'--checked' and '--strong' accidentally lowered []= to HIndexAssign,
in effect removing the check on the parametric covariant argument.
This makes --checked slower for some array-update-intensive
benchmarks.
Change-Id: I8c36e1db15ac6a98e1ec9ca01b2ebdd3effafc1b
Reviewed-on: https://dart-review.googlesource.com/51802
Commit-Queue: Stephen Adams <sra@google.com>
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Stephen Adams
2f9f8088b5