When we landed null-safety we accidentally disabled internal self-testing in YamlEditor.
We fixed this in: https://github.com/dart-lang/tools/pull/2284
But this was reverted because this test broke. With this we should able to land:
https://github.com/dart-lang/tools/pull/2299
TL;DR: `YamlEditor.update` may throw `AssertionError` if it has an internal error.
Internal errors in `YamlEditor` should not happen, but we have bugs.
There is open PRs to fix some of those bugs, but in practice it's not unlikely
that there will always be bugs. We're modifying YAML source using `SourceSpan`s
from the YAML parser. Changes in the parser, surprising corner cases, complex modifications
or combinations of these can probably cause internal errors.
These internal errors happens when:
* The result YAML output is invalid YAML.
* The resulting YAML doesn't match the same semantic modification on the original YAML structure, when compared with deep equals.
Change-Id: I159b37e9a9f039f92c82881ccac2c4826332f816
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/471460
Reviewed-by: Samuel Rawlins <srawlins@google.com>
Commit-Queue: Jonas Jensen <jonasfj@google.com>
Jonas Finnemann Jensen
bd2770e9eb