Update assertion in finalizer

Update assertion in finalizer

Kernel IR omits the implicit constructor when it is not needed,
e.g. in abstract classes. Update assertion in finalizer.

BUG=
R=regis@google.com

Committed: https://github.com/dart-lang/sdk/commit/47a479741f07a4b05f878b220779906c45e70e21

[hausner, 2017-01-09 20:16:01]

Description was changed from

==========
Eliminate unnecessary assert in finalizer

Kernel IR omits the implicit constructor when it is not needed,
e.g. in abstract classes. Eliminate an assertion that expects
at least the implicit constructor to be present in a class.

BUG=
==========

to

==========
Eliminate unnecessary assert in finalizer

Kernel IR omits the implicit constructor when it is not needed,
e.g. in abstract classes. Eliminate an assertion that expects
at least the implicit constructor to be present in a class.

BUG=
==========

[hausner, 2017-01-09 20:16:02]

hausner@google.com changed reviewers:
+ regis@google.com

[hausner, 2017-01-09 21:15:36]

Description was changed from

==========
Eliminate unnecessary assert in finalizer

Kernel IR omits the implicit constructor when it is not needed,
e.g. in abstract classes. Eliminate an assertion that expects
at least the implicit constructor to be present in a class.

BUG=
==========

to

==========
Update assertion in finalizer

Kernel IR omits the implicit constructor when it is not needed,
e.g. in abstract classes. Update assertion in finalizer.

BUG=
==========

[hausner, 2017-01-09 21:16:35]

As discussed offline, the assertion is still useful, so I added an exception to
accommodate the dart frontend.

[regis, 2017-01-09 21:19:02]

lgtm

[hausner, 2017-01-09 21:29:36]

Description was changed from

==========
Update assertion in finalizer

Kernel IR omits the implicit constructor when it is not needed,
e.g. in abstract classes. Update assertion in finalizer.

BUG=
==========

to

==========
Update assertion in finalizer

Kernel IR omits the implicit constructor when it is not needed,
e.g. in abstract classes. Update assertion in finalizer.

BUG=
R=regis@google.com

Committed:
https://github.com/dart-lang/sdk/commit/47a479741f07a4b05f878b220779906c45e70e21
==========

[hausner, 2017-01-09 21:29:36]

Committed patchset #2 (id:20001) manually as
47a479741f07a4b05f878b220779906c45e70e21 (presubmit successful).