Dictionary of Pair of Dictionary causes XE7 compiler crash

[Jens Mühlenhoff]

It took me a while to identify this one, it was the show stopper for us to upgrade to XE7:

program Project1;

{$APPTYPE CONSOLE}

{$R *.res}

uses
  System.SysUtils,
  System.Generics.Collections,
  Spring.Collections;

type
  Baz = IDictionary<IInterface, IInterface>;
  Bar = TPair<Integer, Baz>;
  Foo = IDictionary<TObject, Bar>;

begin

end.

I'm using the current HEAD of the develop branch c5382d8b97ac27745ec144f808182857a45aeed9

This causes the compiler to AV at the linking stage (but only in Debug configurations!).

The exact error message: [dcc32 Fataler Fehler] F2084 Interner Fehler: AV0DA1F9CE-R00000498-0

I have Delphi XE 7 Update 1 installed.

[Stefan Glienke]

I was able to reduce it a bit more to not only occur with Spring4D.

Surprisingly that issue is already open for quite a while - but it seems it lacked a proper example to reproduce: https://quality.embarcadero.com/browse/RSP-9971

Apart from that I guess unfortunately we cannot do anything else from our side.

[Jens Mühlenhoff]

No problem, since it's easy to work around. I just replaced TPair with a non-generic custom record type that holds a key and a value.

The most trouble was to find the bug in the first place.

The ball is now on Embarcaderos side.