Revert where previous_execute_data is nulled

Author: trowski

Zend/zend_fibers.c

@@ -541,7 +541,6 @@ static zend_always_inline zend_fiber_transfer zend_fiber_switch_to(
 
 	if (from) {
 		from->execute_data = EG(current_execute_data);
-		from->stack_bottom->prev_execute_data = NULL;
 	}
 
 	zend_fiber_switch_context(&transfer);
@@ -746,6 +745,8 @@ ZEND_METHOD(Fiber, suspend)
 
 	ZEND_ASSERT(fiber->context.status == ZEND_FIBER_STATUS_RUNNING || fiber->context.status == ZEND_FIBER_STATUS_SUSPENDED);
 
+	fiber->stack_bottom->prev_execute_data = NULL;
+
 	zend_fiber_transfer transfer = zend_fiber_suspend(fiber, value);
 
 	zend_fiber_delegate_transfer_result(&transfer, INTERNAL_FUNCTION_PARAM_PASSTHRU);