Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

ICE: un_derefer.rs: index out of bounds: the len is 0 but the index is 0 #122904

Open
matthiaskrgr opened this issue Mar 22, 2024 · 1 comment
Open
Labels
C-bug Category: This is a bug. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ S-bug-has-test Status: This bug is tracked inside the repo by a `known-bug` test. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.

Comments

@matthiaskrgr
Copy link
Member

auto-reduced (treereduce-rust):

trait T {}

type Alias<'a> = impl T;

struct S;
impl<'a> T for &'a S {}

fn with_positive(fun: impl Fn(Alias<'_>)) {
    with_positive(|&n| ());
}

original:

trait T {}

type Alias<'a> = impl T;

struct S;
impl<'a> T for &'a S {}

fn with_positive(fun: impl Fn(Alias<'_>)) {
    with_positive(|&n| ());
}

fn main(Alias<'_>) {
    with_positive(|&a| ());
}

Version information

rustc 1.79.0-nightly (b3df0d7e5 2024-03-22)
binary: rustc
commit-hash: b3df0d7e5ef5f7dbeeca3fb289c65680ad013f87
commit-date: 2024-03-22
host: x86_64-unknown-linux-gnu
release: 1.79.0-nightly
LLVM version: 18.1.2

Command:
/home/matthias/.rustup/toolchains/master/bin/rustc

Program output

error[E0658]: `impl Trait` in type aliases is unstable
 --> /tmp/icemaker_global_tempdir.Y54EKqIXoWUB/rustc_testrunner_tmpdir_reporting.e4LbEvdE1kIj/mvce.rs:3:18
  |
3 | type Alias<'a> = impl T;
  |                  ^^^^^^
  |
  = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
  = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable
  = note: this compiler was built on 2024-03-22; consider upgrading it if it is out of date

error[E0601]: `main` function not found in crate `mvce`
  --> /tmp/icemaker_global_tempdir.Y54EKqIXoWUB/rustc_testrunner_tmpdir_reporting.e4LbEvdE1kIj/mvce.rs:10:2
   |
10 | }
   |  ^ consider adding a `main` function to `/tmp/icemaker_global_tempdir.Y54EKqIXoWUB/rustc_testrunner_tmpdir_reporting.e4LbEvdE1kIj/mvce.rs`

warning: unused variable: `fun`
 --> /tmp/icemaker_global_tempdir.Y54EKqIXoWUB/rustc_testrunner_tmpdir_reporting.e4LbEvdE1kIj/mvce.rs:8:18
  |
8 | fn with_positive(fun: impl Fn(Alias<'_>)) {
  |                  ^^^ help: if this is intentional, prefix it with an underscore: `_fun`
  |
  = note: `#[warn(unused_variables)]` on by default

warning: function cannot return without recursing
 --> /tmp/icemaker_global_tempdir.Y54EKqIXoWUB/rustc_testrunner_tmpdir_reporting.e4LbEvdE1kIj/mvce.rs:8:1
  |
8 | fn with_positive(fun: impl Fn(Alias<'_>)) {
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot return without recursing
9 |     with_positive(|&n| ());
  |     ---------------------- recursive call site
  |
  = help: a `loop` may express intention better if this is on purpose
  = note: `#[warn(unconditional_recursion)]` on by default

warning: unused variable: `n`
 --> /tmp/icemaker_global_tempdir.Y54EKqIXoWUB/rustc_testrunner_tmpdir_reporting.e4LbEvdE1kIj/mvce.rs:9:21
  |
9 |     with_positive(|&n| ());
  |                     ^ help: if this is intentional, prefix it with an underscore: `_n`

error[E0507]: cannot move out of a shared reference
 --> /tmp/icemaker_global_tempdir.Y54EKqIXoWUB/rustc_testrunner_tmpdir_reporting.e4LbEvdE1kIj/mvce.rs:9:20
  |
9 |     with_positive(|&n| ());
  |                    ^-
  |                     |
  |                     data moved here
  |                     move occurs because `n` has type `S`, which does not implement the `Copy` trait
  |
help: consider removing the borrow
  |
9 -     with_positive(|&n| ());
9 +     with_positive(|n| ());
  |

thread 'rustc' panicked at /rustc/b3df0d7e5ef5f7dbeeca3fb289c65680ad013f87/compiler/rustc_mir_dataflow/src/un_derefer.rs:67:20:
index out of bounds: the len is 0 but the index is 0
stack backtrace:
   0:     0x737eb0d9afa5 - std::backtrace_rs::backtrace::libunwind::trace::h4515e3e00f57996f
                               at /rustc/b3df0d7e5ef5f7dbeeca3fb289c65680ad013f87/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
   1:     0x737eb0d9afa5 - std::backtrace_rs::backtrace::trace_unsynchronized::h1e64ac1112175e4e
                               at /rustc/b3df0d7e5ef5f7dbeeca3fb289c65680ad013f87/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x737eb0d9afa5 - std::sys_common::backtrace::_print_fmt::h182160b5ad873150
                               at /rustc/b3df0d7e5ef5f7dbeeca3fb289c65680ad013f87/library/std/src/sys_common/backtrace.rs:68:5
   3:     0x737eb0d9afa5 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h432843f19f8b2b6d
                               at /rustc/b3df0d7e5ef5f7dbeeca3fb289c65680ad013f87/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x737eb0debfeb - core::fmt::rt::Argument::fmt::hb59bbd21accf1885
                               at /rustc/b3df0d7e5ef5f7dbeeca3fb289c65680ad013f87/library/core/src/fmt/rt.rs:142:9
   5:     0x737eb0debfeb - core::fmt::write::haf243cf4605e411d
                               at /rustc/b3df0d7e5ef5f7dbeeca3fb289c65680ad013f87/library/core/src/fmt/mod.rs:1153:17
   6:     0x737eb0d8fd3f - std::io::Write::write_fmt::hd8c8c68b4f5b8f11
                               at /rustc/b3df0d7e5ef5f7dbeeca3fb289c65680ad013f87/library/std/src/io/mod.rs:1843:15
   7:     0x737eb0d9ad7e - std::sys_common::backtrace::_print::h0ec933d6103e5515
                               at /rustc/b3df0d7e5ef5f7dbeeca3fb289c65680ad013f87/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x737eb0d9ad7e - std::sys_common::backtrace::print::h55136fa64edb86e6
                               at /rustc/b3df0d7e5ef5f7dbeeca3fb289c65680ad013f87/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x737eb0d9d9f9 - std::panicking::default_hook::{{closure}}::h28cbeefc01b40f52
  10:     0x737eb0d9d763 - std::panicking::default_hook::h15e904210c67a3ca
                               at /rustc/b3df0d7e5ef5f7dbeeca3fb289c65680ad013f87/library/std/src/panicking.rs:292:9
  11:     0x737ead5cb6bf - std[48784e9e46568672]::panicking::update_hook::<alloc[590c7545ac68a568]::boxed::Box<rustc_driver_impl[9e9e6466696ec967]::install_ice_hook::{closure#0}>>::{closure#0}
  12:     0x737eb0d9e150 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::had664932fcaf7f86
                               at /rustc/b3df0d7e5ef5f7dbeeca3fb289c65680ad013f87/library/alloc/src/boxed.rs:2029:9
  13:     0x737eb0d9e150 - std::panicking::rust_panic_with_hook::h9f23cc8a1f418825
                               at /rustc/b3df0d7e5ef5f7dbeeca3fb289c65680ad013f87/library/std/src/panicking.rs:783:13
  14:     0x737eb0d9dea6 - std::panicking::begin_panic_handler::{{closure}}::h6c297ce5a3207845
                               at /rustc/b3df0d7e5ef5f7dbeeca3fb289c65680ad013f87/library/std/src/panicking.rs:657:13
  15:     0x737eb0d9b469 - std::sys_common::backtrace::__rust_end_short_backtrace::h7e27b03308c1610a
                               at /rustc/b3df0d7e5ef5f7dbeeca3fb289c65680ad013f87/library/std/src/sys_common/backtrace.rs:171:18
  16:     0x737eb0d9dbd7 - rust_begin_unwind
                               at /rustc/b3df0d7e5ef5f7dbeeca3fb289c65680ad013f87/library/std/src/panicking.rs:645:5
  17:     0x737eb0de8486 - core::panicking::panic_fmt::hc62934eef5acbd79
                               at /rustc/b3df0d7e5ef5f7dbeeca3fb289c65680ad013f87/library/core/src/panicking.rs:72:14
  18:     0x737eb0de86a7 - core::panicking::panic_bounds_check::h2ec889bc6f79e4c6
                               at /rustc/b3df0d7e5ef5f7dbeeca3fb289c65680ad013f87/library/core/src/panicking.rs:205:5
  19:     0x737eabbd9ccc - <rustc_mir_dataflow[6337c591d47c40ab]::move_paths::builder::Gatherer<<rustc_mir_transform[b03574829d5a714c]::elaborate_drops::ElaborateDrops as rustc_middle[cfd7f582085b2efd]::mir::MirPass>::run_pass::{closure#0}>>::gather_move
  20:     0x737eabbc2e27 - <rustc_mir_transform[b03574829d5a714c]::elaborate_drops::ElaborateDrops as rustc_middle[cfd7f582085b2efd]::mir::MirPass>::run_pass
  21:     0x737eaea01a0d - rustc_mir_transform[b03574829d5a714c]::pass_manager::run_passes_inner
  22:     0x737eaf17dc4b - rustc_mir_transform[b03574829d5a714c]::mir_drops_elaborated_and_const_checked
  23:     0x737eaf17d563 - rustc_query_impl[82a63e1d7cdec9a7]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[82a63e1d7cdec9a7]::query_impl::mir_drops_elaborated_and_const_checked::dynamic_query::{closure#2}::{closure#0}, rustc_middle[cfd7f582085b2efd]::query::erase::Erased<[u8; 8usize]>>
  24:     0x737eaebfe82e - rustc_query_system[ee3912bf2a9f33a7]::query::plumbing::try_execute_query::<rustc_query_impl[82a63e1d7cdec9a7]::DynamicConfig<rustc_query_system[ee3912bf2a9f33a7]::query::caches::VecCache<rustc_span[9e6cb2d6f72e9bb4]::def_id::LocalDefId, rustc_middle[cfd7f582085b2efd]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[82a63e1d7cdec9a7]::plumbing::QueryCtxt, false>
  25:     0x737eaebfe10c - rustc_query_impl[82a63e1d7cdec9a7]::query_impl::mir_drops_elaborated_and_const_checked::get_query_non_incr::__rust_end_short_backtrace
  26:     0x737eaeea1068 - rustc_interface[7ddcde71cf02e108]::passes::analysis
  27:     0x737eaee9fe51 - rustc_query_impl[82a63e1d7cdec9a7]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[82a63e1d7cdec9a7]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[cfd7f582085b2efd]::query::erase::Erased<[u8; 1usize]>>
  28:     0x737eaf7eb4a5 - rustc_query_system[ee3912bf2a9f33a7]::query::plumbing::try_execute_query::<rustc_query_impl[82a63e1d7cdec9a7]::DynamicConfig<rustc_query_system[ee3912bf2a9f33a7]::query::caches::SingleCache<rustc_middle[cfd7f582085b2efd]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[82a63e1d7cdec9a7]::plumbing::QueryCtxt, false>
  29:     0x737eaf7eb209 - rustc_query_impl[82a63e1d7cdec9a7]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  30:     0x737eaf6870d9 - rustc_interface[7ddcde71cf02e108]::interface::run_compiler::<core[b4a1350c838fc0f9]::result::Result<(), rustc_span[9e6cb2d6f72e9bb4]::ErrorGuaranteed>, rustc_driver_impl[9e9e6466696ec967]::run_compiler::{closure#0}>::{closure#0}
  31:     0x737eaf752399 - std[48784e9e46568672]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[7ddcde71cf02e108]::util::run_in_thread_with_globals<rustc_interface[7ddcde71cf02e108]::util::run_in_thread_pool_with_globals<rustc_interface[7ddcde71cf02e108]::interface::run_compiler<core[b4a1350c838fc0f9]::result::Result<(), rustc_span[9e6cb2d6f72e9bb4]::ErrorGuaranteed>, rustc_driver_impl[9e9e6466696ec967]::run_compiler::{closure#0}>::{closure#0}, core[b4a1350c838fc0f9]::result::Result<(), rustc_span[9e6cb2d6f72e9bb4]::ErrorGuaranteed>>::{closure#0}, core[b4a1350c838fc0f9]::result::Result<(), rustc_span[9e6cb2d6f72e9bb4]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[b4a1350c838fc0f9]::result::Result<(), rustc_span[9e6cb2d6f72e9bb4]::ErrorGuaranteed>>
  32:     0x737eaf7521c6 - <<std[48784e9e46568672]::thread::Builder>::spawn_unchecked_<rustc_interface[7ddcde71cf02e108]::util::run_in_thread_with_globals<rustc_interface[7ddcde71cf02e108]::util::run_in_thread_pool_with_globals<rustc_interface[7ddcde71cf02e108]::interface::run_compiler<core[b4a1350c838fc0f9]::result::Result<(), rustc_span[9e6cb2d6f72e9bb4]::ErrorGuaranteed>, rustc_driver_impl[9e9e6466696ec967]::run_compiler::{closure#0}>::{closure#0}, core[b4a1350c838fc0f9]::result::Result<(), rustc_span[9e6cb2d6f72e9bb4]::ErrorGuaranteed>>::{closure#0}, core[b4a1350c838fc0f9]::result::Result<(), rustc_span[9e6cb2d6f72e9bb4]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[b4a1350c838fc0f9]::result::Result<(), rustc_span[9e6cb2d6f72e9bb4]::ErrorGuaranteed>>::{closure#1} as core[b4a1350c838fc0f9]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  33:     0x737eb0da7919 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h3e016c41180ed802
                               at /rustc/b3df0d7e5ef5f7dbeeca3fb289c65680ad013f87/library/alloc/src/boxed.rs:2015:9
  34:     0x737eb0da7919 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hcf0716ba35a33b0c
                               at /rustc/b3df0d7e5ef5f7dbeeca3fb289c65680ad013f87/library/alloc/src/boxed.rs:2015:9
  35:     0x737eb0da7919 - std::sys::pal::unix::thread::Thread::new::thread_start::hd585680968d21553
                               at /rustc/b3df0d7e5ef5f7dbeeca3fb289c65680ad013f87/library/std/src/sys/pal/unix/thread.rs:108:17
  36:     0x737eb0b4755a - <unknown>
  37:     0x737eb0bc4a3c - <unknown>
  38:                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 1.79.0-nightly (b3df0d7e5 2024-03-22) running on x86_64-unknown-linux-gnu

query stack during panic:
#0 [mir_drops_elaborated_and_const_checked] elaborating drops for `with_positive::{closure#0}`
#1 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to 3 previous errors; 3 warnings emitted

Some errors have detailed explanations: E0507, E0601, E0658.
For more information about an error, try `rustc --explain E0507`.

@matthiaskrgr matthiaskrgr added I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. C-bug Category: This is a bug. labels Mar 22, 2024
@rustbot rustbot added the needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. label Mar 22, 2024
@matthiaskrgr
Copy link
Member Author

#120550

@saethlin saethlin removed the needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. label Apr 8, 2024
@matthiaskrgr matthiaskrgr added the S-bug-has-test Status: This bug is tracked inside the repo by a `known-bug` test. label Apr 15, 2024
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
C-bug Category: This is a bug. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ S-bug-has-test Status: This bug is tracked inside the repo by a `known-bug` test. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
Projects
None yet
Development

No branches or pull requests

3 participants