Paul Berry
ab16d79af9
This reverts commit d833f2f65c.
Reason for revert: Broke build, e.g. https://ci.chromium.org/p/dart/builders/ci/dart-sdk-mac/12688
Original change's description:
> Flow analysis changes to fix mixed-mode unsoundness loophole.
>
> This is the flow analysis portion of the fix to
> https://github.com/dart-lang/language/issues/1143. Follow-up changes
> will be needed in the CFE and/or backends to ensure that exceptions
> are thrown under appropriate circumstances.
>
> This CL also makes some improvements to flow analysis's reachability
> analysis so that it accounts for nullability of the target when
> analyzing the reachability of `??=` and `?.`. Hopefully these
> improvements should make the fix to
> https://github.com/dart-lang/language/issues/1143 clearer and more
> consistent.
>
> Change-Id: I5fa5c070f13fd57ac4c2fb87f2d67588861594b0
> Bug: https://github.com/dart-lang/language/issues/1143
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/160440
> Reviewed-by: Konstantin Shcheglov <scheglov@google.com>
> Reviewed-by: Johnni Winther <johnniwinther@google.com>
> Commit-Queue: Paul Berry <paulberry@google.com>
TBR=paulberry@google.com,scheglov@google.com,johnniwinther@google.com
Change-Id: If1215b19975e0958d612dd69767088095d853879
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: https://github.com/dart-lang/language/issues/1143
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/161580
Reviewed-by: Paul Berry <paulberry@google.com>