E2571 Type parameter '%s' doesn't have class or interface constraint (Object Pascal)

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This occurs when the type constraint is not an interface or class type.


program E2571;
{E2571 Type parameter '%s' doesn't have a class or interface constraint}

{$APPTYPE CONSOLE}

uses
  SysUtils;

type
 MyRec<T> = record
    a: array [1..T] of Logint;
 end;

begin

end.