Closed
Description
original #23992
trait Foo {
type Bar;
fn foo(self) -> Self::Bar;
}
impl Foo for Box<Foo> {
type Bar = <Self as Foo>::Bar;
fn foo(self) -> <Self as Foo>::Bar {
(*self).foo()
}
}Version information
rustc 1.78.0-nightly (5aad51d01 2024-03-12)
binary: rustc
commit-hash: 5aad51d015b8d3f6d823a6bf9dbc8ae3b9fd10c5
commit-date: 2024-03-12
host: x86_64-unknown-linux-gnu
release: 1.78.0-nightly
LLVM version: 18.1.0
Command:
/home/matthias/.rustup/toolchains/master/bin/rustc
Program output
error[E0601]: `main` function not found in crate `23992`
--> 23992.rs:11:2
|
11 | }
| ^ consider adding a `main` function to `23992.rs`
warning: trait objects without an explicit `dyn` are deprecated
--> 23992.rs:6:18
|
6 | impl Foo for Box<Foo> {
| ^^^
|
= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
= note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
= note: `#[warn(bare_trait_objects)]` on by default
help: if this is an object-safe trait, use `dyn`
|
6 | impl Foo for Box<dyn Foo> {
| +++
error[E0191]: the value of the associated type `Bar` in `Foo` must be specified
--> 23992.rs:6:18
|
2 | type Bar;
| -------- `Bar` defined here
...
6 | impl Foo for Box<Foo> {
| ^^^ help: specify the associated type: `Foo<Bar = Type>`
error: rustc interrupted by SIGSEGV, printing backtrace
/home/matthias/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/librustc_driver-005b29bff0c132ec.so(+0x2ea3573)[0x7fb48cca3573]
/usr/lib/libc.so.6(+0x40770)[0x7fb489b31770]
/home/matthias/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/librustc_driver-005b29bff0c132ec.so(_RNvXs0_NtCslkfv2LWTlR7_14rustc_ty_utils12opaque_typesNtB5_19OpaqueTypeCollectorINtNtCs1WKmo3440Fy_13rustc_type_ir5visit11TypeVisitorNtNtNtCs8laOuMcdVHv_12rustc_middle2ty7context6TyCtxtE8visit_ty+0x1e)[0x7fb48b79f28e]
/home/matthias/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/librustc_driver-005b29bff0c132ec.so(_RNvXs0_NtCslkfv2LWTlR7_14rustc_ty_utils12opaque_typesNtB5_19OpaqueTypeCollectorINtNtCs1WKmo3440Fy_13rustc_type_ir5visit11TypeVisitorNtNtNtCs8laOuMcdVHv_12rustc_middle2ty7context6TyCtxtE8visit_ty+0x1efa)[0x7fb48b7a116a]
### cycle encountered after 4 frames with period 5
/home/matthias/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/librustc_driver-005b29bff0c132ec.so(_RNvXs0_NtCslkfv2LWTlR7_14rustc_ty_utils12opaque_typesNtB5_19OpaqueTypeCollectorINtNtCs1WKmo3440Fy_13rustc_type_ir5visit11TypeVisitorNtNtNtCs8laOuMcdVHv_12rustc_middle2ty7context6TyCtxtE8visit_ty+0xfe0)[0x7fb48b7a0250]
/home/matthias/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/librustc_driver-005b29bff0c132ec.so(_RNvXs0_NtCslkfv2LWTlR7_14rustc_ty_utils12opaque_typesNtB5_19OpaqueTypeCollectorINtNtCs1WKmo3440Fy_13rustc_type_ir5visit11TypeVisitorNtNtNtCs8laOuMcdVHv_12rustc_middle2ty7context6TyCtxtE8visit_ty+0xfe0)[0x7fb48b7a0250]
/home/matthias/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/librustc_driver-005b29bff0c132ec.so(_RNvXs0_NtCslkfv2LWTlR7_14rustc_ty_utils12opaque_typesNtB5_19OpaqueTypeCollectorINtNtCs1WKmo3440Fy_13rustc_type_ir5visit11TypeVisitorNtNtNtCs8laOuMcdVHv_12rustc_middle2ty7context6TyCtxtE8visit_ty+0xfe0)[0x7fb48b7a0250]
/home/matthias/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/librustc_driver-005b29bff0c132ec.so(_RNvXs0_NtCslkfv2LWTlR7_14rustc_ty_utils12opaque_typesNtB5_19OpaqueTypeCollectorINtNtCs1WKmo3440Fy_13rustc_type_ir5visit11TypeVisitorNtNtNtCs8laOuMcdVHv_12rustc_middle2ty7context6TyCtxtE8visit_ty+0xfe0)[0x7fb48b7a0250]
/home/matthias/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/librustc_driver-005b29bff0c132ec.so(_RNvXs0_NtCslkfv2LWTlR7_14rustc_ty_utils12opaque_typesNtB5_19OpaqueTypeCollectorINtNtCs1WKmo3440Fy_13rustc_type_ir5visit11TypeVisitorNtNtNtCs8laOuMcdVHv_12rustc_middle2ty7context6TyCtxtE8visit_ty+0xfe0)[0x7fb48b7a0250]
### recursed 50 times
/home/matthias/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/librustc_driver-005b29bff0c132ec.so(_RNvXs0_NtCslkfv2LWTlR7_14rustc_ty_utils12opaque_typesNtB5_19OpaqueTypeCollectorINtNtCs1WKmo3440Fy_13rustc_type_ir5visit11TypeVisitorNtNtNtCs8laOuMcdVHv_12rustc_middle2ty7context6TyCtxtE8visit_ty+0xfe0)[0x7fb48b7a0250]
/home/matthias/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/librustc_driver-005b29bff0c132ec.so(_RNvXs0_NtCslkfv2LWTlR7_14rustc_ty_utils12opaque_typesNtB5_19OpaqueTypeCollectorINtNtCs1WKmo3440Fy_13rustc_type_ir5visit11TypeVisitorNtNtNtCs8laOuMcdVHv_12rustc_middle2ty7context6TyCtxtE8visit_ty+0xfe0)[0x7fb48b7a0250]
note: rustc unexpectedly overflowed its stack! this is a bug
note: maximum backtrace depth reached, frames may have been lost
note: we would appreciate a report at https://github.com/rust-lang/rust
[1] 134294 segmentation fault rustc 23992.rs