76bff1e198
UnboxedFieldBitmap was relying that shifting operations would result in 0 if `position` is larger than the number of bits in the bitmap, but this is UB. Closes https://github.com/dart-lang/sdk/pull/41422 https://github.com/dart-lang/sdk/pull/41422 GitOrigin-RevId: 7b6db75ee9247cee54345add6d155f55a501e79e Change-Id: I27c6fcadb2149826de86067c2378cef57ee3367c Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/143000 Commit-Queue: Martin Kustermann <kustermann@google.com> Reviewed-by: Martin Kustermann <kustermann@google.com>