Add FAQ for NLL migration

[rust.git] / src / test / ui / consts / min_const_fn / min_const_fn_dyn.stderr

diff --git a/src/test/ui/consts/min_const_fn/min_const_fn_dyn.stderr b/src/test/ui/consts/min_const_fn/min_const_fn_dyn.stderr
index 8ff963722cf1519aac0a63523da678ab6f1b03c1..9ded93c16727ba5e881e22f37e1e56ffafc360e5 100644 (file)
--- a/src/test/ui/consts/min_const_fn/min_const_fn_dyn.stderr
+++ b/src/test/ui/consts/min_const_fn/min_const_fn_dyn.stderr
@@ -1,19 +1,35 @@
-error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable (see issue #57563)
+error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable
   --> $DIR/min_const_fn_dyn.rs:9:5
    |
 LL |     x.0.field;
    |     ^^^^^^^^^
    |
+   = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
    = help: add #![feature(const_fn)] to the crate attributes to enable
 
-error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable (see issue #57563)
+error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable
   --> $DIR/min_const_fn_dyn.rs:12:66
    |
 LL | const fn no_inner_dyn_trait_ret() -> Hide { Hide(HasDyn { field: &0 }) }
    |                                                                  ^^
    |
+   = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
    = help: add #![feature(const_fn)] to the crate attributes to enable
 
+warning[E0716]: temporary value dropped while borrowed
+  --> $DIR/min_const_fn_dyn.rs:12:67
+   |
+LL | const fn no_inner_dyn_trait_ret() -> Hide { Hide(HasDyn { field: &0 }) }
+   |                                                                  -^    - temporary value is freed at the end of this statement
+   |                                                                  ||
+   |                                                                  |creates a temporary which is freed while still in use
+   |                                                                  cast requires that borrow lasts for `'static`
+   |
+   = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
+   = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
+   = note: for more information, try `rustc --explain E0729`
+
 error: aborting due to 2 previous errors
 
-For more information about this error, try `rustc --explain E0723`.
+Some errors have detailed explanations: E0716, E0723.
+For more information about an error, try `rustc --explain E0716`.