The class hierarchy analysis maintains, for each class, a map from raw
supertypes to actual, parameterized supertypes. As an optimization, it
can share these maps between a class and one of its subclasses.
However, the sharing/copying mechanism sometimes ends up with entries
in the map that should not have been there.
This commit removes the optimization and always uses a separate map
for each class.
Closes https://github.com/dart-lang/sdk/issues/31996
Change-Id: I4c641d9c7d15706035791dd2b586a24045afceaa
Reviewed-on: https://dart-review.googlesource.com/39765
Commit-Queue: Aske Simon Christensen <askesc@google.com>
Reviewed-by: Kevin Millikin <kmillikin@google.com>
Aske Simon Christensen
aa85b09931