This change reverts https://dart-review.googlesource.com/c/sdk/+/341020.
The reverted CL removed tests from `tests/language` that contained
legacy code (code with a language version less than 2.12). The primary
purpose of the removal was to unblock removal of legacy support from
the analyzer. It seemed safe to do because legacy code isn't supported
anymore, and no legacy code exists in google3 anymore. However,
several of those tests exercised important "weak mode" runtime
semantics of the web and VM platforms. See discussion at
https://dart-review.googlesource.com/c/sdk/+/341020/comments/bce31aa1_f5392ce1
for details.
This CL restores the deleted tests. Fortunately, since all the
restored tests are annotated with `Requirements=nnbd-weak`, they will
be skipped on the analyzer (thanks to
https://dart-review.googlesource.com/c/sdk/+/342080), so restoring
them no longer gets in the way of removing legacy support from the
analyzer.
Change-Id: Ib828be76f5c7eaeecaad0b7e7f7b0e3ff2f4bdb2
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/342090
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Commit-Queue: Paul Berry <paulberry@google.com>
Paul Berry
1de6bc74d2