From 1db734db6663ffd2f0e5294976e41e2d0f0855f0 Mon Sep 17 00:00:00 2001
From: Dmitriy Derepko <xepozz@list.ru>
Date: Tue, 6 May 2025 21:48:59 +0300
Subject: [PATCH] fix: disallow using multiple throw expressions

---
 Zend/tests/throw/throw_throw_throw.phpt | 12 ++++++++++++
 Zend/zend_compile.c                     |  4 ++++
 2 files changed, 16 insertions(+)
 create mode 100644 Zend/tests/throw/throw_throw_throw.phpt

diff --git a/Zend/tests/throw/throw_throw_throw.phpt b/Zend/tests/throw/throw_throw_throw.phpt
new file mode 100644
index 0000000000000..c4d765acc9f7f
--- /dev/null
+++ b/Zend/tests/throw/throw_throw_throw.phpt
@@ -0,0 +1,12 @@
+--TEST--
+throw throw guard
+--FILE--
+<?php
+
+try {
+    throw throw new Exception;
+} catch (Exception $e) {
+}
+?>
+--EXPECTF--
+Fatal error: Cannot throw throw expression in %s on line %d
\ No newline at end of file
diff --git a/Zend/zend_compile.c b/Zend/zend_compile.c
index cb64729806a23..2bdcb87b2d012 100644
--- a/Zend/zend_compile.c
+++ b/Zend/zend_compile.c
@@ -5746,6 +5746,10 @@ static void zend_compile_throw(znode *result, zend_ast *ast) /* {{{ */
 {
 	zend_ast *expr_ast = ast->child[0];
 
+    if (expr_ast->kind == ZEND_AST_THROW) {
+        zend_error_noreturn(E_COMPILE_ERROR, "Cannot throw throw expression");
+    }
+
 	znode expr_node;
 	zend_compile_expr(&expr_node, expr_ast);