thread 'rustc' panicked at compiler/rustc_metadata/src/rmeta/encoder.rs:1888:17

[weiznich]

Code

diesel-rs/diesel@dfeec4b

Clone the repo and, set RUSTFLAGS=-Zsanitizer=address run cargo test --manifest-path diesel_tests/Cargo.toml --no-default-features --features "sqlite libsqlite3-sys libsqlite3-sys/bundled libsqlite3-sys/with-asan" --target x86_64-unknown-linux-gnu to reproduce the ICE

Meta

rustc --version --verbose:

rustc 1.78.0-nightly (98aa3624b 2024-02-08)
binary: rustc
commit-hash: 98aa3624be70462d6a25ed5544333e3df62f4c66
commit-date: 2024-02-08
host: x86_64-unknown-linux-gnu
release: 1.78.0-nightly
LLVM version: 17.0.6

Error output

thread 'rustc' panicked at compiler/rustc_metadata/src/rmeta/encoder.rs:1888:17:
assertion `left == right` failed
  left: crate29
 right: crate28

Backtrace

stack backtrace:
   0:     0x7f6d427f5dd6 - std::backtrace_rs::backtrace::libunwind::trace::hcf4842620364d535
                               at /rustc/98aa3624be70462d6a25ed5544333e3df62f4c66/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
   1:     0x7f6d427f5dd6 - std::backtrace_rs::backtrace::trace_unsynchronized::h615a7d3c4b72d07a
                               at /rustc/98aa3624be70462d6a25ed5544333e3df62f4c66/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f6d427f5dd6 - std::sys_common::backtrace::_print_fmt::h777946980bbce9d4
                               at /rustc/98aa3624be70462d6a25ed5544333e3df62f4c66/library/std/src/sys_common/backtrace.rs:68:5
   3:     0x7f6d427f5dd6 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h0fdadf67cf82c3e5
                               at /rustc/98aa3624be70462d6a25ed5544333e3df62f4c66/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f6d42848830 - core::fmt::rt::Argument::fmt::h40bec717748a6a66
                               at /rustc/98aa3624be70462d6a25ed5544333e3df62f4c66/library/core/src/fmt/rt.rs:142:9
   5:     0x7f6d42848830 - core::fmt::write::hfb3923fb2f513fc0
                               at /rustc/98aa3624be70462d6a25ed5544333e3df62f4c66/library/core/src/fmt/mod.rs:1120:17
   6:     0x7f6d427e964f - std::io::Write::write_fmt::h7dd8ba1b7fdc9479
                               at /rustc/98aa3624be70462d6a25ed5544333e3df62f4c66/library/std/src/io/mod.rs:1854:15
   7:     0x7f6d427f5bb4 - std::sys_common::backtrace::_print::hffce9865d8ccd857
                               at /rustc/98aa3624be70462d6a25ed5544333e3df62f4c66/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7f6d427f5bb4 - std::sys_common::backtrace::print::h532d3566cc4254d4
                               at /rustc/98aa3624be70462d6a25ed5544333e3df62f4c66/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7f6d427f8947 - std::panicking::default_hook::{{closure}}::hfa7000b32c4e888b
  10:     0x7f6d427f86a9 - std::panicking::default_hook::haaf1b4b762fde1ac
                               at /rustc/98aa3624be70462d6a25ed5544333e3df62f4c66/library/std/src/panicking.rs:292:9
  11:     0x7f6d3f33b78c - std[5c40b41967587ec6]::panicking::update_hook::<alloc[5d4b954b8b3d7648]::boxed::Box<rustc_driver_impl[ab5bb327712dbf0b]::install_ice_hook::{closure#0}>>::{closure#0}
  12:     0x7f6d427f9096 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h4c230f69fdc2df31
                               at /rustc/98aa3624be70462d6a25ed5544333e3df62f4c66/library/alloc/src/boxed.rs:2029:9
  13:     0x7f6d427f9096 - std::panicking::rust_panic_with_hook::h89e8d9a00153591c
                               at /rustc/98aa3624be70462d6a25ed5544333e3df62f4c66/library/std/src/panicking.rs:785:13
  14:     0x7f6d427f8de2 - std::panicking::begin_panic_handler::{{closure}}::h0fe7a7a11cf6b670
                               at /rustc/98aa3624be70462d6a25ed5544333e3df62f4c66/library/std/src/panicking.rs:659:13
  15:     0x7f6d427f62d6 - std::sys_common::backtrace::__rust_end_short_backtrace::h5875974741c16bab
                               at /rustc/98aa3624be70462d6a25ed5544333e3df62f4c66/library/std/src/sys_common/backtrace.rs:171:18
  16:     0x7f6d427f8b34 - rust_begin_unwind
                               at /rustc/98aa3624be70462d6a25ed5544333e3df62f4c66/library/std/src/panicking.rs:647:5
  17:     0x7f6d42844f35 - core::panicking::panic_fmt::h58288a9f4ffa83be
                               at /rustc/98aa3624be70462d6a25ed5544333e3df62f4c66/library/core/src/panicking.rs:72:14
  18:     0x7f6d428454cb - core::panicking::assert_failed_inner::h22c9753a230525e4
                               at /rustc/98aa3624be70462d6a25ed5544333e3df62f4c66/library/core/src/panicking.rs:342:17
  19:     0x7f6d3f6e5767 - core[2f2a284c56ca7af5]::panicking::assert_failed::<rustc_span[e69a7bbb34a31e54]::def_id::CrateNum, rustc_span[e69a7bbb34a31e54]::def_id::CrateNum>
  20:     0x7f6d415f9fc2 - <rustc_metadata[c819bf0142ad3cc8]::rmeta::encoder::EncodeContext>::encode_crate_root
  21:     0x7f6d41618f3b - rustc_metadata[c819bf0142ad3cc8]::rmeta::encoder::encode_metadata
  22:     0x7f6d41617568 - rustc_metadata[c819bf0142ad3cc8]::fs::encode_and_write_metadata
  23:     0x7f6d415a0bc3 - rustc_interface[f5c5c4389ec3cf3a]::passes::start_codegen
  24:     0x7f6d415a03b4 - <rustc_interface[f5c5c4389ec3cf3a]::queries::Queries>::codegen_and_build_linker
  25:     0x7f6d4131744c - rustc_interface[f5c5c4389ec3cf3a]::interface::run_compiler::<core[2f2a284c56ca7af5]::result::Result<(), rustc_span[e69a7bbb34a31e54]::ErrorGuaranteed>, rustc_driver_impl[ab5bb327712dbf0b]::run_compiler::{closure#0}>::{closure#0}
  26:     0x7f6d40fa9386 - std[5c40b41967587ec6]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[f5c5c4389ec3cf3a]::util::run_in_thread_with_globals<rustc_interface[f5c5c4389ec3cf3a]::util::run_in_thread_pool_with_globals<rustc_interface[f5c5c4389ec3cf3a]::interface::run_compiler<core[2f2a284c56ca7af5]::result::Result<(), rustc_span[e69a7bbb34a31e54]::ErrorGuaranteed>, rustc_driver_impl[ab5bb327712dbf0b]::run_compiler::{closure#0}>::{closure#0}, core[2f2a284c56ca7af5]::result::Result<(), rustc_span[e69a7bbb34a31e54]::ErrorGuaranteed>>::{closure#0}, core[2f2a284c56ca7af5]::result::Result<(), rustc_span[e69a7bbb34a31e54]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[2f2a284c56ca7af5]::result::Result<(), rustc_span[e69a7bbb34a31e54]::ErrorGuaranteed>>
  27:     0x7f6d40fa91b3 - <<std[5c40b41967587ec6]::thread::Builder>::spawn_unchecked_<rustc_interface[f5c5c4389ec3cf3a]::util::run_in_thread_with_globals<rustc_interface[f5c5c4389ec3cf3a]::util::run_in_thread_pool_with_globals<rustc_interface[f5c5c4389ec3cf3a]::interface::run_compiler<core[2f2a284c56ca7af5]::result::Result<(), rustc_span[e69a7bbb34a31e54]::ErrorGuaranteed>, rustc_driver_impl[ab5bb327712dbf0b]::run_compiler::{closure#0}>::{closure#0}, core[2f2a284c56ca7af5]::result::Result<(), rustc_span[e69a7bbb34a31e54]::ErrorGuaranteed>>::{closure#0}, core[2f2a284c56ca7af5]::result::Result<(), rustc_span[e69a7bbb34a31e54]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[2f2a284c56ca7af5]::result::Result<(), rustc_span[e69a7bbb34a31e54]::ErrorGuaranteed>>::{closure#1} as core[2f2a284c56ca7af5]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  28:     0x7f6d42802735 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hd35908ec403131f0
                               at /rustc/98aa3624be70462d6a25ed5544333e3df62f4c66/library/alloc/src/boxed.rs:2015:9
  29:     0x7f6d42802735 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h6d654616ee0757b9
                               at /rustc/98aa3624be70462d6a25ed5544333e3df62f4c66/library/alloc/src/boxed.rs:2015:9
  30:     0x7f6d42802735 - std::sys::pal::unix::thread::Thread::new::thread_start::h987e3b25a01ed571
                               at /rustc/98aa3624be70462d6a25ed5544333e3df62f4c66/library/std/src/sys/pal/unix/thread.rs:108:17
  31:     0x7f6d425bd897 - start_thread
  32:     0x7f6d4264480c - clone3

  33:                0x0 - <unknown>

rustc-ice-2024-02-09T07_36_46-724311.txt

Running cargo bisect-rustc points to #120767

searched nightlies: from nightly-2024-02-08 to nightly-2024-02-09
regressed nightly: nightly-2024-02-09
searched commit range: 8ace7ea...98aa362
regressed commit: 1280928

bisected with cargo-bisect-rustc v0.6.5

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

RUSTFLAGS=-Zsanitizer=address cargo bisect-rustc --start=2024-02-08 --end=2024-02-09 --with-src -- test --manifest-path diesel_tests/Cargo.toml --no-default-features --features sqlite libsqlite3-sys libsqlite3-sys/bundled libsqlite3-sys/with-asan --target x86_64-unknown-linux-gnu --no-run 

[weiznich]

From looking at the list of PR's in that rollup PR, it might be #119592? So cc @petrochenkov

[matthiaskrgr]

cargo-bisect-rustc v0.6.5

if you update to 0.6.8 you may be able to bisect the specific merge inside the rollup that caused this :)
at least the latest version can do that

[weiznich]

Thanks for letting me know. The new output is:

searched nightlies: from nightly-2024-02-08 to nightly-2024-02-09
regressed nightly: nightly-2024-02-09
searched commit range: 8ace7ea...98aa362
regressed commit: 1280928

bisected with cargo-bisect-rustc v0.6.8

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

cargo bisect-rustc --start=2024-02-08 --end=2024-02-09 --with-src -- test --manifest-path diesel_tests/Cargo.toml --no-default-features --features sqlite libsqlite3-sys libsqlite3-sys/bundled libsqlite3-sys/with-asan --target x86_64-unknown-linux-gnu --no-run 

So yes, that was introduced by #119592

[weiznich]

I just want to leave another note here: Using RUSTFLAGS=-Zsanitizer=address is not necessary. You can reproduce this issue with cargo +nightly test -p diesel_tests --no-default-features -F sqlite in the linked repo