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fix: disallow using multiple throw expressions #18512

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fix: disallow using multiple throw expressions #18512

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12 changes: 12 additions & 0 deletions Zend/tests/throw/throw_throw_throw.phpt
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Original file line number Diff line number Diff line change
@@ -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
4 changes: 4 additions & 0 deletions Zend/zend_compile.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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);

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