[fpc-pascal] Internal error 2019022201 from function reference

[Hairy Pixels]

This program gives internal compiler error 2019022201 (Free Pascal Compiler version 3.3.1 [2022/05/27] for aarch64). Something is wrong with the PPU. This is a very basic program using function references so  it seems unlikely it could not be known. Any ideas?

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{$mode objfpc}
{$modeswitch functionreferences}

unit function_ref_error;
interface

type
  TCallback = record
    proc: reference to procedure;
  end;

implementation

end.

Regards,
	Ryan Joseph