[Issue 15823] opIndex doesn't work for const std.variant.Variant

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15823

--- Comment #1 from Maksim Zholudev <maxim...@gmail.com> ---
https://github.com/D-Programming-Language/phobos/pull/4112

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