In the migration tool, it's confusing that added hints don't turn red until after the migration is re-run.

[stereotype441]

The migration tool uses red highlighting to show text it's going to remove. This means that a hint such as /*!*/ applied to a type will be completely red, and a hint such as /*?*/ applied to a type will be completely red except for the ?.

When you click on an add /*!*/ hint or add /*?*/ hint button in the migration tool UI, it isn't immediately highlighted in red; it's not highlighted until you re-run migration from sources.

This is potentially confusing for users, because they may see the hint become red at a later time and wonder why.

This arose in the discussion around #44280.

[stereotype441]

As of 1c7fe71, the null safety migration tool has been removed from active development and retired. No further work on the tool is planned.

If you still need help, or you believe this issue has been closed in error, please feel free to reopen.