af0e54cc21
See issue https://github.com/dart-lang/sdk/issues/43293 This doesn't fix the underlying issue with custom elements, but fixes the null-safety problem in strong mode. Change-Id: Ie6613db7ae472b066bdf6c21751aea57a163c47d Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/164641 Reviewed-by: Srujan Gaddam <srujzs@google.com> Commit-Queue: Sigmund Cherem <sigmund@google.com>