c3589b02b4
The implicit padding would not be initialized but would be scanned by GC. TEST=Manually tested with implicit padding. Change-Id: Ia3556d3e42a97fbb2d8f67541d2e7de9b7650077 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/494566 Reviewed-by: Slava Egorov <vegorov@google.com> Commit-Queue: Alexander Markov <alexmarkov@google.com> Reviewed-by: Ryan Macnak <rmacnak@google.com>