Examples requiring a nonexistent feature should be an error

[whitequark]

I.e. this:

[features]
foo = []

[[example]]
name = "bar"
required-features = ["baz"]

currently just silently doesn't compile bar unless explicitly forced with cargo --example bar.

[stale]

As there hasn't been any activity here in over 6 months I've marked this as stale and if no further activity happens for 7 days I will close it.

I'm a bot so this may be in error! If this issue should remain open, could someone (the author, a team member, or any interested party) please comment to that effect?

The team would be especially grateful if such a comment included details such as:

• Is this still relevant?
• If so, what is blocking it?
• Is it known what could be done to help move this forward?

Thank you for contributing!

(The cargo team is currently evaluating the use of Stale bot, and using #6035 as the tracking issue to gather feedback.)

If you're reading this comment from the distant future, fear not if this was closed automatically. If you believe it's still an issue please leave a comment and a team member can reopen this issue. Opening a new issue is also acceptable!

[dwijnand]

The comment in the associated #4874 seems to indicate this issue is invalid?

Could someone with a slightly better understanding comment?

[whitequark]

@dwijnand No, this is not invalid. #4874 wasn't going far enough, it should have checked only features without / in them against the [features] section.