Closed
Description
Code
also playground link: https://play.rust-lang.org/?version=nightly&mode=debug&edition=2021&gist=605d6253e0286ecce2ac39a229a15ebd
use std::marker::PhantomData;
struct Node<T> {
phantom: PhantomData<T>,
}
fn make_node<T>(v: T) -> Node<T> {
todo!()
}
trait TypeMapper {
type MapType;
}
pub type Mapped<T> = <T as TypeMapper>::MapType;
struct TestMeta {
node: f32,
}
struct Test {
node: Node<f32>,
}
impl TypeMapper for TestMeta {
type MapType = Test;
}
fn test() -> Mapped<TestMeta> {
let node = Ok(make_node(1.))
.or_else(|_| Ok(make_node(1.)))
.unwrap_or_else(|_| make_node(0.3));
Mapped::<TestMeta> { node }
}Meta
rustc --version --verbose:
rustc 1.65.0-nightly (878aef79d 2022-08-20)
binary: rustc
commit-hash: 878aef79dcdf59d19bb8482202dc55e58ceb62ff
commit-date: 2022-08-20
host: x86_64-pc-windows-msvc
release: 1.65.0-nightly
LLVM version: 15.0.0
I also checked on latest nightly
Error output
error: internal compiler error: unexpected panic
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 1.66.0-nightly (6b3ede3f7 2022-10-13) running on x86_64-unknown-linux-gnu
note: compiler flags: --crate-type lib -C embed-bitcode=no -C codegen-units=1 -C debuginfo=2
note: some of the compiler flags provided by cargo are hidden
query stack during panic:
#0 [typeck] type-checking `test`
#1 [typeck_item_bodies] type-checking all item bodies
#2 [analysis] running analysis passes on this crate
end of query stack
Backtrace
thread 'rustc' panicked at 'range end index 1 out of range for slice of length 0', compiler/rustc_middle/src/ty/generics.rs:293:20
stack backtrace:
0: 0x7fab34504510 - std::backtrace_rs::backtrace::libunwind::trace::h5fd4ba8cd3f3b043
at /rustc/6b3ede3f7bc502eba7bbd202b4b9312d812adcd7/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
1: 0x7fab34504510 - std::backtrace_rs::backtrace::trace_unsynchronized::h6b8ff17e84b06344
at /rustc/6b3ede3f7bc502eba7bbd202b4b9312d812adcd7/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
2: 0x7fab34504510 - std::sys_common::backtrace::_print_fmt::h2a62246ce4798f58
at /rustc/6b3ede3f7bc502eba7bbd202b4b9312d812adcd7/library/std/src/sys_common/backtrace.rs:66:5
3: 0x7fab34504510 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hf764488cdbda71ea
at /rustc/6b3ede3f7bc502eba7bbd202b4b9312d812adcd7/library/std/src/sys_common/backtrace.rs:45:22
4: 0x7fab3456052e - core::fmt::write::h449e808f9f40276b
at /rustc/6b3ede3f7bc502eba7bbd202b4b9312d812adcd7/library/core/src/fmt/mod.rs:1209:17
5: 0x7fab344f48d5 - std::io::Write::write_fmt::hd7b0087c2e6dbebc
at /rustc/6b3ede3f7bc502eba7bbd202b4b9312d812adcd7/library/std/src/io/mod.rs:1680:15
6: 0x7fab34507143 - std::sys_common::backtrace::_print::hf7b092f93b76d882
at /rustc/6b3ede3f7bc502eba7bbd202b4b9312d812adcd7/library/std/src/sys_common/backtrace.rs:48:5
7: 0x7fab34507143 - std::sys_common::backtrace::print::hdf0c27a1f1e747c6
at /rustc/6b3ede3f7bc502eba7bbd202b4b9312d812adcd7/library/std/src/sys_common/backtrace.rs:35:9
8: 0x7fab34507143 - std::panicking::default_hook::{{closure}}::h5891167ca195e6a8
at /rustc/6b3ede3f7bc502eba7bbd202b4b9312d812adcd7/library/std/src/panicking.rs:267:22
9: 0x7fab34506e1a - std::panicking::default_hook::he044f2ad9b0871df
at /rustc/6b3ede3f7bc502eba7bbd202b4b9312d812adcd7/library/std/src/panicking.rs:286:9
10: 0x7fab36e3f6c4 - <rustc_driver[96a78d505a155f82]::DEFAULT_HOOK::{closure#0}::{closure#0} as core[4789b31b67b14f2c]::ops::function::FnOnce<(&core[4789b31b67b14f2c]::panic::panic_info::PanicInfo,)>>::call_once::{shim:vtable#0}
11: 0x7fab34507a79 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h0266072becdeb9d9
at /rustc/6b3ede3f7bc502eba7bbd202b4b9312d812adcd7/library/alloc/src/boxed.rs:1952:9
12: 0x7fab34507a79 - std::panicking::rust_panic_with_hook::h4c36a8e39d3b1546
at /rustc/6b3ede3f7bc502eba7bbd202b4b9312d812adcd7/library/std/src/panicking.rs:692:13
13: 0x7fab345077f7 - std::panicking::begin_panic_handler::{{closure}}::h1ad7cae6847bde08
at /rustc/6b3ede3f7bc502eba7bbd202b4b9312d812adcd7/library/std/src/panicking.rs:579:13
14: 0x7fab345049bc - std::sys_common::backtrace::__rust_end_short_backtrace::h6c67c761e3d1141c
at /rustc/6b3ede3f7bc502eba7bbd202b4b9312d812adcd7/library/std/src/sys_common/backtrace.rs:138:18
15: 0x7fab34507512 - rust_begin_unwind
at /rustc/6b3ede3f7bc502eba7bbd202b4b9312d812adcd7/library/std/src/panicking.rs:575:5
16: 0x7fab3455cf13 - core::panicking::panic_fmt::h552ae8977ad87247
at /rustc/6b3ede3f7bc502eba7bbd202b4b9312d812adcd7/library/core/src/panicking.rs:65:14
17: 0x7fab345637d2 - core::slice::index::slice_end_index_len_fail_rt::h1c2cc5023b211b61
at /rustc/6b3ede3f7bc502eba7bbd202b4b9312d812adcd7/library/core/src/slice/index.rs:76:5
18: 0x7fab34563757 - core::slice::index::slice_end_index_len_fail::h23deb4de6ddc0f1e
at /rustc/6b3ede3f7bc502eba7bbd202b4b9312d812adcd7/library/core/src/slice/index.rs:69:9
19: 0x7fab37e35a94 - <rustc_middle[6dbd2462fc060d2b]::ty::generics::Generics>::own_substs
20: 0x7fab37d7c6df - <rustc_infer[f8ef610796372df6]::infer::error_reporting::need_type_info::FindInferSourceVisitor as rustc_hir[1f1fbd514ec97001]::intravisit::Visitor>::visit_expr
21: 0x7fab37d7c53b - <rustc_infer[f8ef610796372df6]::infer::error_reporting::need_type_info::FindInferSourceVisitor as rustc_hir[1f1fbd514ec97001]::intravisit::Visitor>::visit_expr
22: 0x7fab37dbcb34 - <rustc_infer[f8ef610796372df6]::infer::error_reporting::TypeErrCtxt>::emit_inference_failure_err
23: 0x7fab37cf88d2 - <rustc_infer[f8ef610796372df6]::infer::error_reporting::TypeErrCtxt as rustc_trait_selection[d25599a44813fce7]::traits::error_reporting::InferCtxtPrivExt>::maybe_report_ambiguity
24: 0x7fab37cebdf2 - <rustc_infer[f8ef610796372df6]::infer::error_reporting::TypeErrCtxt as rustc_trait_selection[d25599a44813fce7]::traits::error_reporting::TypeErrCtxtExt>::report_fulfillment_errors
25: 0x7fab36312af5 - <rustc_hir_analysis[664218718b8589c1]::check::inherited::InheritedBuilder>::enter::<rustc_hir_analysis[664218718b8589c1]::check::typeck_with_fallback<rustc_hir_analysis[664218718b8589c1]::check::typeck::{closure#0}>::{closure#1}, &rustc_middle[6dbd2462fc060d2b]::ty::context::TypeckResults>
26: 0x7fab3630f27c - rustc_hir_analysis[664218718b8589c1]::check::typeck
27: 0x7fab3644e005 - rustc_query_system[e331cc205febeb47]::query::plumbing::try_execute_query::<rustc_query_impl[bde3f7ee5c39de55]::plumbing::QueryCtxt, rustc_query_system[e331cc205febeb47]::query::caches::DefaultCache<rustc_span[3592ef59ed235133]::def_id::LocalDefId, &rustc_middle[6dbd2462fc060d2b]::ty::context::TypeckResults>>
28: 0x7fab36d4450e - <rustc_query_impl[bde3f7ee5c39de55]::Queries as rustc_middle[6dbd2462fc060d2b]::ty::query::QueryEngine>::typeck
29: 0x7fab36b7a057 - rustc_data_structures[8d749e1e363ae678]::sync::par_for_each_in::<&[rustc_span[3592ef59ed235133]::def_id::LocalDefId], <rustc_middle[6dbd2462fc060d2b]::hir::map::Map>::par_body_owners<rustc_hir_analysis[664218718b8589c1]::check::typeck_item_bodies::{closure#0}>::{closure#0}>
30: 0x7fab36b79e13 - rustc_hir_analysis[664218718b8589c1]::check::typeck_item_bodies
31: 0x7fab36a8ebfa - rustc_query_system[e331cc205febeb47]::query::plumbing::try_execute_query::<rustc_query_impl[bde3f7ee5c39de55]::plumbing::QueryCtxt, rustc_query_system[e331cc205febeb47]::query::caches::DefaultCache<(), ()>>
32: 0x7fab36a8e927 - rustc_query_system[e331cc205febeb47]::query::plumbing::get_query::<rustc_query_impl[bde3f7ee5c39de55]::queries::typeck_item_bodies, rustc_query_impl[bde3f7ee5c39de55]::plumbing::QueryCtxt>
33: 0x7fab3683452f - <rustc_session[68dc535c7179149b]::session::Session>::time::<(), rustc_hir_analysis[664218718b8589c1]::check_crate::{closure#7}>
34: 0x7fab368340ff - rustc_hir_analysis[664218718b8589c1]::check_crate
35: 0x7fab36833c07 - rustc_interface[523bd19883029b4c]::passes::analysis
36: 0x7fab36bd4ab4 - rustc_query_system[e331cc205febeb47]::query::plumbing::try_execute_query::<rustc_query_impl[bde3f7ee5c39de55]::plumbing::QueryCtxt, rustc_query_system[e331cc205febeb47]::query::caches::DefaultCache<(), core[4789b31b67b14f2c]::result::Result<(), rustc_errors[fd73173ee5a3bff8]::ErrorGuaranteed>>>
37: 0x7fab36bd47e7 - rustc_query_system[e331cc205febeb47]::query::plumbing::get_query::<rustc_query_impl[bde3f7ee5c39de55]::queries::analysis, rustc_query_impl[bde3f7ee5c39de55]::plumbing::QueryCtxt>
38: 0x7fab35a40d33 - <rustc_interface[523bd19883029b4c]::passes::QueryContext>::enter::<rustc_driver[96a78d505a155f82]::run_compiler::{closure#1}::{closure#2}::{closure#3}, core[4789b31b67b14f2c]::result::Result<(), rustc_errors[fd73173ee5a3bff8]::ErrorGuaranteed>>
39: 0x7fab35a39b68 - rustc_interface[523bd19883029b4c]::interface::create_compiler_and_run::<core[4789b31b67b14f2c]::result::Result<(), rustc_errors[fd73173ee5a3bff8]::ErrorGuaranteed>, rustc_driver[96a78d505a155f82]::run_compiler::{closure#1}>
40: 0x7fab35a38992 - <scoped_tls[2dd69a52c14e2135]::ScopedKey<rustc_span[3592ef59ed235133]::SessionGlobals>>::set::<rustc_interface[523bd19883029b4c]::interface::run_compiler<core[4789b31b67b14f2c]::result::Result<(), rustc_errors[fd73173ee5a3bff8]::ErrorGuaranteed>, rustc_driver[96a78d505a155f82]::run_compiler::{closure#1}>::{closure#0}, core[4789b31b67b14f2c]::result::Result<(), rustc_errors[fd73173ee5a3bff8]::ErrorGuaranteed>>
41: 0x7fab35a37e6f - std[3c0b16f342cb28c]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[523bd19883029b4c]::util::run_in_thread_pool_with_globals<rustc_interface[523bd19883029b4c]::interface::run_compiler<core[4789b31b67b14f2c]::result::Result<(), rustc_errors[fd73173ee5a3bff8]::ErrorGuaranteed>, rustc_driver[96a78d505a155f82]::run_compiler::{closure#1}>::{closure#0}, core[4789b31b67b14f2c]::result::Result<(), rustc_errors[fd73173ee5a3bff8]::ErrorGuaranteed>>::{closure#0}, core[4789b31b67b14f2c]::result::Result<(), rustc_errors[fd73173ee5a3bff8]::ErrorGuaranteed>>
42: 0x7fab36c5f87f - <<std[3c0b16f342cb28c]::thread::Builder>::spawn_unchecked_<rustc_interface[523bd19883029b4c]::util::run_in_thread_pool_with_globals<rustc_interface[523bd19883029b4c]::interface::run_compiler<core[4789b31b67b14f2c]::result::Result<(), rustc_errors[fd73173ee5a3bff8]::ErrorGuaranteed>, rustc_driver[96a78d505a155f82]::run_compiler::{closure#1}>::{closure#0}, core[4789b31b67b14f2c]::result::Result<(), rustc_errors[fd73173ee5a3bff8]::ErrorGuaranteed>>::{closure#0}, core[4789b31b67b14f2c]::result::Result<(), rustc_errors[fd73173ee5a3bff8]::ErrorGuaranteed>>::{closure#1} as core[4789b31b67b14f2c]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
43: 0x7fab34511593 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h443ce3efa86ddcda
at /rustc/6b3ede3f7bc502eba7bbd202b4b9312d812adcd7/library/alloc/src/boxed.rs:1938:9
44: 0x7fab34511593 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h530c0799f48af0fa
at /rustc/6b3ede3f7bc502eba7bbd202b4b9312d812adcd7/library/alloc/src/boxed.rs:1938:9
45: 0x7fab34511593 - std::sys::unix::thread::Thread::new::thread_start::hc1d2cc56d17cceb4
at /rustc/6b3ede3f7bc502eba7bbd202b4b9312d812adcd7/library/std/src/sys/unix/thread.rs:108:17
46: 0x7fab343e3609 - start_thread
47: 0x7fab34306133 - clone
48: 0x0 - <unknown>