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ICE: delegation: index out of bounds #128119

Open matthiaskrgr opened 1 month ago

matthiaskrgr commented 1 month ago

auto-reduced (treereduce-rust):

trait Trait {
    reuse to_reuse::foo { self }
}

struct S;

mod to_reuse {
    pub fn foo(&self) -> u32 {}
}

impl Trait  S {
    reuse to_reuse::foo { self }
}

original:

trait Trait {
    reuse to_reuse::foo { self }
}

struct Trait;
struct S;

mod to_reuse {
    pub fn foo(&self) -> u32 {}
}

impl Trait  S {
    reuse to_reuse::foo { self }
}

Version information

rustc 1.82.0-nightly (84c257ebe 2024-07-23)
binary: rustc
commit-hash: 84c257ebe5319ba68ce9a4ce5bca2d89e7127a14
commit-date: 2024-07-23
host: x86_64-unknown-linux-gnu
release: 1.82.0-nightly
LLVM version: 18.1.7

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

Program output

``` error: missing `for` in a trait impl --> /tmp/icemaker_global_tempdir.HWU1MVIGLwj9/rustc_testrunner_tmpdir_reporting.x2Si1gLufU2j/mvce.rs:12:11 | 12 | impl Trait S { | ^^ | help: add `for` here | 12 | impl Trait for S { | +++ error: `self` parameter is only allowed in associated functions --> /tmp/icemaker_global_tempdir.HWU1MVIGLwj9/rustc_testrunner_tmpdir_reporting.x2Si1gLufU2j/mvce.rs:9:16 | 9 | pub fn foo(&self) -> u32 {} | ^^^^^ not semantically valid as function parameter | = note: associated functions are those in `impl` or `trait` definitions error[E0658]: functions delegation is not yet fully implemented --> /tmp/icemaker_global_tempdir.HWU1MVIGLwj9/rustc_testrunner_tmpdir_reporting.x2Si1gLufU2j/mvce.rs:2:5 | 2 | reuse to_reuse::foo { self } | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = note: see issue #118212 for more information = help: add `#![feature(fn_delegation)]` to the crate attributes to enable = note: this compiler was built on 2024-07-23; consider upgrading it if it is out of date error[E0658]: functions delegation is not yet fully implemented --> /tmp/icemaker_global_tempdir.HWU1MVIGLwj9/rustc_testrunner_tmpdir_reporting.x2Si1gLufU2j/mvce.rs:13:5 | 13 | reuse to_reuse::foo { self } | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = note: see issue #118212 for more information = help: add `#![feature(fn_delegation)]` to the crate attributes to enable = note: this compiler was built on 2024-07-23; consider upgrading it if it is out of date thread 'rustc' panicked at compiler/rustc_ast_lowering/src/delegation.rs:334:59: index out of bounds: the len is 0 but the index is 0 stack backtrace: 0: 0x724bccc77215 - std::backtrace_rs::backtrace::libunwind::trace::h079c5b10617d341d at /rustc/84c257ebe5319ba68ce9a4ce5bca2d89e7127a14/library/std/src/../../backtrace/src/backtrace/libunwind.rs:116:5 1: 0x724bccc77215 - std::backtrace_rs::backtrace::trace_unsynchronized::hd7f004a4c1ba9b08 at /rustc/84c257ebe5319ba68ce9a4ce5bca2d89e7127a14/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5 2: 0x724bccc77215 - std::sys::backtrace::_print_fmt::hc9fcd7a583f53d0e at /rustc/84c257ebe5319ba68ce9a4ce5bca2d89e7127a14/library/std/src/sys/backtrace.rs:68:9 3: 0x724bccc77215 - ::fmt::h0fa110c20a9e6b9b at /rustc/84c257ebe5319ba68ce9a4ce5bca2d89e7127a14/library/std/src/sys/backtrace.rs:41:26 4: 0x724bcccc6c8b - core::fmt::rt::Argument::fmt::h2fa86b20e267917d at /rustc/84c257ebe5319ba68ce9a4ce5bca2d89e7127a14/library/core/src/fmt/rt.rs:173:76 5: 0x724bcccc6c8b - core::fmt::write::hc0abd2b87c9c9f9b at /rustc/84c257ebe5319ba68ce9a4ce5bca2d89e7127a14/library/core/src/fmt/mod.rs:1182:21 6: 0x724bccc6bcef - std::io::Write::write_fmt::h0eab51fe5cc04d2d at /rustc/84c257ebe5319ba68ce9a4ce5bca2d89e7127a14/library/std/src/io/mod.rs:1827:15 7: 0x724bccc79a01 - std::sys::backtrace::BacktraceLock::print::h73f7904e8c6470c5 at /rustc/84c257ebe5319ba68ce9a4ce5bca2d89e7127a14/library/std/src/sys/backtrace.rs:44:9 8: 0x724bccc79a01 - std::panicking::default_hook::{{closure}}::h5772adf9111786bd at /rustc/84c257ebe5319ba68ce9a4ce5bca2d89e7127a14/library/std/src/panicking.rs:269:22 9: 0x724bccc796dc - std::panicking::default_hook::h96e37809c3d46f88 at /rustc/84c257ebe5319ba68ce9a4ce5bca2d89e7127a14/library/std/src/panicking.rs:296:9 10: 0x724bc90255e9 - std[5c22d0894761bf95]::panicking::update_hook::>::{closure#0} 11: 0x724bccc7a3cf - as core::ops::function::Fn>::call::h20dc0ffe6bab5b1c at /rustc/84c257ebe5319ba68ce9a4ce5bca2d89e7127a14/library/alloc/src/boxed.rs:2163:9 12: 0x724bccc7a3cf - std::panicking::rust_panic_with_hook::h8e39c57c8213f108 at /rustc/84c257ebe5319ba68ce9a4ce5bca2d89e7127a14/library/std/src/panicking.rs:808:13 13: 0x724bccc79ff7 - std::panicking::begin_panic_handler::{{closure}}::h3bced104df636721 at /rustc/84c257ebe5319ba68ce9a4ce5bca2d89e7127a14/library/std/src/panicking.rs:674:13 14: 0x724bccc776d9 - std::sys::backtrace::__rust_end_short_backtrace::hd2ecf03e595ba397 at /rustc/84c257ebe5319ba68ce9a4ce5bca2d89e7127a14/library/std/src/sys/backtrace.rs:172:18 15: 0x724bccc79c84 - rust_begin_unwind at /rustc/84c257ebe5319ba68ce9a4ce5bca2d89e7127a14/library/std/src/panicking.rs:665:5 16: 0x724bcccc3243 - core::panicking::panic_fmt::h035bf8637e3dbe4b at /rustc/84c257ebe5319ba68ce9a4ce5bca2d89e7127a14/library/core/src/panicking.rs:74:14 17: 0x724bcccc3437 - core::panicking::panic_bounds_check::h14e13ffb87f2f714 at /rustc/84c257ebe5319ba68ce9a4ce5bca2d89e7127a14/library/core/src/panicking.rs:276:5 18: 0x724bc8c39e3f - ::lower_delegation 19: 0x724bcacf1694 - ::lower_assoc_item 20: 0x724bcace1006 - ::lower_node 21: 0x724bcacddd39 - rustc_ast_lowering[7fcdca43ed366bd6]::lower_to_hir 22: 0x724bcb4eb020 - rustc_query_impl[1c27faad8f8c2359]::plumbing::__rust_begin_short_backtrace::> 23: 0x724bcb4e80c2 - rustc_query_system[e65aa676d33ec03e]::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl[1c27faad8f8c2359]::plumbing::QueryCtxt, false> 24: 0x724bcb4e7d5e - rustc_query_impl[1c27faad8f8c2359]::query_impl::hir_crate::get_query_non_incr::__rust_end_short_backtrace 25: 0x724bcae9f3a4 - rustc_query_impl[1c27faad8f8c2359]::plumbing::__rust_begin_short_backtrace::> 26: 0x724bcae9e95f - rustc_query_system[e65aa676d33ec03e]::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl[1c27faad8f8c2359]::plumbing::QueryCtxt, false> 27: 0x724bcae9e6cf - rustc_query_impl[1c27faad8f8c2359]::query_impl::hir_attrs::get_query_non_incr::__rust_end_short_backtrace 28: 0x724bca83cd86 - ::attrs 29: 0x724bcb5f13c1 - rustc_passes[87d8bc38134e89b]::entry::entry_fn 30: 0x724bcb5f1358 - rustc_query_impl[1c27faad8f8c2359]::plumbing::__rust_begin_short_backtrace::> 31: 0x724bcb5f132f - >::call_once 32: 0x724bcb5f0c48 - rustc_query_system[e65aa676d33ec03e]::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl[1c27faad8f8c2359]::plumbing::QueryCtxt, false> 33: 0x724bcb5f09fd - rustc_query_impl[1c27faad8f8c2359]::query_impl::entry_fn::get_query_non_incr::__rust_end_short_backtrace 34: 0x724bcae76132 - rustc_interface[ca1eba3031847acc]::passes::analysis 35: 0x724bcae75f5b - rustc_query_impl[1c27faad8f8c2359]::plumbing::__rust_begin_short_backtrace::> 36: 0x724bcb4e94e5 - rustc_query_system[e65aa676d33ec03e]::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl[1c27faad8f8c2359]::plumbing::QueryCtxt, false> 37: 0x724bcb4e924f - rustc_query_impl[1c27faad8f8c2359]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace 38: 0x724bcb3e2bc5 - rustc_interface[ca1eba3031847acc]::interface::run_compiler::, rustc_driver_impl[e0a91da34026eb19]::run_compiler::{closure#0}>::{closure#1} 39: 0x724bcb3c8349 - std[5c22d0894761bf95]::sys::backtrace::__rust_begin_short_backtrace::, rustc_driver_impl[e0a91da34026eb19]::run_compiler::{closure#0}>::{closure#1}, core[b11752a00712c889]::result::Result<(), rustc_span[5510ed7e96d6ad1b]::ErrorGuaranteed>>::{closure#0}, core[b11752a00712c889]::result::Result<(), rustc_span[5510ed7e96d6ad1b]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[b11752a00712c889]::result::Result<(), rustc_span[5510ed7e96d6ad1b]::ErrorGuaranteed>> 40: 0x724bcb3c80fa - <::spawn_unchecked_, rustc_driver_impl[e0a91da34026eb19]::run_compiler::{closure#0}>::{closure#1}, core[b11752a00712c889]::result::Result<(), rustc_span[5510ed7e96d6ad1b]::ErrorGuaranteed>>::{closure#0}, core[b11752a00712c889]::result::Result<(), rustc_span[5510ed7e96d6ad1b]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[b11752a00712c889]::result::Result<(), rustc_span[5510ed7e96d6ad1b]::ErrorGuaranteed>>::{closure#1} as core[b11752a00712c889]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0} 41: 0x724bccc8442b - as core::ops::function::FnOnce>::call_once::ha48d6c8806b72121 at /rustc/84c257ebe5319ba68ce9a4ce5bca2d89e7127a14/library/alloc/src/boxed.rs:2149:9 42: 0x724bccc8442b - as core::ops::function::FnOnce>::call_once::heb92897a6cf54248 at /rustc/84c257ebe5319ba68ce9a4ce5bca2d89e7127a14/library/alloc/src/boxed.rs:2149:9 43: 0x724bccc8442b - std::sys::pal::unix::thread::Thread::new::thread_start::hb52b315b33e9d801 at /rustc/84c257ebe5319ba68ce9a4ce5bca2d89e7127a14/library/std/src/sys/pal/unix/thread.rs:108:17 44: 0x724bcca18ded - 45: 0x724bcca9c0dc - 46: 0x0 - 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: please make sure that you have updated to the latest nightly note: rustc 1.82.0-nightly (84c257ebe 2024-07-23) running on x86_64-unknown-linux-gnu query stack during panic: #0 [hir_crate] getting the crate HIR #1 [hir_attrs] getting HIR owner attributes in `` end of query stack error: aborting due to 4 previous errors For more information about this error, try `rustc --explain E0658`. ```

GrigorenkoPV commented 1 month ago

Regressed in #122500