[estebank]

error[E0310]: the parameter type `R` may not live long enough
  --> $DIR/implicit-static-lifetime-in-dyn-trait-return-type.rs:10:5
   |
LL | fn bb<R>(r: R) -> Box<dyn Foo> {
   |                       ------- this `dyn Trait` has an implicit `'static` lifetime bound
LL |     Box::new(Bar(r))
   |     ^^^^^^^^^^^^^^^^
   |     |
   |     the parameter type `R` must be valid for the static lifetime...
   |     ...so that the type `R` will meet its required lifetime bounds
   |
help: consider adding an explicit lifetime bound
   |
LL | fn bb<R: 'static>(r: R) -> Box<dyn Foo> {
   |        +++++++++
help: consider adding an explicit lifetime bound
   |
LL | fn bb<'a, R>(r: R) -> Box<dyn Foo + 'a> {
   |       +++                         ++++

Address some cases from #41966.

[rustbot]

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[rustbot]

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[estebank]

This should probably go on the impl like the 'static suggestion...

View changes since the review

[bushrat011899]

This all looks good to me, but I'm not a member of the compiler team so I don't feel comfortable leaving an approval here. Thanks for answering the couple questions I had!

View changes since this review

[rustbot]

This PR was rebased onto a different main commit. Here's a range-diff highlighting what actually changed.

Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers.