Rustdoc doesn't always show feature-gated types

[cdmistman]

miette has several types that are feature-gated, such as GraphicalReportHandler, which aren't shown as feature-gated in documentation.

I expected this:

to contain a box saying fancy-no-backtrace next to the GraphicalReportHandler link as shown eg in this screenshot from the tokio docs

[Noratrieb]

Tokio does this using an unstable feature called doc_cfg.

[GuillaumeGomez]

I'm waiting for help to finish the RFC. In the meantime, you can use doc_auto_cfg feature so it's filled automatically.

[GuillaumeGomez]

Tracking issue is #43781. Closing then.