Drop checkpoint that leaded to use after free

diff --git a/ext/opcache/Optimizer/zend_optimizer.c b/ext/opcache/Optimizer/zend_optimizer.c
index d5028bc3b259ea436640814e28265c3a1aaf009d..aa638032cae2ab8d9a186c6c4215b9ced95bf341 100644 (file)
--- a/ext/opcache/Optimizer/zend_optimizer.c
+++ b/ext/opcache/Optimizer/zend_optimizer.c
@@ -1375,7 +1375,6 @@ int zend_optimize_script(zend_script *script, zend_long optimization_level, zend
            (ZEND_OPTIMIZER_PASS_7 & optimization_level) &&
            zend_build_call_graph(&ctx.arena, script, &call_graph) == SUCCESS) {
                /* Optimize using call-graph */
-               void *checkpoint = zend_arena_checkpoint(ctx.arena);
                int i;
                zend_func_info *func_info;
 
@@ -1464,8 +1463,6 @@ int zend_optimize_script(zend_script *script, zend_long optimization_level, zend
                for (i = 0; i < call_graph.op_arrays_count; i++) {
                        ZEND_SET_FUNC_INFO(call_graph.op_arrays[i], NULL);
                }
-
-               zend_arena_release(&ctx.arena, checkpoint);
        } else {
                zend_optimize_op_array(&script->main_op_array, &ctx);