Merge branch 'PHP-8.0'

* PHP-8.0:
  Fix infinite recursion in unlinked_instanceof

1 files changed, 17 insertions, 0 deletions

diff --git a/Zend/tests/type_declarations/variance/infinite_recursion.phpt b/Zend/tests/type_declarations/variance/infinite_recursion.phpt
new file mode 100644
index 0000000000..6eab6ff7a5
--- /dev/null
+++ b/Zend/tests/type_declarations/variance/infinite_recursion.phpt
@@ -0,0 +1,17 @@
+--TEST--
+Infinite recursion in unlinked_instanceof()
+--FILE--
+<?php
+interface I {}
+spl_autoload_register(function() {
+    class X {
+        function test(): I {}
+    }
+    class Y extends X {
+        function test(): C {}
+    }
+});
+class C extends Z implements C {}
+?>
+--EXPECTF--
+Fatal error: Declaration of Y::test(): C must be compatible with X::test(): I in %s on line %d