Fixed bug #80030

NEWS

@@ -15,6 +15,10 @@ PHP                                                                        NEWS
 - Fileinfo:
   . Upgrade to libmagic 5.39. (Anatol)
 
+- Opcache:
+  . Fixed bug #80030 (Optimizer segfault with isset on static property with
+    undef dynamic class name). (Nikita)
+
 20 Aug 2020, PHP 8.0.0beta2
 
 - SPL:

Zend/tests/bug80030.phpt

@@ -0,0 +1,19 @@
+--TEST--
+Bug #80030: Optimizer segfault with isset on static property with undef dynamic class name
+--FILE--
+<?php
+
+function test() {
+    var_dump(isset($className::$test));
+}
+test();
+
+?>
+--EXPECTF--
+Warning: Undefined variable $className in %s on line %d
+
+Fatal error: Uncaught Error: Class name must be a valid object or a string in %s:%d
+Stack trace:
+#0 %s(%d): test()
+#1 {main}
+  thrown in %s on line %d

ext/opcache/Optimizer/zend_optimizer.c

@@ -377,6 +377,7 @@ int zend_optimizer_update_op2_const(zend_op_array *op_array,
 		case ZEND_FETCH_STATIC_PROP_UNSET:
 		case ZEND_FETCH_STATIC_PROP_FUNC_ARG:
 		case ZEND_UNSET_STATIC_PROP:
+		case ZEND_ISSET_ISEMPTY_STATIC_PROP:
 		case ZEND_PRE_INC_STATIC_PROP:
 		case ZEND_PRE_DEC_STATIC_PROP:
 		case ZEND_POST_INC_STATIC_PROP: