Closed
Description
The following only crashes on stable, beta and nightly:
use std::marker::PhantomData;
struct B<T = N, const N: T>(PhantomData<[T; N]>);Notice the lack of #![feature(const_generics)]
Backtrace Stable:
Compiling playground v0.0.1 (/playground)
thread 'rustc' panicked at 'slice index starts at 1 but ends at 0', src/libcore/slice/mod.rs:2419:5
stack backtrace:
0: std::sys::unix::backtrace::tracing::imp::unwind_backtrace
at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:39
1: std::sys_common::backtrace::_print
at src/libstd/sys_common/backtrace.rs:70
2: std::panicking::default_hook::{{closure}}
at src/libstd/sys_common/backtrace.rs:58
at src/libstd/panicking.rs:200
3: std::panicking::default_hook
at src/libstd/panicking.rs:215
4: rustc::util::common::panic_hook
5: std::panicking::rust_panic_with_hook
at src/libstd/panicking.rs:482
6: std::panicking::continue_panic_fmt
at src/libstd/panicking.rs:385
7: rust_begin_unwind
at src/libstd/panicking.rs:312
8: core::panicking::panic_fmt
at src/libcore/panicking.rs:85
9: core::slice::slice_index_order_fail
at src/libcore/slice/mod.rs:2419
10: rustc_resolve::Resolver::resolve_ident_in_lexical_scope
11: rustc_resolve::Resolver::resolve_path
12: rustc_resolve::Resolver::resolve_path_without_parent_scope
13: rustc_resolve::Resolver::smart_resolve_path_fragment
14: rustc_resolve::Resolver::smart_resolve_path
15: <rustc_resolve::Resolver<'a> as syntax::visit::Visitor<'tcx>>::visit_ty
16: <rustc_resolve::Resolver<'a> as syntax::visit::Visitor<'tcx>>::visit_generics
17: syntax::visit::walk_item
18: rustc_resolve::Resolver::resolve_item
19: rustc_resolve::Resolver::resolve_crate
20: rustc::util::common::time
21: rustc_driver::driver::compile_input
22: rustc_driver::run_compiler_with_pool
23: <scoped_tls::ScopedKey<T>>::set
24: rustc_driver::run_compiler
25: syntax::with_globals
26: __rust_maybe_catch_panic
at src/libpanic_unwind/lib.rs:87
27: <F as alloc::boxed::FnBox<A>>::call_box
28: std::sys::unix::thread::Thread::new::thread_start
at /rustc/91856ed52c58aa5ba66a015354d1cc69e9779bdf/src/liballoc/boxed.rs:759
at src/libstd/sys_common/thread.rs:14
at src/libstd/sys/unix/thread.rs:81
29: start_thread
30: __clone
query stack during panic:
end of query stack
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/blob/master/CONTRIBUTING.md#bug-reports
note: rustc 1.34.0 (91856ed52 2019-04-10) running on x86_64-unknown-linux-gnu
note: compiler flags: -C codegen-units=1 -C debuginfo=2 --crate-type lib
note: some of the compiler flags provided by cargo are hidden
error: Could not compile `playground`.
To learn more, run the command again with --verbose.
Backtrace Beta/Nightly:
error: internal compiler error: src/librustc/ty/subst.rs:546: Type parameter `T/#0` (T/0) out of range when substituting (root type=Some(T)) substs=[]
thread 'rustc' panicked at 'Box<Any>', src/librustc_errors/lib.rs:571:9
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
stack backtrace:
0: std::sys::unix::backtrace::tracing::imp::unwind_backtrace
at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:39
1: std::sys_common::backtrace::_print
at src/libstd/sys_common/backtrace.rs:71
2: std::panicking::default_hook::{{closure}}
at src/libstd/sys_common/backtrace.rs:59
at src/libstd/panicking.rs:197
3: std::panicking::default_hook
at src/libstd/panicking.rs:211
4: rustc::util::common::panic_hook
5: std::panicking::rust_panic_with_hook
at src/libstd/panicking.rs:478
6: std::panicking::begin_panic
7: rustc_errors::Handler::span_bug
8: rustc::util::bug::opt_span_bug_fmt::{{closure}}
9: rustc::ty::context::tls::with_opt::{{closure}}
10: rustc::ty::context::tls::with_context_opt
11: rustc::ty::context::tls::with_opt
12: rustc::util::bug::opt_span_bug_fmt
13: rustc::util::bug::span_bug_fmt
14: <rustc::ty::subst::SubstFolder as rustc::ty::fold::TypeFolder>::fold_ty
15: rustc_typeck::check::FnCtxt::instantiate_value_path
16: rustc_typeck::check::FnCtxt::check_expr_kind
17: rustc_typeck::check::FnCtxt::check_expr_with_expectation_and_needs
18: rustc::ty::context::GlobalCtxt::enter_local
19: rustc_typeck::check::typeck_tables_of
20: rustc::ty::query::__query_compute::typeck_tables_of
21: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors for rustc::ty::query::queries::typeck_tables_of>::compute
22: rustc::dep_graph::graph::DepGraph::with_task_impl
23: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query
24: rustc::ty::<impl rustc::ty::context::TyCtxt>::par_body_owners
25: rustc_typeck::check::typeck_item_bodies
26: rustc::ty::query::__query_compute::typeck_item_bodies
27: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors for rustc::ty::query::queries::typeck_item_bodies>::compute
28: rustc::dep_graph::graph::DepGraph::with_task_impl
29: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query
30: rustc::util::common::time
31: rustc_typeck::check_crate
32: rustc_interface::passes::analysis
33: rustc::ty::query::__query_compute::analysis
34: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors for rustc::ty::query::queries::analysis>::compute
35: rustc::dep_graph::graph::DepGraph::with_task_impl
36: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query
37: rustc_interface::passes::BoxedGlobalCtxt::access::{{closure}}
38: rustc_interface::passes::create_global_ctxt::{{closure}}
39: rustc_interface::passes::BoxedGlobalCtxt::enter
40: rustc_interface::interface::run_compiler_in_existing_thread_pool
41: std::thread::local::LocalKey<T>::with
42: scoped_tls::ScopedKey<T>::set
43: syntax::with_globals
query stack during panic:
#0 [typeck_tables_of] processing `B::0::{{constant}}#0`
#1 [typeck_item_bodies] type-checking all item bodies
#2 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to 3 previous errors
For more information about this error, try `rustc --explain E0658`.
note: the compiler unexpectedly panicked. this is a bug.
note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports
note: rustc 1.36.0-nightly (e305df184 2019-04-24) running on x86_64-unknown-linux-gnu
note: compiler flags: -C codegen-units=1 -C debuginfo=2 --crate-type lib
note: some of the compiler flags provided by cargo are hidden
error: Could not compile `playground`.
To learn more, run the command again with --verbose.