PR #3477 Add `#[must_use]` to Span.

Add `#[must_use]` to Span. #3477

raldone01 wants to merge 2 commits into tokio-rs:v0.2.x from raldone01:add-must-use-to-span

Add must use annotation to `Span` as in #3234.

e821257c

Bless test that changed due to different rust compiler version.

24963325

raldone01 requested a review from

hawkw 60 days ago

raldone01 requested a review from

carllerche 60 days ago

raldone01 requested a review from

davidbarsky 60 days ago

raldone01 requested a review 60 days ago

Reviewers

hawkw

carllerche

davidbarsky

Assignees

No one assigned

Labels

None yet

Milestone

No milestone