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{ %OPT=-gh }
{$ifdef fpc}
{$mode objfpc}
{$endif fpc}
uses
classes;
type
to1 = class(TObject,IInterface)
fi : TInterfacedObject;
property i : TInterfacedObject read fi implements IInterface;
end;
var
o1 : to1;
i1,i2 : IInterface;
begin
o1:=to1.create;
o1.fi:=TInterfacedObject.Create;
writeln('o1 and o1.fi created');
i1:=o1;
i1.QueryInterface(IInterface,i2);
writeln('i2 queried the first time');
if i2=nil then
halt(1);
writeln('setting o1.fi to nil');
o1.fi:=nil;
writeln('o1.fi niled');
try
i1.QueryInterface(IInterface,i2);
writeln('i2 queried the second time');
if i2=nil then
halt(1);
except
o1.free;
writeln('ok');
halt(0);
end;
halt(1)
end.
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