File: ptr-to-trait-obj-different-regions-id-trait.current.stderr

package info (click to toggle)
rustc 1.85.0%2Bdfsg3-1
  • links: PTS, VCS
  • area: main
  • in suites: experimental, sid, trixie
  • size: 893,396 kB
  • sloc: xml: 158,127; python: 35,830; javascript: 19,497; cpp: 19,002; sh: 17,245; ansic: 13,127; asm: 4,376; makefile: 1,051; perl: 29; lisp: 29; ruby: 19; sql: 11
file content (15 lines) | stat: -rw-r--r-- 729 bytes parent folder | download | duplicates (6)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
error: lifetime may not live long enough
  --> $DIR/ptr-to-trait-obj-different-regions-id-trait.rs:24:27
   |
LL | fn m<'a>() {
   |      -- lifetime `'a` defined here
LL |     let unsend: *const dyn Cat<'a> = &();
LL |     let _send = unsend as *const S<dyn Cat<'static>>;
   |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^ type annotation requires that `'a` must outlive `'static`
   |
   = note: requirement occurs because of the type `S<dyn Cat<'_>>`, which makes the generic argument `dyn Cat<'_>` invariant
   = note: the struct `S<T>` is invariant over the parameter `T`
   = help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance

error: aborting due to 1 previous error