Compiler panic while compiling async_trait and adding "pub" as function modifier

[zskamljic]

The following code fails to compile:

#[async_trait]
pub trait AsCleanJson {
    pub async fn clean_json<T: DeserializeOwned>(self) -> Result<T>;
}

However, after observing start of the stacktrace I see the following message: pub not permitted here because it's implied,
after removing it, this code compiles fine:

#[async_trait]
pub trait AsCleanJson {
    async fn clean_json<T: DeserializeOwned>(self) -> Result<T>;
}

The depencencies used:

anyhow = "1.0.68"
async-trait = "0.1.61"
reqwest = "0.11.13"
serde = { version = "1.0.152", features = ["serde_derive"] }

Here's the stacktrace:

error[E0449]: unnecessary visibility qualifier
 --> src/deserialization.rs:8:5
  |
8 |     pub async fn clean_json<T: DeserializeOwned>(self) -> Result<T>;
  |     ^^^ `pub` not permitted here because it's implied

error[E0706]: functions in traits cannot be declared `async`
 --> src/deserialization.rs:8:5
  |
8 |     pub async fn clean_json<T: DeserializeOwned>(self) -> Result<T>;
  |     ^^^^-----^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |         |
  |         `async` because of this
  |
  = note: `async` trait functions are not currently supported
  = note: consider using the `async-trait` crate: https://crates.io/crates/async-trait
  = note: see issue #91611 <https://github.com/rust-lang/rust/issues/91611> for more information

error[E0195]: lifetime parameters or bounds on method `clean_json` do not match the trait declaration
  --> src/deserialization.rs:13:24
   |
8  |     pub async fn clean_json<T: DeserializeOwned>(self) -> Result<T>;
   |                            --------------------- lifetimes in impl do not match this method in trait
...
13 |     async fn clean_json<T: DeserializeOwned>(self) -> Result<T> {
   |                        ^^^^^^^^^^^^^^^^^^^^^ lifetimes do not match method in trait

error: internal compiler error: compiler/rustc_middle/src/ty/subst.rs:726:9: type parameter `T/#1` (T/1) out of range when substituting, substs=[_]

thread 'rustc' panicked at 'Box<dyn Any>', /rustc/90743e7298aca107ddaa0c202a4d3604e29bfeb6/compiler/rustc_errors/src/lib.rs:1519:9
stack backtrace:
   0:     0x7f3f40a204d0 - std::backtrace_rs::backtrace::libunwind::trace::h1d00f3fcf4cb5ac4
                               at /rustc/90743e7298aca107ddaa0c202a4d3604e29bfeb6/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7f3f40a204d0 - std::backtrace_rs::backtrace::trace_unsynchronized::h920a6ff332484ee2
                               at /rustc/90743e7298aca107ddaa0c202a4d3604e29bfeb6/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f3f40a204d0 - std::sys_common::backtrace::_print_fmt::hd7323920c925af6d
                               at /rustc/90743e7298aca107ddaa0c202a4d3604e29bfeb6/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7f3f40a204d0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h3155a8c966b4beb5
                               at /rustc/90743e7298aca107ddaa0c202a4d3604e29bfeb6/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f3f3cbc898e - core::fmt::write::h062c617411b691df
                               at /rustc/90743e7298aca107ddaa0c202a4d3604e29bfeb6/library/core/src/fmt/mod.rs:1209:17
   5:     0x7f3f40a14285 - std::io::Write::write_fmt::hb61fdf1275c61e1c
                               at /rustc/90743e7298aca107ddaa0c202a4d3604e29bfeb6/library/std/src/io/mod.rs:1682:15
   6:     0x7f3f40a20295 - std::sys_common::backtrace::_print::hd1b4d9664ab500e0
                               at /rustc/90743e7298aca107ddaa0c202a4d3604e29bfeb6/library/std/src/sys_common/backtrace.rs:47:5
   7:     0x7f3f40a20295 - std::sys_common::backtrace::print::hca896ae22beb06cb
                               at /rustc/90743e7298aca107ddaa0c202a4d3604e29bfeb6/library/std/src/sys_common/backtrace.rs:34:9
   8:     0x7f3f40a225ef - std::panicking::default_hook::{{closure}}::h0b5eeed5cf36ab5f
                               at /rustc/90743e7298aca107ddaa0c202a4d3604e29bfeb6/library/std/src/panicking.rs:267:22
   9:     0x7f3f40a2232a - std::panicking::default_hook::h8932b573145a321b
                               at /rustc/90743e7298aca107ddaa0c202a4d3604e29bfeb6/library/std/src/panicking.rs:286:9
  10:     0x7f3f3fce5824 - <rustc_driver[a4af459bb9807b28]::DEFAULT_HOOK::{closure#0}::{closure#0} as core[7004993c4fa7d925]::ops::function::FnOnce<(&core[7004993c4fa7d925]::panic::panic_info::PanicInfo,)>>::call_once::{shim:vtable#0}
  11:     0x7f3f40a22dd9 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hbb63890df2a28e48
                               at /rustc/90743e7298aca107ddaa0c202a4d3604e29bfeb6/library/alloc/src/boxed.rs:2001:9
  12:     0x7f3f40a22dd9 - std::panicking::rust_panic_with_hook::h4b1447a24e3e94f8
                               at /rustc/90743e7298aca107ddaa0c202a4d3604e29bfeb6/library/std/src/panicking.rs:692:13
  13:     0x7f3f4010ec11 - std[c44ab7e3d3d4e36a]::panicking::begin_panic::<rustc_errors[25ac01a7cd1ad6e4]::ExplicitBug>::{closure#0}
  14:     0x7f3f4010e776 - std[c44ab7e3d3d4e36a]::sys_common::backtrace::__rust_end_short_backtrace::<std[c44ab7e3d3d4e36a]::panicking::begin_panic<rustc_errors[25ac01a7cd1ad6e4]::ExplicitBug>::{closure#0}, !>
  15:     0x7f3f40176c26 - std[c44ab7e3d3d4e36a]::panicking::begin_panic::<rustc_errors[25ac01a7cd1ad6e4]::ExplicitBug>
  16:     0x7f3f4010e766 - std[c44ab7e3d3d4e36a]::panic::panic_any::<rustc_errors[25ac01a7cd1ad6e4]::ExplicitBug>
  17:     0x7f3f4010d65d - <rustc_errors[25ac01a7cd1ad6e4]::HandlerInner>::bug::<&alloc[3b3f0114a095882a]::string::String>
  18:     0x7f3f4010d0d0 - <rustc_errors[25ac01a7cd1ad6e4]::Handler>::bug::<&alloc[3b3f0114a095882a]::string::String>
  19:     0x7f3f401d947d - rustc_middle[e3d6ddb3c6f8799a]::ty::context::tls::with_context_opt::<rustc_middle[e3d6ddb3c6f8799a]::ty::context::tls::with_opt<rustc_middle[e3d6ddb3c6f8799a]::util::bug::opt_span_bug_fmt<rustc_span[bc5b46e63c35e1c0]::span_encoding::Span>::{closure#0}, ()>::{closure#0}, ()>
  20:     0x7f3f401db636 - rustc_middle[e3d6ddb3c6f8799a]::util::bug::opt_span_bug_fmt::<rustc_span[bc5b46e63c35e1c0]::span_encoding::Span>
  21:     0x7f3f3df65043 - rustc_middle[e3d6ddb3c6f8799a]::util::bug::bug_fmt
  22:     0x7f3f401c1e32 - <rustc_middle[e3d6ddb3c6f8799a]::ty::subst::SubstFolder>::type_param_out_of_range
  23:     0x7f3f3dd34885 - <rustc_middle[e3d6ddb3c6f8799a]::ty::subst::SubstFolder as rustc_middle[e3d6ddb3c6f8799a]::ty::fold::FallibleTypeFolder>::try_fold_ty
  24:     0x7f3f3ddc3f84 - <rustc_middle[e3d6ddb3c6f8799a]::ty::generics::GenericPredicates>::instantiate_into
  25:     0x7f3f3ddc3c7f - <rustc_middle[e3d6ddb3c6f8799a]::ty::generics::GenericPredicates>::instantiate
  26:     0x7f3f3e4dc9e5 - rustc_trait_selection[572e1522d08a21fc]::traits::project::opt_normalize_projection_type
  27:     0x7f3f3e4c8c1e - <rustc_trait_selection[572e1522d08a21fc]::traits::project::AssocTypeNormalizer as rustc_middle[e3d6ddb3c6f8799a]::ty::fold::TypeFolder>::fold_ty
  28:     0x7f3f3e4985b9 - <&rustc_middle[e3d6ddb3c6f8799a]::ty::list::List<rustc_middle[e3d6ddb3c6f8799a]::ty::Ty> as rustc_middle[e3d6ddb3c6f8799a]::ty::fold::TypeFoldable>::try_fold_with::<rustc_trait_selection[572e1522d08a21fc]::traits::project::AssocTypeNormalizer>
  29:     0x7f3f3e497b4e - <rustc_infer[c21feda1ece992cd]::infer::InferCtxt as rustc_trait_selection[572e1522d08a21fc]::infer::InferCtxtExt>::partially_normalize_associated_types_in::<(rustc_middle[e3d6ddb3c6f8799a]::ty::sty::FnSig, rustc_middle[e3d6ddb3c6f8799a]::ty::InstantiatedPredicates)>
  30:     0x7f3f3e299c44 - <rustc_hir_typeck[be3388c9a0d8ddb6]::method::confirm::ConfirmContext>::confirm
  31:     0x7f3f3e25da5a - <rustc_hir_typeck[be3388c9a0d8ddb6]::fn_ctxt::FnCtxt>::lookup_method
  32:     0x7f3f3e23b448 - <rustc_hir_typeck[be3388c9a0d8ddb6]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  33:     0x7f3f3df0d7cc - <rustc_hir_typeck[be3388c9a0d8ddb6]::fn_ctxt::FnCtxt>::check_argument_types
  34:     0x7f3f3e28b535 - <rustc_hir_typeck[be3388c9a0d8ddb6]::fn_ctxt::FnCtxt>::check_call
  35:     0x7f3f3e23ac00 - <rustc_hir_typeck[be3388c9a0d8ddb6]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  36:     0x7f3f3e2a364f - <rustc_hir_typeck[be3388c9a0d8ddb6]::fn_ctxt::FnCtxt>::check_match::{closure#0}
  37:     0x7f3f3e23d1da - <rustc_hir_typeck[be3388c9a0d8ddb6]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  38:     0x7f3f3df0d7cc - <rustc_hir_typeck[be3388c9a0d8ddb6]::fn_ctxt::FnCtxt>::check_argument_types
  39:     0x7f3f3e28b535 - <rustc_hir_typeck[be3388c9a0d8ddb6]::fn_ctxt::FnCtxt>::check_call
  40:     0x7f3f3e23ac00 - <rustc_hir_typeck[be3388c9a0d8ddb6]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  41:     0x7f3f3e2a364f - <rustc_hir_typeck[be3388c9a0d8ddb6]::fn_ctxt::FnCtxt>::check_match::{closure#0}
  42:     0x7f3f3e23d1da - <rustc_hir_typeck[be3388c9a0d8ddb6]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  43:     0x7f3f3e27e682 - <rustc_hir_typeck[be3388c9a0d8ddb6]::fn_ctxt::FnCtxt>::check_decl
  44:     0x7f3f3e27b6fa - <rustc_hir_typeck[be3388c9a0d8ddb6]::fn_ctxt::FnCtxt>::check_block_with_expected
  45:     0x7f3f3e23b376 - <rustc_hir_typeck[be3388c9a0d8ddb6]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  46:     0x7f3f3ec53546 - <rustc_hir_typeck[be3388c9a0d8ddb6]::fn_ctxt::FnCtxt>::check_return_expr
  47:     0x7f3f3ec50eda - rustc_hir_typeck[be3388c9a0d8ddb6]::check::check_fn
  48:     0x7f3f3e2da586 - <rustc_hir_typeck[be3388c9a0d8ddb6]::fn_ctxt::FnCtxt>::check_expr_closure
  49:     0x7f3f3e23f0c9 - <rustc_hir_typeck[be3388c9a0d8ddb6]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  50:     0x7f3f3df0d7cc - <rustc_hir_typeck[be3388c9a0d8ddb6]::fn_ctxt::FnCtxt>::check_argument_types
  51:     0x7f3f3e28b535 - <rustc_hir_typeck[be3388c9a0d8ddb6]::fn_ctxt::FnCtxt>::check_call
  52:     0x7f3f3e23ac00 - <rustc_hir_typeck[be3388c9a0d8ddb6]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  53:     0x7f3f3e27e682 - <rustc_hir_typeck[be3388c9a0d8ddb6]::fn_ctxt::FnCtxt>::check_decl
  54:     0x7f3f3e27b6fa - <rustc_hir_typeck[be3388c9a0d8ddb6]::fn_ctxt::FnCtxt>::check_block_with_expected
  55:     0x7f3f3e23b376 - <rustc_hir_typeck[be3388c9a0d8ddb6]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  56:     0x7f3f3ec53546 - <rustc_hir_typeck[be3388c9a0d8ddb6]::fn_ctxt::FnCtxt>::check_return_expr
  57:     0x7f3f3ec50eda - rustc_hir_typeck[be3388c9a0d8ddb6]::check::check_fn
  58:     0x7f3f3ec3c643 - rustc_hir_typeck[be3388c9a0d8ddb6]::typeck
  59:     0x7f3f3e190163 - <rustc_query_system[dc96433844bf4855]::dep_graph::graph::DepGraph<rustc_middle[e3d6ddb3c6f8799a]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[e3d6ddb3c6f8799a]::ty::context::TyCtxt, rustc_span[bc5b46e63c35e1c0]::def_id::LocalDefId, &rustc_middle[e3d6ddb3c6f8799a]::ty::context::TypeckResults>
  60:     0x7f3f3e188311 - rustc_query_system[dc96433844bf4855]::query::plumbing::try_execute_query::<rustc_query_impl[2c7253b64d5debaa]::plumbing::QueryCtxt, rustc_query_system[dc96433844bf4855]::query::caches::DefaultCache<rustc_span[bc5b46e63c35e1c0]::def_id::LocalDefId, &rustc_middle[e3d6ddb3c6f8799a]::ty::context::TypeckResults>>
  61:     0x7f3f3f4f69d8 - rustc_data_structures[e4382d39faf37387]::sync::par_for_each_in::<&[rustc_span[bc5b46e63c35e1c0]::def_id::LocalDefId], <rustc_middle[e3d6ddb3c6f8799a]::hir::map::Map>::par_body_owners<rustc_hir_typeck[be3388c9a0d8ddb6]::typeck_item_bodies::{closure#0}>::{closure#0}>
  62:     0x7f3f3f4f66b3 - rustc_hir_typeck[be3388c9a0d8ddb6]::typeck_item_bodies
  63:     0x7f3f3f3f03d9 - <rustc_query_system[dc96433844bf4855]::dep_graph::graph::DepGraph<rustc_middle[e3d6ddb3c6f8799a]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[e3d6ddb3c6f8799a]::ty::context::TyCtxt, (), ()>
  64:     0x7f3f3f3ef37d - rustc_query_system[dc96433844bf4855]::query::plumbing::try_execute_query::<rustc_query_impl[2c7253b64d5debaa]::plumbing::QueryCtxt, rustc_query_system[dc96433844bf4855]::query::caches::DefaultCache<(), ()>>
  65:     0x7f3f3f3eed07 - rustc_query_system[dc96433844bf4855]::query::plumbing::get_query::<rustc_query_impl[2c7253b64d5debaa]::queries::typeck_item_bodies, rustc_query_impl[2c7253b64d5debaa]::plumbing::QueryCtxt>
  66:     0x7f3f3e0ffb5a - <rustc_session[d7fba84d2e88e76]::session::Session>::time::<(), rustc_hir_analysis[59acc8331deb892c]::check_crate::{closure#7}>
  67:     0x7f3f3e0fed1b - rustc_hir_analysis[59acc8331deb892c]::check_crate
  68:     0x7f3f3e0fe94b - rustc_interface[3232fd3fb3a640fd]::passes::analysis
  69:     0x7f3f3f54cd8e - <rustc_query_system[dc96433844bf4855]::dep_graph::graph::DepGraph<rustc_middle[e3d6ddb3c6f8799a]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[e3d6ddb3c6f8799a]::ty::context::TyCtxt, (), core[7004993c4fa7d925]::result::Result<(), rustc_errors[25ac01a7cd1ad6e4]::ErrorGuaranteed>>
  70:     0x7f3f3f54c104 - rustc_query_system[dc96433844bf4855]::query::plumbing::try_execute_query::<rustc_query_impl[2c7253b64d5debaa]::plumbing::QueryCtxt, rustc_query_system[dc96433844bf4855]::query::caches::DefaultCache<(), core[7004993c4fa7d925]::result::Result<(), rustc_errors[25ac01a7cd1ad6e4]::ErrorGuaranteed>>>
  71:     0x7f3f3f54bb87 - rustc_query_system[dc96433844bf4855]::query::plumbing::get_query::<rustc_query_impl[2c7253b64d5debaa]::queries::analysis, rustc_query_impl[2c7253b64d5debaa]::plumbing::QueryCtxt>
  72:     0x7f3f3f08c27d - <rustc_interface[3232fd3fb3a640fd]::passes::QueryContext>::enter::<rustc_driver[a4af459bb9807b28]::run_compiler::{closure#1}::{closure#2}::{closure#3}, core[7004993c4fa7d925]::result::Result<(), rustc_errors[25ac01a7cd1ad6e4]::ErrorGuaranteed>>
  73:     0x7f3f3f08872f - <rustc_interface[3232fd3fb3a640fd]::interface::Compiler>::enter::<rustc_driver[a4af459bb9807b28]::run_compiler::{closure#1}::{closure#2}, core[7004993c4fa7d925]::result::Result<core[7004993c4fa7d925]::option::Option<rustc_interface[3232fd3fb3a640fd]::queries::Linker>, rustc_errors[25ac01a7cd1ad6e4]::ErrorGuaranteed>>
  74:     0x7f3f3f080272 - rustc_span[bc5b46e63c35e1c0]::with_source_map::<core[7004993c4fa7d925]::result::Result<(), rustc_errors[25ac01a7cd1ad6e4]::ErrorGuaranteed>, rustc_interface[3232fd3fb3a640fd]::interface::run_compiler<core[7004993c4fa7d925]::result::Result<(), rustc_errors[25ac01a7cd1ad6e4]::ErrorGuaranteed>, rustc_driver[a4af459bb9807b28]::run_compiler::{closure#1}>::{closure#0}::{closure#1}>
  75:     0x7f3f3f07fd69 - <scoped_tls[51b8cb41e419758d]::ScopedKey<rustc_span[bc5b46e63c35e1c0]::SessionGlobals>>::set::<rustc_interface[3232fd3fb3a640fd]::interface::run_compiler<core[7004993c4fa7d925]::result::Result<(), rustc_errors[25ac01a7cd1ad6e4]::ErrorGuaranteed>, rustc_driver[a4af459bb9807b28]::run_compiler::{closure#1}>::{closure#0}, core[7004993c4fa7d925]::result::Result<(), rustc_errors[25ac01a7cd1ad6e4]::ErrorGuaranteed>>
  76:     0x7f3f3f07f378 - std[c44ab7e3d3d4e36a]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[3232fd3fb3a640fd]::util::run_in_thread_pool_with_globals<rustc_interface[3232fd3fb3a640fd]::interface::run_compiler<core[7004993c4fa7d925]::result::Result<(), rustc_errors[25ac01a7cd1ad6e4]::ErrorGuaranteed>, rustc_driver[a4af459bb9807b28]::run_compiler::{closure#1}>::{closure#0}, core[7004993c4fa7d925]::result::Result<(), rustc_errors[25ac01a7cd1ad6e4]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[7004993c4fa7d925]::result::Result<(), rustc_errors[25ac01a7cd1ad6e4]::ErrorGuaranteed>>
  77:     0x7f3f3f07f09c - <<std[c44ab7e3d3d4e36a]::thread::Builder>::spawn_unchecked_<rustc_interface[3232fd3fb3a640fd]::util::run_in_thread_pool_with_globals<rustc_interface[3232fd3fb3a640fd]::interface::run_compiler<core[7004993c4fa7d925]::result::Result<(), rustc_errors[25ac01a7cd1ad6e4]::ErrorGuaranteed>, rustc_driver[a4af459bb9807b28]::run_compiler::{closure#1}>::{closure#0}, core[7004993c4fa7d925]::result::Result<(), rustc_errors[25ac01a7cd1ad6e4]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[7004993c4fa7d925]::result::Result<(), rustc_errors[25ac01a7cd1ad6e4]::ErrorGuaranteed>>::{closure#1} as core[7004993c4fa7d925]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  78:     0x7f3f40a29d53 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h6202d10b0224e7b0
                               at /rustc/90743e7298aca107ddaa0c202a4d3604e29bfeb6/library/alloc/src/boxed.rs:1987:9
  79:     0x7f3f40a29d53 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h4dbea73c9cec160b
                               at /rustc/90743e7298aca107ddaa0c202a4d3604e29bfeb6/library/alloc/src/boxed.rs:1987:9
  80:     0x7f3f40a29d53 - std::sys::unix::thread::Thread::new::thread_start::h0a2f4c32ba2f2278
                               at /rustc/90743e7298aca107ddaa0c202a4d3604e29bfeb6/library/std/src/sys/unix/thread.rs:108:17
  81:     0x7f3f3c8eb8fd - <unknown>
  82:     0x7f3f3c96da60 - <unknown>
  83:                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 1.66.1 (90743e729 2023-01-10) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type bin -C embed-bitcode=no -C debuginfo=2 -C incremental=[REDACTED]

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
#0 [typeck] type-checking `main`
#1 [typeck_item_bodies] type-checking all item bodies
#2 [analysis] running analysis passes on this crate
end of query stack
Some errors have detailed explanations: E0195, E0449, E0706.
For more information about an error, try `rustc --explain E0195`.

[albertlarsan68]

@rustbot label +I-ICE +T-compiler

[clubby789]

Can you post a reproducible example? I'm not able to get an ICE with the snippet here

[zskamljic]

Sure, I was under the impression that the trait alone was causing it, it looks like it's more than just one thing. Attached the zip with minimal code needed to cause the issue.

ice.zip

[clubby789]

While the ICE happens in stable, there is no ICE on beta and nightly (although normal errors are still reported), so this has likely been fixed upstream

[albertlarsan68]

With "regression" meaning no ICE:

searched nightlies: from nightly-2022-10-29 to nightly-2022-12-10
regressed nightly: nightly-2022-11-10
searched commit range: 85f4f41...e75aab0
regressed commit: 91385d5 (#104179) maybe #100508 ?

bisected with cargo-bisect-rustc v0.6.5

Host triple: x86_64-unknown-linux-gnu
Reproduce with:

cargo bisect-rustc --access=github --start=1.66.1 --end=2022-12-10 --regress=non-ice -- build

[albertlarsan68]

Well, it turns out it is #103827. cc @compiler-errors @wesleywiser

[compiler-errors]

@albertlarsan68 thanks for the heads up, though given that that PR fixed the issue rather than introduced the issue, I don't think the author and reviewer necessarily need pings 😝

[albertlarsan68]

It was to give heads up if this needs a test or it was the goal of the PR to fix this issue.

[compiler-errors]

@albertlarsan68 feel free to make a minimal test if you can -- I haven't looked at the zip file yet, does it depend on any nightly features?

Probably fixed by the changes to check_substs_compatible.

[compiler-errors]

Also, the ICE in the issue says:

note: rustc 1.66.1 (90743e7 2023-01-10)

@albertlarsan68 was this ICE reintroduced in a recent nightly?

[albertlarsan68]

No, it is just that your PR is the one that fixed the ICE