Optimized optimizer.

Added test for default with variadic arguments.

Author: Bilge

Zend/Optimizer/optimize_func_calls.c

@@ -117,9 +117,9 @@ static void zend_try_inline_call(zend_op_array *op_array, zend_op *fcall, zend_o
 				} while (i < func->op_array.num_args);
 			}
 
-			for (i = 0; i < op_array->last; i++) {
+			for (zend_op *op = fcall + 1; op != opline; ++op) {
 				// Don't inline calls with explicit default arguments.
-				if (op_array->opcodes[i].opcode == ZEND_FETCH_DEFAULT_ARG) {
+				if (op->opcode == ZEND_FETCH_DEFAULT_ARG) {
 					return;
 				}
 			}

Zend/tests/default_expression/variadic.phpt

@@ -0,0 +1,11 @@
+--TEST--
+Tests passing default to a variadic parameter
+--FILE--
+<?php
+
+(fn (...$V) => $V)(default);
+?>
+--EXPECTF--
+Fatal error: Uncaught ValueError: Cannot pass default to undeclared parameter 1 of {closure:%s:%d}() in %s:%d
+Stack trace:
+%a