error[E0277]: the size for values of type `str` cannot be known at compilation time
  --> $DIR/trivial-bounds-leak.rs:12:25
   |
LL | fn cant_return_str() -> str {
   |                         ^^^ doesn't have a size known at compile-time
   |
   = help: the trait `std::marker::Sized` is not implemented for `str`
   = note: the return type of a function must have a statically known size

error[E0599]: no method named `test` found for type `i32` in the current scope
  --> $DIR/trivial-bounds-leak.rs:24:10
   |
LL |     3i32.test();
   |          ^^^^ method not found in `i32`
   |
   = help: items from traits can only be used if the trait is implemented and in scope
note: `Foo` defines an item `test`, perhaps you need to implement it
  --> $DIR/trivial-bounds-leak.rs:4:1
   |
LL | pub trait Foo {
   | ^^^^^^^^^^^^^

error[E0277]: the trait bound `i32: Foo` is not satisfied
  --> $DIR/trivial-bounds-leak.rs:25:15
   |
LL |     fn test(&self);
   |     --------------- required by `Foo::test`
...
LL |     Foo::test(&4i32);
   |               ^^^^^ the trait `Foo` is not implemented for `i32`

error[E0277]: the trait bound `i32: Foo` is not satisfied
  --> $DIR/trivial-bounds-leak.rs:26:22
   |
LL |     generic_function(5i32);
   |                      ^^^^ the trait `Foo` is not implemented for `i32`
...
LL | fn generic_function<T: Foo>(t: T) {}
   |                        --- required by this bound in `generic_function`

error: aborting due to 4 previous errors

Some errors have detailed explanations: E0277, E0599.
For more information about an error, try `rustc --explain E0277`.