Missing error when attempting to fetch by reference an array element of a readonly property

[claudepache]

Bug report

PHPStan correctly complains when attempting to fetch a reference of a readonly property. However, it misses the case of attempting to fetch a reference of an array element of a readonly property, as in: https://3v4l.org/XMZr5

Code snippet that reproduces the problem

https://phpstan.org/r/3b8febb3-2a26-4245-be09-4a40868587cc

Expected output

The error on line 15 should also occur on lines 16 and 17.

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