ICE `inconsistent resolution for an import`

[matthiaskrgr]

Code

use foo::*;

mod foo {
    pub mod bar {
        pub mod bar {
            pub mod bar {}
        }
    }
}

use bar::bar;
use bar::*;

Meta

rustc --version --verbose:

rustc 1.70.0-nightly (22f247c6f 2023-03-13)
binary: rustc
commit-hash: 22f247c6f3ed388cb702d01c2ff27da658a8b353
commit-date: 2023-03-13
host: x86_64-unknown-linux-gnu
release: 1.70.0-nightly
LLVM version: 15.0.7

Error output

<output>

Backtrace

thread 'rustc' panicked at 'compiler/rustc_resolve/src/imports.rs:704:25: inconsistent resolution for an import', /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/compiler/rustc_middle/src/util/bug.rs:36:26
stack backtrace:
   0:     0x7f57eb2c259a - std::backtrace_rs::backtrace::libunwind::trace::h595f06c70adcc478
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7f57eb2c259a - std::backtrace_rs::backtrace::trace_unsynchronized::h177a0149c76cdde9
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f57eb2c259a - std::sys_common::backtrace::_print_fmt::hc0701fd2c3530c58
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7f57eb2c259a - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hd4cd115d8750fd6c
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f57eb32439e - core::fmt::write::h93e2f5923c7eca08
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/core/src/fmt/mod.rs:1213:17
   5:     0x7f57eb2b2be5 - std::io::Write::write_fmt::h8162dbb45f0b9e62
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/std/src/io/mod.rs:1682:15
   6:     0x7f57eb2c2365 - std::sys_common::backtrace::_print::h1835ef8a8f9066da
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/std/src/sys_common/backtrace.rs:47:5
   7:     0x7f57eb2c2365 - std::sys_common::backtrace::print::hcb5e6388b9235f41
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/std/src/sys_common/backtrace.rs:34:9
   8:     0x7f57eb2c512f - std::panicking::default_hook::{{closure}}::h9c084969ccf9a722
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/std/src/panicking.rs:267:22
   9:     0x7f57eb2c4e6b - std::panicking::default_hook::h68fa2ba3c3c6c12f
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/std/src/panicking.rs:286:9
  10:     0x7f57ea0b56e4 - <rustc_driver[f4ad927b3c57833d]::DEFAULT_HOOK::{closure#0}::{closure#0} as core[d16e85342ea223d9]::ops::function::FnOnce<(&core[d16e85342ea223d9]::panic::panic_info::PanicInfo,)>>::call_once::{shim:vtable#0}
  11:     0x7f57eb2c596a - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h4e6ced11e07d8b24
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/alloc/src/boxed.rs:2002:9
  12:     0x7f57eb2c596a - std::panicking::rust_panic_with_hook::h8d5c434518ef298c
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/std/src/panicking.rs:692:13
  13:     0x7f57eaaf07f2 - std[3da461b304582a2c]::panicking::begin_panic::<alloc[5b05b59796bdfb5c]::string::String>::{closure#0}
  14:     0x7f57eaaf032a - std[3da461b304582a2c]::sys_common::backtrace::__rust_end_short_backtrace::<std[3da461b304582a2c]::panicking::begin_panic<alloc[5b05b59796bdfb5c]::string::String>::{closure#0}, !>
  15:     0x7f57eaab8351 - std[3da461b304582a2c]::panicking::begin_panic::<alloc[5b05b59796bdfb5c]::string::String>
  16:     0x7f57eaa9f85d - rustc_middle[eb7209f5870e9fb7]::util::bug::opt_span_bug_fmt::<rustc_span[4bb3e3ecb57f95d5]::span_encoding::Span>::{closure#0}
  17:     0x7f57eaa9f8da - rustc_middle[eb7209f5870e9fb7]::ty::context::tls::with_opt::<rustc_middle[eb7209f5870e9fb7]::util::bug::opt_span_bug_fmt<rustc_span[4bb3e3ecb57f95d5]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  18:     0x7f57eaa9f0c6 - rustc_middle[eb7209f5870e9fb7]::ty::context::tls::with_context_opt::<rustc_middle[eb7209f5870e9fb7]::ty::context::tls::with_opt<rustc_middle[eb7209f5870e9fb7]::util::bug::opt_span_bug_fmt<rustc_span[4bb3e3ecb57f95d5]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  19:     0x7f57eaa9f086 - rustc_middle[eb7209f5870e9fb7]::util::bug::opt_span_bug_fmt::<rustc_span[4bb3e3ecb57f95d5]::span_encoding::Span>
  20:     0x7f57eaa9f044 - rustc_middle[eb7209f5870e9fb7]::util::bug::span_bug_fmt::<rustc_span[4bb3e3ecb57f95d5]::span_encoding::Span>
  21:     0x7f57e92fbd37 - <rustc_resolve[b9ffdbb06ddc059e]::imports::ImportResolver>::finalize_import
  22:     0x7f57e92f9bfd - <rustc_resolve[b9ffdbb06ddc059e]::imports::ImportResolver>::finalize_imports
  23:     0x7f57e92a2132 - <rustc_session[b580c712976fc965]::session::Session>::time::<(), <rustc_resolve[b9ffdbb06ddc059e]::Resolver>::resolve_crate::{closure#0}>
  24:     0x7f57e92a05b1 - rustc_interface[3781616314f5d936]::passes::configure_and_expand
  25:     0x7f57e929fac6 - <rustc_interface[3781616314f5d936]::queries::Queries>::expansion
  26:     0x7f57e929a719 - <rustc_interface[3781616314f5d936]::queries::Queries>::global_ctxt
  27:     0x7f57e929320d - rustc_span[4bb3e3ecb57f95d5]::with_source_map::<core[d16e85342ea223d9]::result::Result<(), rustc_errors[41d09747e2f98dea]::ErrorGuaranteed>, rustc_interface[3781616314f5d936]::interface::run_compiler<core[d16e85342ea223d9]::result::Result<(), rustc_errors[41d09747e2f98dea]::ErrorGuaranteed>, rustc_driver[f4ad927b3c57833d]::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
  28:     0x7f57e928bce4 - <scoped_tls[1a6b834cb64348ef]::ScopedKey<rustc_span[4bb3e3ecb57f95d5]::SessionGlobals>>::set::<rustc_interface[3781616314f5d936]::interface::run_compiler<core[d16e85342ea223d9]::result::Result<(), rustc_errors[41d09747e2f98dea]::ErrorGuaranteed>, rustc_driver[f4ad927b3c57833d]::run_compiler::{closure#1}>::{closure#0}, core[d16e85342ea223d9]::result::Result<(), rustc_errors[41d09747e2f98dea]::ErrorGuaranteed>>
  29:     0x7f57e928b3e2 - std[3da461b304582a2c]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[3781616314f5d936]::util::run_in_thread_pool_with_globals<rustc_interface[3781616314f5d936]::interface::run_compiler<core[d16e85342ea223d9]::result::Result<(), rustc_errors[41d09747e2f98dea]::ErrorGuaranteed>, rustc_driver[f4ad927b3c57833d]::run_compiler::{closure#1}>::{closure#0}, core[d16e85342ea223d9]::result::Result<(), rustc_errors[41d09747e2f98dea]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[d16e85342ea223d9]::result::Result<(), rustc_errors[41d09747e2f98dea]::ErrorGuaranteed>>
  30:     0x7f57e928b18a - <<std[3da461b304582a2c]::thread::Builder>::spawn_unchecked_<rustc_interface[3781616314f5d936]::util::run_in_thread_pool_with_globals<rustc_interface[3781616314f5d936]::interface::run_compiler<core[d16e85342ea223d9]::result::Result<(), rustc_errors[41d09747e2f98dea]::ErrorGuaranteed>, rustc_driver[f4ad927b3c57833d]::run_compiler::{closure#1}>::{closure#0}, core[d16e85342ea223d9]::result::Result<(), rustc_errors[41d09747e2f98dea]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[d16e85342ea223d9]::result::Result<(), rustc_errors[41d09747e2f98dea]::ErrorGuaranteed>>::{closure#1} as core[d16e85342ea223d9]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  31:     0x7f57eb2cf823 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h1c0f3664d7ced314
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/alloc/src/boxed.rs:1988:9
  32:     0x7f57eb2cf823 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h67647c21c6c4968a
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/alloc/src/boxed.rs:1988:9
  33:     0x7f57eb2cf823 - std::sys::unix::thread::Thread::new::thread_start::h355d348ba593a22c
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/std/src/sys/unix/thread.rs:108:17
  34:     0x7f57e6c67bb5 - <unknown>
  35:     0x7f57e6ce9d90 - <unknown>
  36:                0x0 - <unknown>

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 1.68.0 (2c8cc3432 2023-03-06) running on x86_64-unknown-linux-gnu

query stack during panic:
end of query stack

[matthiaskrgr]

********************************************************************************
Regression in nightly-2018-11-20
********************************************************************************

fetching https://static.rust-lang.org/dist/2018-11-19/channel-rust-nightly-git-commit-hash.txt
nightly manifest 2018-11-19: 40 B / 40 B [============================================================================================] 100.00 % 528.10 KB/s converted 2018-11-19 to 13c9439925797cd7a65c917d047c07a500d9bfe6
fetching https://static.rust-lang.org/dist/2018-11-20/channel-rust-nightly-git-commit-hash.txt
nightly manifest 2018-11-20: 40 B / 40 B [============================================================================================] 100.00 % 549.84 KB/s converted 2018-11-20 to 5aff30734b0e1056b1003459fbb27af199f51822
looking for regression commit between 2018-11-19 and 2018-11-20
opening existing repository at "rust.git"
Found origin remote under name `origin`
refreshing repository at "rust.git"
fetching (via local git) commits from 13c9439925797cd7a65c917d047c07a500d9bfe6 to 5aff30734b0e1056b1003459fbb27af199f51822
opening existing repository at "rust.git"
Found origin remote under name `origin`
refreshing repository at "rust.git"
looking up first commit
looking up second commit
checking that commits are by bors and thus have ci artifacts...
finding bors merge commits
found 6 bors merge commits in the specified range
  commit[0] 2018-11-18UTC: Auto merge of #56017 - alexcrichton:debug-test, r=alexcrichton
  commit[1] 2018-11-18UTC: Auto merge of #55672 - RalfJung:miri-extern-types, r=eddyb
  commit[2] 2018-11-19UTC: Auto merge of #56042 - petrochenkov:nuni, r=petrochenkov
  commit[3] 2018-11-19UTC: Auto merge of #56051 - pietroalbini:rollup, r=pietroalbini
  commit[4] 2018-11-19UTC: Auto merge of #56060 - nrc:save-path-fallback, r=zackmdavis
  commit[5] 2018-11-19UTC: Auto merge of #55971 - SergioBenitez:skip-non-semantic, r=alexcrichton
ERROR: no CI builds available between 13c9439925797cd7a65c917d047c07a500d9bfe6 and 5aff30734b0e1056b1003459fbb27af199f51822 within last 167 days

[langston-barrett]

@rustbot label +S-bug-has-mcve

[Ezrashaw]

What is the expected output here? Can this actually compile, and if so, what bar does use bar::*; refer to?