ChangeSwitchToMatchRector should be skipped when the result is used as a reference

[jlherren]

Bug Report

Subject	Details
Rector version	Rector version: 366f32 - released at 2025-10-07 00:20

In the example code linked below, ChangeSwitchToMatchRector is converting the switch to a match expression, but ignores that the result is used as a reference. References to expressions are not allowed in PHP.

In the original code $this->monday was set to 100 as expected, but the transformed code produces this:

Notice: Only variable references should be returned by reference in /in/7CEb0 on line 12
\Workload::__set_state(array(
   'monday' => 0,
   'tuesday' => 0,
))

Minimal PHP Code Causing Issue

https://getrector.com/demo/b0da2130-2499-41b8-9d41-5ba38b657ac3

Expected Behaviour

Rector should skip transforming this code.

[samsonasik]

ref https://3v4l.org/7CEb0