ICE compiling `burn-import`

[Luni-4]

Code

This is a spurious issue, so not reproducible anymore after a cargo clean. Give a try the same, perhaps it could happen again: clone the code contained in this branch https://github.com/Luni-4/burn/tree/add-operator, enter burn-import directory and run cargo build

<code>

Meta

rustc --version --verbose:

rustc 1.71.0 (8ede3aae2 2023-07-12)
binary: rustc
commit-hash: 8ede3aae28fe6e4d52b38157d7bfe0d3bceef225
commit-date: 2023-07-12
host: x86_64-unknown-linux-gnu
release: 1.71.0
LLVM version: 16.0.5

Backtrace

thread 'rustc' panicked at 'assertion failed: `(left == right)`
  left: `78`,
 right: `1002111927320821928687967599834759150`', compiler/rustc_middle/src/query/on_disk_cache.rs:529:5
stack backtrace:
   0:     0x7ff4b5d6a071 - std::backtrace_rs::backtrace::libunwind::trace::h6aeaf83abc038fe6
                               at /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7ff4b5d6a071 - std::backtrace_rs::backtrace::trace_unsynchronized::h4f9875212db0ad97
                               at /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7ff4b5d6a071 - std::sys_common::backtrace::_print_fmt::h3f820027e9c39d3b
                               at /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7ff4b5d6a071 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hded4932df41373b3
                               at /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7ff4b5dc9d9f - core::fmt::rt::Argument::fmt::hc8ead7746b2406d6
                               at /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/library/core/src/fmt/rt.rs:138:9
   5:     0x7ff4b5dc9d9f - core::fmt::write::hb1cb56105a082ad9
                               at /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/library/core/src/fmt/mod.rs:1094:21
   6:     0x7ff4b5d5d271 - std::io::Write::write_fmt::h797fda7085c97e57
                               at /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/library/std/src/io/mod.rs:1713:15
   7:     0x7ff4b5d69e85 - std::sys_common::backtrace::_print::h492d3c92d7400346
                               at /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7ff4b5d69e85 - std::sys_common::backtrace::print::hf74aa2eef05af215
                               at /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7ff4b5d6cb47 - std::panicking::default_hook::{{closure}}::h8cad394227ea3de8
  10:     0x7ff4b5d6c934 - std::panicking::default_hook::h249cc184fec99a8a
                               at /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/library/std/src/panicking.rs:288:9
  11:     0x7ff4b8ee9b5b - rustc_driver_impl[55b27a31f76e3fb7]::install_ice_hook::{closure#0}
  12:     0x7ff4b5d6d28d - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h0be7fc2421582b49
                               at /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/library/alloc/src/boxed.rs:1999:9
  13:     0x7ff4b5d6d28d - std::panicking::rust_panic_with_hook::h82ebcd5d5ed2fad4
                               at /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/library/std/src/panicking.rs:709:13
  14:     0x7ff4b5d6d027 - std::panicking::begin_panic_handler::{{closure}}::h810bed8ecbe66f1a
                               at /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/library/std/src/panicking.rs:597:13
  15:     0x7ff4b5d6a4a6 - std::sys_common::backtrace::__rust_end_short_backtrace::h1410008071796261
                               at /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/library/std/src/sys_common/backtrace.rs:151:18
  16:     0x7ff4b5d6cd72 - rust_begin_unwind
                               at /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/library/std/src/panicking.rs:593:5
  17:     0x7ff4b5dc6023 - core::panicking::panic_fmt::ha0a42a25e0cf258d
                               at /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/library/core/src/panicking.rs:67:14
  18:     0x7ff4b5dc64cb - core::panicking::assert_failed_inner::h8de29b2c8e31440f
  19:     0x7ff4b943a1e2 - core[3d2408b9a7974bb]::panicking::assert_failed::<u128, u128>
  20:     0x7ff4b81da421 - <rustc_middle[69e8a450f04f22d]::query::on_disk_cache::OnDiskCache>::new
  21:     0x7ff4b817530b - rustc_incremental[e6c14406f14ae614]::persist::load::load_query_result_cache
  22:     0x7ff4b81749c2 - rustc_interface[2ac6857faa489841]::passes::create_global_ctxt
  23:     0x7ff4b8173c95 - <rustc_interface[2ac6857faa489841]::queries::Queries>::global_ctxt
  24:     0x7ff4b8171d87 - <rustc_interface[2ac6857faa489841]::interface::Compiler>::enter::<rustc_driver_impl[55b27a31f76e3fb7]::run_compiler::{closure#1}::{closure#2}, core[3d2408b9a7974bb]::result::Result<core[3d2408b9a7974bb]::option::Option<rustc_interface[2ac6857faa489841]::queries::Linker>, rustc_span[b25f563e2e6d20a1]::ErrorGuaranteed>>
  25:     0x7ff4b816f683 - std[a2d7a4c8dd6a1366]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[2ac6857faa489841]::util::run_in_thread_pool_with_globals<rustc_interface[2ac6857faa489841]::interface::run_compiler<core[3d2408b9a7974bb]::result::Result<(), rustc_span[b25f563e2e6d20a1]::ErrorGuaranteed>, rustc_driver_impl[55b27a31f76e3fb7]::run_compiler::{closure#1}>::{closure#0}, core[3d2408b9a7974bb]::result::Result<(), rustc_span[b25f563e2e6d20a1]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[3d2408b9a7974bb]::result::Result<(), rustc_span[b25f563e2e6d20a1]::ErrorGuaranteed>>
  26:     0x7ff4b879b165 - <<std[a2d7a4c8dd6a1366]::thread::Builder>::spawn_unchecked_<rustc_interface[2ac6857faa489841]::util::run_in_thread_pool_with_globals<rustc_interface[2ac6857faa489841]::interface::run_compiler<core[3d2408b9a7974bb]::result::Result<(), rustc_span[b25f563e2e6d20a1]::ErrorGuaranteed>, rustc_driver_impl[55b27a31f76e3fb7]::run_compiler::{closure#1}>::{closure#0}, core[3d2408b9a7974bb]::result::Result<(), rustc_span[b25f563e2e6d20a1]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[3d2408b9a7974bb]::result::Result<(), rustc_span[b25f563e2e6d20a1]::ErrorGuaranteed>>::{closure#1} as core[3d2408b9a7974bb]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  27:     0x7ff4b5d777b5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h9adfc2ae43657457
                               at /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/library/alloc/src/boxed.rs:1985:9
  28:     0x7ff4b5d777b5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h14fefbfa7b574396
                               at /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/library/alloc/src/boxed.rs:1985:9
  29:     0x7ff4b5d777b5 - std::sys::unix::thread::Thread::new::thread_start::ha211bb47f6f5cedc
                               at /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/library/std/src/sys/unix/thread.rs:108:17
  30:     0x7ff4b5a94b43 - start_thread
                               at ./nptl/pthread_create.c:442:8
  31:     0x7ff4b5b26a00 - clone3
                               at ./misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:81
  32:                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 1.71.0 (8ede3aae2 2023-07-12) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type lib -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:
end of query stack
error: could not compile `burn-core` (lib)

[saethlin]

As far as I can tell, the ICE reported in this issue is caused by another process damaging rustc's build artifacts or by a buggy filesystem. That other process could be anything from an IDE running the compiler at the same time as a manual build to a find-and-replace that accidentally edits files in the target directory.

#124686 contains a mitigation for this situation; the compiler now has a crude way to detect and ignore damaged incremental compilation files. You will still get a warning about the damaged file, but the build should proceed normally. That change shipped in Rust 1.80 which released today, so I am closing this issue and a few others which as far as I can tell all have the same root cause. You shouldn't see this ICE anymore, but please file a new issue if you see something like it on 1.80 or later.