UndefinedConstant when using enum property as const array key

[Brajk19]

When using Enum::CASE->value or Enum::CASE->name as key in constant, psalm throws UndefinedConstant error.
No error is thrown when enum property is used as key in regular array (not const).

https://psalm.dev/r/3307971eb7

[psalm-github-bot]

I found these snippets:

https://psalm.dev/r/3307971eb7

<?php

enum MyEnum: int
{
    case CASE_1 = 3;
    case CASE_2 = 4;
}

class A {
    public const MY_CONST = [
        MyEnum::CASE_1->value => 'enum case 1',
        MyEnum::CASE_2->value => 'enum case 1',
    ];
}

class B {
    public const MY_CONST = [
        3 => 'enum case 1',
        4 => 'enum case 1',
    ];
}


echo A::MY_CONST[MyEnum::CASE_1->value];
echo B::MY_CONST[MyEnum::CASE_1->value];

Psalm output (using commit c8f7b7e):

ERROR: UndefinedConstant - 24:6 - Constant A::MY_CONST is not defined

INFO: MixedArrayAccess - 24:6 - Cannot access array value on mixed variable A::MY_CONST

INFO: MixedArgument - 24:6 - Argument 1 of echo cannot be mixed, expecting string

[weirdan]

The linked commit looks like it should fix it.

[ygottschalk]

Still working on it, did not really fix the issue. PR should be incoming today