fixed vimeo#9401

ptomulik · Feb 26, 2023 · eae1a70 · eae1a70
1 parent 2652762
commit eae1a70
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/src/Psalm/Internal/TypeVisitor/TypeChecker.php b/src/Psalm/Internal/TypeVisitor/TypeChecker.php
@@ -348,6 +348,7 @@ public function checkTemplateParam(TTemplateParam $atomic): void
     {
         if ($this->prevent_template_covariance
             && strpos($atomic->defining_class, 'fn-') !== 0
+            && $atomic->defining_class !== 'class-string-map'
         ) {
             $codebase = $this->source->getCodebase();