57c414868e
This fixes https://github.com/dart-lang/sdk/issues/60005 caused by `source!` by instead handling the null. However, it leaves navigation still not-working for these synthetic parameters (see failing tests). Change-Id: I793130a9533ccf97b523a50d74375ebf6dead7e3 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/411600 Reviewed-by: Konstantin Shcheglov <scheglov@google.com> Reviewed-by: Brian Wilkerson <brianwilkerson@google.com> Commit-Queue: Brian Wilkerson <brianwilkerson@google.com>