_replace('*', '.*', $constant_pattern), '#'));
 
         $class_like_storage = $codebase->classlike_storage_provider->get($class_name);
         $matched_class_constant_types = [];