Closed
Description
Code
#![feature(min_specialization)]
struct S;
impl From<S> for S {
fn from(s: S) -> S {
s
}
}Meta
rustc --version --verbose:
rustc 1.71.0-nightly (473f916d8 2023-05-03)
binary: rustc
commit-hash: 473f916d836cc662c5bdbb0d40af9fb4678fab9e
commit-date: 2023-05-03
host: x86_64-unknown-linux-gnu
release: 1.71.0-nightly
LLVM version: 16.0.2
Error output
<output>
Backtrace
error[E0601]: `main` function not found in crate `treereduce`
--> treereduce.out:12:10
|
12 | struct X;
| ^ consider adding a `main` function to `treereduce.out`
thread 'rustc' panicked at 'called `Result::unwrap()` on an `Err` value: failed while formatting fluent string `hir_analysis_impl_not_marked_default_err`:
the attribute `label` was missing
help: add `.label = <message>`
', compiler/rustc_errors/src/emitter.rs:2399:77
stack backtrace:
0: 0x7fb99b969441 - std::backtrace_rs::backtrace::libunwind::trace::h7d7e89c126af8621
at /rustc/473f916d836cc662c5bdbb0d40af9fb4678fab9e/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
1: 0x7fb99b969441 - std::backtrace_rs::backtrace::trace_unsynchronized::h963fae9bbbf23fd2
at /rustc/473f916d836cc662c5bdbb0d40af9fb4678fab9e/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
2: 0x7fb99b969441 - std::sys_common::backtrace::_print_fmt::hcab6046e71683b2b
at /rustc/473f916d836cc662c5bdbb0d40af9fb4678fab9e/library/std/src/sys_common/backtrace.rs:65:5
3: 0x7fb99b969441 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h7fe42f78f0b27bad
at /rustc/473f916d836cc662c5bdbb0d40af9fb4678fab9e/library/std/src/sys_common/backtrace.rs:44:22
4: 0x7fb99b9ca0df - core::fmt::rt::Argument::fmt::h1d5ff34ff75b4775
at /rustc/473f916d836cc662c5bdbb0d40af9fb4678fab9e/library/core/src/fmt/rt.rs:138:9
5: 0x7fb99b9ca0df - core::fmt::write::h17acb3a0f4c83039
at /rustc/473f916d836cc662c5bdbb0d40af9fb4678fab9e/library/core/src/fmt/mod.rs:1094:21
6: 0x7fb99b95c4f1 - std::io::Write::write_fmt::h76edf76528efc321
at /rustc/473f916d836cc662c5bdbb0d40af9fb4678fab9e/library/std/src/io/mod.rs:1712:15
7: 0x7fb99b969255 - std::sys_common::backtrace::_print::hab70b5d2f9c30731
at /rustc/473f916d836cc662c5bdbb0d40af9fb4678fab9e/library/std/src/sys_common/backtrace.rs:47:5
8: 0x7fb99b969255 - std::sys_common::backtrace::print::hc349f5f36c658efa
at /rustc/473f916d836cc662c5bdbb0d40af9fb4678fab9e/library/std/src/sys_common/backtrace.rs:34:9
9: 0x7fb99b96bee7 - std::panicking::default_hook::{{closure}}::h71577b1775ba103e
10: 0x7fb99b96bcd4 - std::panicking::default_hook::h677a2421ac99312e
at /rustc/473f916d836cc662c5bdbb0d40af9fb4678fab9e/library/std/src/panicking.rs:288:9
11: 0x7fb99eb735b5 - rustc_driver_impl[b62a44a0491bb616]::DEFAULT_HOOK::{closure#0}::{closure#0}
12: 0x7fb99b96c607 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hbafb897408759b94
at /rustc/473f916d836cc662c5bdbb0d40af9fb4678fab9e/library/alloc/src/boxed.rs:1999:9
13: 0x7fb99b96c607 - std::panicking::rust_panic_with_hook::h15051d74d5177646
at /rustc/473f916d836cc662c5bdbb0d40af9fb4678fab9e/library/std/src/panicking.rs:695:13
14: 0x7fb99b96c387 - std::panicking::begin_panic_handler::{{closure}}::hd5e0f78328757c78
at /rustc/473f916d836cc662c5bdbb0d40af9fb4678fab9e/library/std/src/panicking.rs:582:13
15: 0x7fb99b969886 - std::sys_common::backtrace::__rust_end_short_backtrace::h5936cd6107015796
at /rustc/473f916d836cc662c5bdbb0d40af9fb4678fab9e/library/std/src/sys_common/backtrace.rs:150:18
16: 0x7fb99b96c0f2 - rust_begin_unwind
at /rustc/473f916d836cc662c5bdbb0d40af9fb4678fab9e/library/std/src/panicking.rs:578:5
17: 0x7fb99b9c6383 - core::panicking::panic_fmt::h550d9c07c7423061
at /rustc/473f916d836cc662c5bdbb0d40af9fb4678fab9e/library/core/src/panicking.rs:67:14
18: 0x7fb99b9c69a3 - core::result::unwrap_failed::hf71c0194b80e80c9
at /rustc/473f916d836cc662c5bdbb0d40af9fb4678fab9e/library/core/src/result.rs:1651:5
19: 0x7fb99e15d96a - <rustc_errors[7cb7e4203cccff6e]::emitter::FileWithAnnotatedLines>::collect_annotations
20: 0x7fb99e150516 - <rustc_errors[7cb7e4203cccff6e]::emitter::EmitterWriter>::emit_message_default::{closure#0}
21: 0x7fb99e149bea - <rustc_errors[7cb7e4203cccff6e]::emitter::EmitterWriter>::emit_messages_default
22: 0x7fb99e141f1a - <rustc_errors[7cb7e4203cccff6e]::emitter::EmitterWriter as rustc_errors[7cb7e4203cccff6e]::emitter::Emitter>::emit_diagnostic
23: 0x7fb99e2e4159 - <rustc_errors[7cb7e4203cccff6e]::HandlerInner>::emit_diagnostic::{closure#2}
24: 0x7fb99e2ff852 - rustc_interface[21cec1d94dbb6fac]::callbacks::track_diagnostic
25: 0x7fb99dd294d0 - <rustc_errors[7cb7e4203cccff6e]::HandlerInner>::emit_diagnostic
26: 0x7fb99d82e64e - <rustc_errors[7cb7e4203cccff6e]::Handler>::emit_diagnostic
27: 0x7fb99dd01d8a - <rustc_span[3a4c48cd7d4d1b0]::ErrorGuaranteed as rustc_errors[7cb7e4203cccff6e]::diagnostic_builder::EmissionGuarantee>::diagnostic_builder_emit_producing_guarantee
28: 0x7fb99ec81a4d - <rustc_session[65349724d34b65f7]::parse::ParseSess>::emit_err::<rustc_hir_analysis[5e95606301d545]::errors::ImplNotMarkedDefault>
29: 0x7fb99ec627d6 - rustc_hir_analysis[5e95606301d545]::check::report_forbidden_specialization
30: 0x7fb99dbc2351 - rustc_hir_analysis[5e95606301d545]::check::check::check_mod_item_types
31: 0x7fb99e1def51 - rustc_query_system[fe91d5e47043fef5]::query::plumbing::try_execute_query::<rustc_query_impl[b5d85a12cb021c58]::queries::check_mod_item_types, rustc_query_impl[b5d85a12cb021c58]::plumbing::QueryCtxt>
32: 0x7fb99e1deb91 - rustc_query_impl[b5d85a12cb021c58]::get_query::check_mod_item_types
33: 0x7fb99dff26b4 - <rustc_middle[d43bf05128c56115]::hir::map::Map>::for_each_module::<rustc_hir_analysis[5e95606301d545]::check_crate::{closure#6}::{closure#0}>
34: 0x7fb99dfef24b - rustc_hir_analysis[5e95606301d545]::check_crate
35: 0x7fb99dfe1f45 - rustc_interface[21cec1d94dbb6fac]::passes::analysis
36: 0x7fb99e2f9067 - rustc_query_system[fe91d5e47043fef5]::query::plumbing::try_execute_query::<rustc_query_impl[b5d85a12cb021c58]::queries::analysis, rustc_query_impl[b5d85a12cb021c58]::plumbing::QueryCtxt>
37: 0x7fb99e2f8d83 - rustc_query_impl[b5d85a12cb021c58]::get_query::analysis
38: 0x7fb99de0996f - <rustc_middle[d43bf05128c56115]::ty::context::GlobalCtxt>::enter::<rustc_driver_impl[b62a44a0491bb616]::run_compiler::{closure#1}::{closure#2}::{closure#4}, core[aaef91ac196fa841]::result::Result<(), rustc_span[3a4c48cd7d4d1b0]::ErrorGuaranteed>>
39: 0x7fb99de08b5f - <rustc_interface[21cec1d94dbb6fac]::interface::Compiler>::enter::<rustc_driver_impl[b62a44a0491bb616]::run_compiler::{closure#1}::{closure#2}, core[aaef91ac196fa841]::result::Result<core[aaef91ac196fa841]::option::Option<rustc_interface[21cec1d94dbb6fac]::queries::Linker>, rustc_span[3a4c48cd7d4d1b0]::ErrorGuaranteed>>
40: 0x7fb99de062ff - std[f676bdae5d002d88]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[21cec1d94dbb6fac]::util::run_in_thread_pool_with_globals<rustc_interface[21cec1d94dbb6fac]::interface::run_compiler<core[aaef91ac196fa841]::result::Result<(), rustc_span[3a4c48cd7d4d1b0]::ErrorGuaranteed>, rustc_driver_impl[b62a44a0491bb616]::run_compiler::{closure#1}>::{closure#0}, core[aaef91ac196fa841]::result::Result<(), rustc_span[3a4c48cd7d4d1b0]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[aaef91ac196fa841]::result::Result<(), rustc_span[3a4c48cd7d4d1b0]::ErrorGuaranteed>>
41: 0x7fb99e45ba3e - <<std[f676bdae5d002d88]::thread::Builder>::spawn_unchecked_<rustc_interface[21cec1d94dbb6fac]::util::run_in_thread_pool_with_globals<rustc_interface[21cec1d94dbb6fac]::interface::run_compiler<core[aaef91ac196fa841]::result::Result<(), rustc_span[3a4c48cd7d4d1b0]::ErrorGuaranteed>, rustc_driver_impl[b62a44a0491bb616]::run_compiler::{closure#1}>::{closure#0}, core[aaef91ac196fa841]::result::Result<(), rustc_span[3a4c48cd7d4d1b0]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[aaef91ac196fa841]::result::Result<(), rustc_span[3a4c48cd7d4d1b0]::ErrorGuaranteed>>::{closure#1} as core[aaef91ac196fa841]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
42: 0x7fb99b976ad5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h9ce144e1e2d38d77
at /rustc/473f916d836cc662c5bdbb0d40af9fb4678fab9e/library/alloc/src/boxed.rs:1985:9
43: 0x7fb99b976ad5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h4ba76054665f9e1c
at /rustc/473f916d836cc662c5bdbb0d40af9fb4678fab9e/library/alloc/src/boxed.rs:1985:9
44: 0x7fb99b976ad5 - std::sys::unix::thread::Thread::new::thread_start::h27b9b576da10a848
at /rustc/473f916d836cc662c5bdbb0d40af9fb4678fab9e/library/std/src/sys/unix/thread.rs:108:17
45: 0x7fb99b712bb5 - <unknown>
46: 0x7fb99b794d90 - <unknown>
47: 0x0 - <unknown>
error: 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 1.71.0-nightly (473f916d8 2023-05-03) running on x86_64-unknown-linux-gnu
query stack during panic:
#0 [check_mod_item_types] checking item types in top-level module
#1 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to previous error
Some errors have detailed explanations: E0520, E0601.
For more information about an error, try `rustc --explain E0520`.