e656fec1ee
E.g. the user typing "1_234e" (and having yet to type a number) would crash the analyzer. Change-Id: Iff71c274a5e4719b3c8877ddbc9775d8d091c42f Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/437240 Reviewed-by: Johnni Winther <johnniwinther@google.com> Reviewed-by: Lasse Nielsen <lrn@google.com> Commit-Queue: Jens Johansen <jensj@google.com> Reviewed-by: Samuel Rawlins <srawlins@google.com>