Closed
Description
./src/test/ui/traits/alias/self-in-generics.rs
Code
#![feature(trait_alias)]
pub trait SelfInput = Fn(&mut Self);
pub fn f(_f: &dyn SelfInput) {}
//~^ ERROR the trait alias `SelfInput` cannot be made into an object [E0038]
fn main() {}Meta
rustc --version --verbose:
rustc 1.65.0-nightly (e8dc8bca2 2022-08-13)
binary: rustc
commit-hash: e8dc8bca2118ec1ed5970790614f0b81e9167f10
commit-date: 2022-08-13
host: x86_64-unknown-linux-gnu
release: 1.65.0-nightly
LLVM version: 15.0.0
Error output
rustc ./self-in-generics.rs -Zsave-analysis
<output>
Backtrace
error[E0038]: the trait alias `SelfInput` cannot be made into an object
--> ./self-in-generics.rs:5:19
|
5 | pub fn f(_f: &dyn SelfInput) {}
| ^^^^^^^^^
|
= note: it cannot use `Self` as a type parameter in a supertrait or `where`-clause
error: internal compiler error: /rustc/e8dc8bca2118ec1ed5970790614f0b81e9167f10/compiler/rustc_middle/src/ty/relate.rs:412:13: var types encountered in super_relate_tys
thread 'rustc' panicked at 'Box<dyn Any>', /rustc/e8dc8bca2118ec1ed5970790614f0b81e9167f10/compiler/rustc_errors/src/lib.rs:1391:9
stack backtrace:
0: 0x7f17d2a46220 - std::backtrace_rs::backtrace::libunwind::trace::hdfd7439c4ac437b8
at /rustc/e8dc8bca2118ec1ed5970790614f0b81e9167f10/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
1: 0x7f17d2a46220 - std::backtrace_rs::backtrace::trace_unsynchronized::h6c473f268a0da94d
at /rustc/e8dc8bca2118ec1ed5970790614f0b81e9167f10/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
2: 0x7f17d2a46220 - std::sys_common::backtrace::_print_fmt::h6b48bf233902d36b
at /rustc/e8dc8bca2118ec1ed5970790614f0b81e9167f10/library/std/src/sys_common/backtrace.rs:66:5
3: 0x7f17d2a46220 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h9b66d5b5ab6d8b74
at /rustc/e8dc8bca2118ec1ed5970790614f0b81e9167f10/library/std/src/sys_common/backtrace.rs:45:22
4: 0x7f17d2aa12ee - core::fmt::write::h8d6bde4a67b5a644
at /rustc/e8dc8bca2118ec1ed5970790614f0b81e9167f10/library/core/src/fmt/mod.rs:1202:17
5: 0x7f17d2a36f35 - std::io::Write::write_fmt::ha5ed2fe9bc688052
at /rustc/e8dc8bca2118ec1ed5970790614f0b81e9167f10/library/std/src/io/mod.rs:1672:15
6: 0x7f17d2a48ee3 - std::sys_common::backtrace::_print::hcc6babf718d978b5
at /rustc/e8dc8bca2118ec1ed5970790614f0b81e9167f10/library/std/src/sys_common/backtrace.rs:48:5
7: 0x7f17d2a48ee3 - std::sys_common::backtrace::print::h66a498b3cfc1608c
at /rustc/e8dc8bca2118ec1ed5970790614f0b81e9167f10/library/std/src/sys_common/backtrace.rs:35:9
8: 0x7f17d2a48ee3 - std::panicking::default_hook::{{closure}}::h78975c9fdf2e25ac
at /rustc/e8dc8bca2118ec1ed5970790614f0b81e9167f10/library/std/src/panicking.rs:295:22
9: 0x7f17d2a48bcf - std::panicking::default_hook::h3938825ac353f447
at /rustc/e8dc8bca2118ec1ed5970790614f0b81e9167f10/library/std/src/panicking.rs:314:9
10: 0x7f17d5285424 - <rustc_driver[a5410d64bf022668]::DEFAULT_HOOK::{closure#0}::{closure#0} as core[9ef3251603221d4a]::ops::function::FnOnce<(&core[9ef3251603221d4a]::panic::panic_info::PanicInfo,)>>::call_once::{shim:vtable#0}
11: 0x7f17d2a4971d - std::panicking::rust_panic_with_hook::h47eb8ecd1bd91d17
at /rustc/e8dc8bca2118ec1ed5970790614f0b81e9167f10/library/std/src/panicking.rs:702:17
12: 0x7f17d6229151 - std[2e6ea336b53db173]::panicking::begin_panic::<rustc_errors[f4cb041045aad9b5]::ExplicitBug>::{closure#0}
13: 0x7f17d6228956 - std[2e6ea336b53db173]::sys_common::backtrace::__rust_end_short_backtrace::<std[2e6ea336b53db173]::panicking::begin_panic<rustc_errors[f4cb041045aad9b5]::ExplicitBug>::{closure#0}, !>
14: 0x7f17d6209616 - std[2e6ea336b53db173]::panicking::begin_panic::<rustc_errors[f4cb041045aad9b5]::ExplicitBug>
15: 0x7f17d624df36 - std[2e6ea336b53db173]::panic::panic_any::<rustc_errors[f4cb041045aad9b5]::ExplicitBug>
16: 0x7f17d624dd8d - <rustc_errors[f4cb041045aad9b5]::HandlerInner>::bug::<&alloc[a4b47a688312783c]::string::String>
17: 0x7f17d624dae0 - <rustc_errors[f4cb041045aad9b5]::Handler>::bug::<&alloc[a4b47a688312783c]::string::String>
18: 0x7f17d62761ad - rustc_middle[9190505212f11309]::ty::context::tls::with_context_opt::<rustc_middle[9190505212f11309]::ty::context::tls::with_opt<rustc_middle[9190505212f11309]::util::bug::opt_span_bug_fmt<rustc_span[812c5506f6a7d0a0]::span_encoding::Span>::{closure#0}, ()>::{closure#0}, ()>
19: 0x7f17d6278016 - rustc_middle[9190505212f11309]::util::bug::opt_span_bug_fmt::<rustc_span[812c5506f6a7d0a0]::span_encoding::Span>
20: 0x7f17d3c24e03 - rustc_middle[9190505212f11309]::util::bug::bug_fmt
21: 0x7f17d3c7059e - rustc_middle[9190505212f11309]::ty::relate::super_relate_tys::<rustc_infer[81b9f5767b02f5f7]::infer::combine::Generalizer>
22: 0x7f17d3c72a8d - <rustc_infer[81b9f5767b02f5f7]::infer::combine::Generalizer as rustc_middle[9190505212f11309]::ty::relate::TypeRelation>::tys
23: 0x7f17d3c6ca65 - rustc_middle[9190505212f11309]::ty::relate::super_relate_tys::<rustc_infer[81b9f5767b02f5f7]::infer::combine::Generalizer>
24: 0x7f17d3c72a8d - <rustc_infer[81b9f5767b02f5f7]::infer::combine::Generalizer as rustc_middle[9190505212f11309]::ty::relate::TypeRelation>::tys
25: 0x7f17d3c6cc59 - rustc_middle[9190505212f11309]::ty::relate::super_relate_tys::<rustc_infer[81b9f5767b02f5f7]::infer::combine::Generalizer>
26: 0x7f17d3c72a8d - <rustc_infer[81b9f5767b02f5f7]::infer::combine::Generalizer as rustc_middle[9190505212f11309]::ty::relate::TypeRelation>::tys
27: 0x7f17d43e1ad8 - <core[9ef3251603221d4a]::result::Result<rustc_middle[9190505212f11309]::ty::subst::GenericArg, rustc_middle[9190505212f11309]::ty::error::TypeError> as rustc_type_ir[680b48bf35fe5177]::InternIteratorElement<rustc_middle[9190505212f11309]::ty::subst::GenericArg, &rustc_middle[9190505212f11309]::ty::list::List<rustc_middle[9190505212f11309]::ty::subst::GenericArg>>>::intern_with::<core[9ef3251603221d4a]::iter::adapters::map::Map<core[9ef3251603221d4a]::iter::adapters::zip::Zip<core[9ef3251603221d4a]::iter::adapters::copied::Copied<core[9ef3251603221d4a]::slice::iter::Iter<rustc_middle[9190505212f11309]::ty::subst::GenericArg>>, core[9ef3251603221d4a]::iter::adapters::copied::Copied<core[9ef3251603221d4a]::slice::iter::Iter<rustc_middle[9190505212f11309]::ty::subst::GenericArg>>>, rustc_middle[9190505212f11309]::ty::relate::relate_substs<rustc_infer[81b9f5767b02f5f7]::infer::combine::Generalizer>::{closure#0}>, <rustc_middle[9190505212f11309]::ty::context::TyCtxt>::mk_substs<core[9ef3251603221d4a]::iter::adapters::map::Map<core[9ef3251603221d4a]::iter::adapters::zip::Zip<core[9ef3251603221d4a]::iter::adapters::copied::Copied<core[9ef3251603221d4a]::slice::iter::Iter<rustc_middle[9190505212f11309]::ty::subst::GenericArg>>, core[9ef3251603221d4a]::iter::adapters::copied::Copied<core[9ef3251603221d4a]::slice::iter::Iter<rustc_middle[9190505212f11309]::ty::subst::GenericArg>>>, rustc_middle[9190505212f11309]::ty::relate::relate_substs<rustc_infer[81b9f5767b02f5f7]::infer::combine::Generalizer>::{closure#0}>>::{closure#0}>
28: 0x7f17d43e1772 - <&rustc_middle[9190505212f11309]::ty::list::List<rustc_middle[9190505212f11309]::ty::subst::GenericArg> as rustc_middle[9190505212f11309]::ty::relate::Relate>::relate::<rustc_infer[81b9f5767b02f5f7]::infer::combine::Generalizer>
29: 0x7f17d43e1645 - <rustc_middle[9190505212f11309]::ty::sty::ExistentialProjection as rustc_middle[9190505212f11309]::ty::relate::Relate>::relate::<rustc_infer[81b9f5767b02f5f7]::infer::combine::Generalizer>
30: 0x7f17d45ea115 - <rustc_infer[81b9f5767b02f5f7]::infer::combine::Generalizer as rustc_middle[9190505212f11309]::ty::relate::TypeRelation>::binders::<rustc_middle[9190505212f11309]::ty::sty::ExistentialProjection>
31: 0x7f17d45e7821 - <&mut <&rustc_middle[9190505212f11309]::ty::list::List<rustc_middle[9190505212f11309]::ty::sty::Binder<rustc_middle[9190505212f11309]::ty::sty::ExistentialPredicate>> as rustc_middle[9190505212f11309]::ty::relate::Relate>::relate<rustc_infer[81b9f5767b02f5f7]::infer::combine::Generalizer>::{closure#2} as core[9ef3251603221d4a]::ops::function::FnOnce<((rustc_middle[9190505212f11309]::ty::sty::Binder<rustc_middle[9190505212f11309]::ty::sty::ExistentialPredicate>, rustc_middle[9190505212f11309]::ty::sty::Binder<rustc_middle[9190505212f11309]::ty::sty::ExistentialPredicate>),)>>::call_once
32: 0x7f17d45e6459 - <core[9ef3251603221d4a]::result::Result<rustc_middle[9190505212f11309]::ty::sty::Binder<rustc_middle[9190505212f11309]::ty::sty::ExistentialPredicate>, rustc_middle[9190505212f11309]::ty::error::TypeError> as rustc_type_ir[680b48bf35fe5177]::InternIteratorElement<rustc_middle[9190505212f11309]::ty::sty::Binder<rustc_middle[9190505212f11309]::ty::sty::ExistentialPredicate>, &rustc_middle[9190505212f11309]::ty::list::List<rustc_middle[9190505212f11309]::ty::sty::Binder<rustc_middle[9190505212f11309]::ty::sty::ExistentialPredicate>>>>::intern_with::<core[9ef3251603221d4a]::iter::adapters::map::Map<core[9ef3251603221d4a]::iter::adapters::zip::Zip<alloc[a4b47a688312783c]::vec::into_iter::IntoIter<rustc_middle[9190505212f11309]::ty::sty::Binder<rustc_middle[9190505212f11309]::ty::sty::ExistentialPredicate>>, alloc[a4b47a688312783c]::vec::into_iter::IntoIter<rustc_middle[9190505212f11309]::ty::sty::Binder<rustc_middle[9190505212f11309]::ty::sty::ExistentialPredicate>>>, <&rustc_middle[9190505212f11309]::ty::list::List<rustc_middle[9190505212f11309]::ty::sty::Binder<rustc_middle[9190505212f11309]::ty::sty::ExistentialPredicate>> as rustc_middle[9190505212f11309]::ty::relate::Relate>::relate<rustc_infer[81b9f5767b02f5f7]::infer::combine::Generalizer>::{closure#2}>, <rustc_middle[9190505212f11309]::ty::context::TyCtxt>::mk_poly_existential_predicates<core[9ef3251603221d4a]::iter::adapters::map::Map<core[9ef3251603221d4a]::iter::adapters::zip::Zip<alloc[a4b47a688312783c]::vec::into_iter::IntoIter<rustc_middle[9190505212f11309]::ty::sty::Binder<rustc_middle[9190505212f11309]::ty::sty::ExistentialPredicate>>, alloc[a4b47a688312783c]::vec::into_iter::IntoIter<rustc_middle[9190505212f11309]::ty::sty::Binder<rustc_middle[9190505212f11309]::ty::sty::ExistentialPredicate>>>, <&rustc_middle[9190505212f11309]::ty::list::List<rustc_middle[9190505212f11309]::ty::sty::Binder<rustc_middle[9190505212f11309]::ty::sty::ExistentialPredicate>> as rustc_middle[9190505212f11309]::ty::relate::Relate>::relate<rustc_infer[81b9f5767b02f5f7]::infer::combine::Generalizer>::{closure#2}>>::{closure#0}>
33: 0x7f17d4366178 - <&rustc_middle[9190505212f11309]::ty::list::List<rustc_middle[9190505212f11309]::ty::sty::Binder<rustc_middle[9190505212f11309]::ty::sty::ExistentialPredicate>> as rustc_middle[9190505212f11309]::ty::relate::Relate>::relate::<rustc_infer[81b9f5767b02f5f7]::infer::combine::Generalizer>
34: 0x7f17d3c6e1fc - rustc_middle[9190505212f11309]::ty::relate::super_relate_tys::<rustc_infer[81b9f5767b02f5f7]::infer::combine::Generalizer>
35: 0x7f17d3c72a8d - <rustc_infer[81b9f5767b02f5f7]::infer::combine::Generalizer as rustc_middle[9190505212f11309]::ty::relate::TypeRelation>::tys
36: 0x7f17d3c6ca65 - rustc_middle[9190505212f11309]::ty::relate::super_relate_tys::<rustc_infer[81b9f5767b02f5f7]::infer::combine::Generalizer>
37: 0x7f17d3c72a8d - <rustc_infer[81b9f5767b02f5f7]::infer::combine::Generalizer as rustc_middle[9190505212f11309]::ty::relate::TypeRelation>::tys
38: 0x7f17d3beb829 - <rustc_infer[81b9f5767b02f5f7]::infer::equate::Equate as rustc_middle[9190505212f11309]::ty::relate::TypeRelation>::tys
39: 0x7f17d3f8952e - <rustc_typeck[937edb05eaf6069e]::check::fn_ctxt::FnCtxt>::check_pat
40: 0x7f17d3f85cbc - rustc_typeck[937edb05eaf6069e]::check::check::check_fn
41: 0x7f17d3f78c2e - <rustc_infer[81b9f5767b02f5f7]::infer::InferCtxtBuilder>::enter::<&rustc_middle[9190505212f11309]::ty::context::TypeckResults, <rustc_typeck[937edb05eaf6069e]::check::inherited::InheritedBuilder>::enter<rustc_typeck[937edb05eaf6069e]::check::typeck_with_fallback<rustc_typeck[937edb05eaf6069e]::check::typeck::{closure#0}>::{closure#1}, &rustc_middle[9190505212f11309]::ty::context::TypeckResults>::{closure#0}>
42: 0x7f17d3f76674 - rustc_typeck[937edb05eaf6069e]::check::typeck
43: 0x7f17d48a1f3f - rustc_query_system[88e27f7cc16d83bb]::query::plumbing::try_execute_query::<rustc_query_impl[b52b8bfa962b42d5]::plumbing::QueryCtxt, rustc_query_system[88e27f7cc16d83bb]::query::caches::DefaultCache<rustc_span[812c5506f6a7d0a0]::def_id::LocalDefId, &rustc_middle[9190505212f11309]::ty::context::TypeckResults>>
44: 0x7f17d5186dd8 - <rustc_query_impl[b52b8bfa962b42d5]::Queries as rustc_middle[9190505212f11309]::ty::query::QueryEngine>::typeck
45: 0x7f17d5291593 - <rustc_save_analysis[3877f789714e4297]::dump_visitor::DumpVisitor as rustc_hir[9122b05cfb5f69c7]::intravisit::Visitor>::visit_item
46: 0x7f17d52896a6 - <rustc_save_analysis[3877f789714e4297]::dump_visitor::DumpVisitor as rustc_hir[9122b05cfb5f69c7]::intravisit::Visitor>::visit_nested_item
47: 0x7f17d52b33f7 - rustc_hir[9122b05cfb5f69c7]::intravisit::walk_mod::<rustc_save_analysis[3877f789714e4297]::dump_visitor::DumpVisitor>
48: 0x7f17d528d8ef - <rustc_save_analysis[3877f789714e4297]::dump_visitor::DumpVisitor>::process_crate
49: 0x7f17d5264628 - <rustc_middle[9190505212f11309]::dep_graph::dep_node::DepKind as rustc_query_system[88e27f7cc16d83bb]::dep_graph::DepKind>::with_deps::<rustc_save_analysis[3877f789714e4297]::process_crate<rustc_save_analysis[3877f789714e4297]::DumpHandler>::{closure#0}, ()>
50: 0x7f17d4ab5dbb - <rustc_interface[6f1edf494a475c31]::passes::QueryContext>::enter::<rustc_driver[a5410d64bf022668]::run_compiler::{closure#1}::{closure#2}::{closure#3}, core[9ef3251603221d4a]::result::Result<(), rustc_errors[f4cb041045aad9b5]::ErrorGuaranteed>>
51: 0x7f17d4aaff0e - <rustc_interface[6f1edf494a475c31]::interface::Compiler>::enter::<rustc_driver[a5410d64bf022668]::run_compiler::{closure#1}::{closure#2}, core[9ef3251603221d4a]::result::Result<core[9ef3251603221d4a]::option::Option<rustc_interface[6f1edf494a475c31]::queries::Linker>, rustc_errors[f4cb041045aad9b5]::ErrorGuaranteed>>
52: 0x7f17d4aab9fc - rustc_span[812c5506f6a7d0a0]::with_source_map::<core[9ef3251603221d4a]::result::Result<(), rustc_errors[f4cb041045aad9b5]::ErrorGuaranteed>, rustc_interface[6f1edf494a475c31]::interface::create_compiler_and_run<core[9ef3251603221d4a]::result::Result<(), rustc_errors[f4cb041045aad9b5]::ErrorGuaranteed>, rustc_driver[a5410d64bf022668]::run_compiler::{closure#1}>::{closure#1}>
53: 0x7f17d4aab3e2 - rustc_interface[6f1edf494a475c31]::interface::create_compiler_and_run::<core[9ef3251603221d4a]::result::Result<(), rustc_errors[f4cb041045aad9b5]::ErrorGuaranteed>, rustc_driver[a5410d64bf022668]::run_compiler::{closure#1}>
54: 0x7f17d4aa9f81 - <scoped_tls[beaf390a5842bbf2]::ScopedKey<rustc_span[812c5506f6a7d0a0]::SessionGlobals>>::set::<rustc_interface[6f1edf494a475c31]::interface::run_compiler<core[9ef3251603221d4a]::result::Result<(), rustc_errors[f4cb041045aad9b5]::ErrorGuaranteed>, rustc_driver[a5410d64bf022668]::run_compiler::{closure#1}>::{closure#0}, core[9ef3251603221d4a]::result::Result<(), rustc_errors[f4cb041045aad9b5]::ErrorGuaranteed>>
55: 0x7f17d4aa9c6f - std[2e6ea336b53db173]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[6f1edf494a475c31]::util::run_in_thread_pool_with_globals<rustc_interface[6f1edf494a475c31]::interface::run_compiler<core[9ef3251603221d4a]::result::Result<(), rustc_errors[f4cb041045aad9b5]::ErrorGuaranteed>, rustc_driver[a5410d64bf022668]::run_compiler::{closure#1}>::{closure#0}, core[9ef3251603221d4a]::result::Result<(), rustc_errors[f4cb041045aad9b5]::ErrorGuaranteed>>::{closure#0}, core[9ef3251603221d4a]::result::Result<(), rustc_errors[f4cb041045aad9b5]::ErrorGuaranteed>>
56: 0x7f17d50af689 - <<std[2e6ea336b53db173]::thread::Builder>::spawn_unchecked_<rustc_interface[6f1edf494a475c31]::util::run_in_thread_pool_with_globals<rustc_interface[6f1edf494a475c31]::interface::run_compiler<core[9ef3251603221d4a]::result::Result<(), rustc_errors[f4cb041045aad9b5]::ErrorGuaranteed>, rustc_driver[a5410d64bf022668]::run_compiler::{closure#1}>::{closure#0}, core[9ef3251603221d4a]::result::Result<(), rustc_errors[f4cb041045aad9b5]::ErrorGuaranteed>>::{closure#0}, core[9ef3251603221d4a]::result::Result<(), rustc_errors[f4cb041045aad9b5]::ErrorGuaranteed>>::{closure#1} as core[9ef3251603221d4a]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
57: 0x7f17d2a53513 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::ha625c10cb002aafd
at /rustc/e8dc8bca2118ec1ed5970790614f0b81e9167f10/library/alloc/src/boxed.rs:1935:9
58: 0x7f17d2a53513 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::he99a54320e05f7cf
at /rustc/e8dc8bca2118ec1ed5970790614f0b81e9167f10/library/alloc/src/boxed.rs:1935:9
59: 0x7f17d2a53513 - std::sys::unix::thread::Thread::new::thread_start::he2b2cf9ce0aef6b5
at /rustc/e8dc8bca2118ec1ed5970790614f0b81e9167f10/library/std/src/sys/unix/thread.rs:108:17
60: 0x7f17d27b378d - <unknown>
61: 0x7f17d28348e4 - clone
62: 0x0 - <unknown>
note: the compiler unexpectedly panicked. this is a bug.
note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md
note: rustc 1.65.0-nightly (e8dc8bca2 2022-08-13) running on x86_64-unknown-linux-gnu
note: compiler flags: -Z save-analysis
query stack during panic:
#0 [typeck] type-checking `f`
end of query stack
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0038`.