FPC 3.2.4 IE 200510032 x64

FPC 3.2.4, target x64, tested only on Windows

---

program app;
{$mode objfpc}

uses
  unit1;

var
  R: TAdvRec;
  B: Boolean;

begin
  if (test(R) < 1) or B then;
end.

unit unit1;
{$modeswitch advancedrecords}

interface

type
  TAdvRec = record
    B: Boolean;
    class operator := (v1: TAdvRec): NativeInt;
    class operator := (v1: Single): TAdvRec;
    class operator <(v1, v2: TAdvRec): Boolean;
  end;

function test(v1: TAdvRec): TAdvRec;

implementation

function test(v1: TAdvRec): TAdvRec; inline;
begin
  if v1.B then raise TObject.Create;
end;

function dummy(v1: TAdvRec): Boolean;
begin
end;

class operator TAdvRec.<(v1, v2: TAdvRec): boolean; inline;
begin
  dummy(v1);
end;

class operator TAdvRec.:=(v1: TAdvRec): NativeInt;
begin
end;

class operator TAdvRec.:=(v1: Single): TAdvRec;
begin
end;

end.

Compile:
C:\lazarus324\fpc\3.2.4\bin\x86_64-win64\fpc.exe -OoLEVEL2 -OoDFA app.pas

Result: Error: Internal error 200510032

The sample for work was taken from the forum: link

There were various other errors during the simplification process. But I will test them after solving this one, as I suspect they are related, so as not to do unnecessary work, I will wait until this problem is solved.