ICE: 'index out of bounds' in on_disk_cache.rs, then double panic 'Illegal read of:'

[kpreid]

This is one of those ICEs that are terribly hard to minimize because they happen randomly and cache-dependently, but hopefully the backtraces will be useful [update: see below for repro instructions]. If nothing else, notice that there is a panic while trying to print the query stack; it might be desirable to look into making that not happen so as to be able to get more information.

Meta

Occurred while running cargo check or cargo clippy.

rustc --version --verbose:

rustc 1.67.1 (d5a82bbd2 2023-02-07)
binary: rustc
commit-hash: d5a82bbd26e1ad8b7401f6a718a9c57c96905483
commit-date: 2023-02-07
host: x86_64-apple-darwin
release: 1.67.1
LLVM version: 15.0.6

Error output

$ /Users/kpreid/.rustup/toolchains/stable-x86_64-apple-darwin/bin/cargo clippy
    Checking all-is-cubes v0.5.0 (/Users/kpreid/Projects/all-is-cubes/all-is-cubes)
warning: glob import doesn't reexport anything because no candidate is public enough
  --> /Users/kpreid/Projects/all-is-cubes/all-is-cubes/src/mesh/chunked_mesh.rs:20:9
   |
20 | pub use blocks::*;
   |         ^^^^^^^^^
   |
   = note: `#[warn(unused_imports)]` on by default

thread 'rustc' panicked at 'index out of bounds: the len is 536 but the index is 667', compiler/rustc_query_impl/src/on_disk_cache.rs:717:40
stack backtrace:
[[[backtrace trimmed; see backtrace section below]]]

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 1.67.1 (d5a82bbd2 2023-02-07) running on x86_64-apple-darwin

note: compiler flags: --crate-type lib -C embed-bitcode=no -C split-debuginfo=unpacked -C debuginfo=2 -C incremental=[REDACTED]

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
thread 'rustc' panicked at 'Illegal read of: 58907', /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/compiler/rustc_query_system/src/dep_graph/graph.rs:450:25
stack backtrace:
[[[backtrace trimmed; see backtrace section below]]]

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 1.67.1 (d5a82bbd2 2023-02-07) running on x86_64-apple-darwin

note: compiler flags: --crate-type lib -C embed-bitcode=no -C split-debuginfo=unpacked -C debuginfo=2 -C incremental=[REDACTED]

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
thread panicked while processing panic. aborting.
warning: `all-is-cubes` (lib) generated 1 warning
error: could not compile `all-is-cubes`; 1 warning emitted

Backtrace

$ /Users/kpreid/.rustup/toolchains/stable-x86_64-apple-darwin/bin/cargo clippy
    Checking all-is-cubes v0.5.0 (/Users/kpreid/Projects/all-is-cubes/all-is-cubes)
warning: glob import doesn't reexport anything because no candidate is public enough
  --> /Users/kpreid/Projects/all-is-cubes/all-is-cubes/src/mesh/chunked_mesh.rs:20:9
   |
20 | pub use blocks::*;
   |         ^^^^^^^^^
   |
   = note: `#[warn(unused_imports)]` on by default

thread 'rustc' panicked at 'index out of bounds: the len is 536 but the index is 667', compiler/rustc_query_impl/src/on_disk_cache.rs:717:40
stack backtrace:
   0:        0x10aaeb796 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hb2b3f9f8dc23cb9d
   1:        0x10ab4a1ea - core::fmt::write::h603bc3f9f076a504
   2:        0x10aaddbbc - std::io::Write::write_fmt::haffd946fd0c71703
   3:        0x10aaeb57a - std::sys_common::backtrace::print::hf660b768f462926e
   4:        0x10aaee8e3 - std::panicking::default_hook::{{closure}}::hb5b3e9f2c6b6790b
   5:        0x10aaee638 - std::panicking::default_hook::ha10903320e35543e
   6:        0x11a3746dd - rustc_driver[8e093e25fe36b41b]::DEFAULT_HOOK::{closure#0}::{closure#0}
   7:        0x10aaef0c7 - std::panicking::rust_panic_with_hook::h52ed83dd7c5d1444
   8:        0x10aaeee74 - std::panicking::begin_panic_handler::{{closure}}::h5f4e10879935eaea
   9:        0x10aaebc38 - std::sys_common::backtrace::__rust_end_short_backtrace::hadc7b677a554f9f9
  10:        0x10aaeeb3d - _rust_begin_unwind
  11:        0x10ab76993 - core::panicking::panic_fmt::hc10ef4c7e7c3da2e
  12:        0x10ab76ad6 - core::panicking::panic_bounds_check::hf660537e54ee196e
  13:        0x11de45ce7 - <rustc_span[2625accf23a29991]::SourceFile>::lines::<<rustc_span[2625accf23a29991]::span_encoding::Span as rustc_serialize[a208a1dcefcb3cbf]::serialize::Decodable<rustc_query_impl[cfd1e86cd19618c3]::on_disk_cache::CacheDecoder>>::decode::{closure#0}, rustc_span[2625accf23a29991]::BytePos>
  14:        0x11dde2841 - <rustc_span[2625accf23a29991]::span_encoding::Span as rustc_serialize[a208a1dcefcb3cbf]::serialize::Decodable<rustc_query_impl[cfd1e86cd19618c3]::on_disk_cache::CacheDecoder>>::decode
  15:        0x11de29509 - <rustc_query_impl[cfd1e86cd19618c3]::on_disk_cache::OnDiskCache>::try_load_query_result::<rustc_span[2625accf23a29991]::span_encoding::Span>
  16:        0x11df80871 - rustc_query_impl[cfd1e86cd19618c3]::plumbing::try_load_from_disk::<rustc_span[2625accf23a29991]::span_encoding::Span>
  17:        0x11dff0946 - <rustc_middle[fc7ebf79883dfa5a]::dep_graph::dep_node::DepKind as rustc_query_system[b885f6fe60382e2e]::dep_graph::DepKind>::with_deps::<rustc_query_system[b885f6fe60382e2e]::query::plumbing::try_load_from_disk_and_cache_in_memory<rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt, rustc_span[2625accf23a29991]::def_id::DefId, core[36719e2ca9cc5cdf]::option::Option<rustc_middle[fc7ebf79883dfa5a]::ty::Destructor>>::{closure#0}, core[36719e2ca9cc5cdf]::option::Option<core[36719e2ca9cc5cdf]::option::Option<rustc_middle[fc7ebf79883dfa5a]::ty::Destructor>>>
  18:        0x11dd0c588 - rustc_query_system[b885f6fe60382e2e]::query::plumbing::try_load_from_disk_and_cache_in_memory::<rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt, rustc_span[2625accf23a29991]::def_id::DefId, rustc_span[2625accf23a29991]::span_encoding::Span>
  19:        0x11dc1a07c - rustc_query_system[b885f6fe60382e2e]::query::plumbing::try_execute_query::<rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt, rustc_query_system[b885f6fe60382e2e]::query::caches::DefaultCache<rustc_span[2625accf23a29991]::def_id::DefId, rustc_span[2625accf23a29991]::span_encoding::Span>>
  20:        0x11dd4a84f - rustc_query_system[b885f6fe60382e2e]::query::plumbing::get_query::<rustc_query_impl[cfd1e86cd19618c3]::queries::def_span, rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt>
  21:        0x11ddd3ba5 - <rustc_query_impl[cfd1e86cd19618c3]::Queries as rustc_middle[fc7ebf79883dfa5a]::ty::query::QueryEngine>::def_span
  22:        0x11cb2cc7d - rustc_ty_utils[2e8d38d334874b81]::ty::param_env
  23:        0x11df2c78e - <rustc_query_system[b885f6fe60382e2e]::dep_graph::graph::DepGraph<rustc_middle[fc7ebf79883dfa5a]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[fc7ebf79883dfa5a]::ty::context::TyCtxt, rustc_span[2625accf23a29991]::def_id::DefId, rustc_middle[fc7ebf79883dfa5a]::ty::ParamEnv>
  24:        0x11dc247cc - rustc_query_system[b885f6fe60382e2e]::query::plumbing::try_execute_query::<rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt, rustc_query_system[b885f6fe60382e2e]::query::caches::DefaultCache<rustc_span[2625accf23a29991]::def_id::DefId, rustc_middle[fc7ebf79883dfa5a]::ty::ParamEnv>>
  25:        0x11dd4bab5 - rustc_query_system[b885f6fe60382e2e]::query::plumbing::get_query::<rustc_query_impl[cfd1e86cd19618c3]::queries::param_env, rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt>
  26:        0x11cc5f854 - <rustc_hir_typeck[6a8d7b4346cd089d]::inherited::InheritedBuilder>::enter::<rustc_hir_typeck[6a8d7b4346cd089d]::typeck_with_fallback<rustc_hir_typeck[6a8d7b4346cd089d]::typeck_const_arg::{closure#0}>::{closure#0}::{closure#1}, &rustc_middle[fc7ebf79883dfa5a]::ty::context::TypeckResults>
  27:        0x11cc85c41 - rustc_hir_typeck[6a8d7b4346cd089d]::typeck_const_arg
  28:        0x11dfed5ba - <rustc_middle[fc7ebf79883dfa5a]::dep_graph::dep_node::DepKind as rustc_query_system[b885f6fe60382e2e]::dep_graph::DepKind>::with_deps::<<rustc_query_system[b885f6fe60382e2e]::dep_graph::graph::DepGraph<rustc_middle[fc7ebf79883dfa5a]::dep_graph::dep_node::DepKind>>::with_task_impl<rustc_middle[fc7ebf79883dfa5a]::ty::context::TyCtxt, (rustc_span[2625accf23a29991]::def_id::LocalDefId, rustc_span[2625accf23a29991]::def_id::DefId), &rustc_middle[fc7ebf79883dfa5a]::ty::context::TypeckResults>::{closure#0}, &rustc_middle[fc7ebf79883dfa5a]::ty::context::TypeckResults>
  29:        0x11df50d42 - <rustc_query_system[b885f6fe60382e2e]::dep_graph::graph::DepGraph<rustc_middle[fc7ebf79883dfa5a]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[fc7ebf79883dfa5a]::ty::context::TyCtxt, (rustc_span[2625accf23a29991]::def_id::LocalDefId, rustc_span[2625accf23a29991]::def_id::DefId), &rustc_middle[fc7ebf79883dfa5a]::ty::context::TypeckResults>
  30:        0x11dc650a1 - rustc_query_system[b885f6fe60382e2e]::query::plumbing::try_execute_query::<rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt, rustc_query_system[b885f6fe60382e2e]::query::caches::DefaultCache<(rustc_span[2625accf23a29991]::def_id::LocalDefId, rustc_span[2625accf23a29991]::def_id::DefId), &rustc_middle[fc7ebf79883dfa5a]::ty::context::TypeckResults>>
  31:        0x11dd3ac7d - rustc_query_system[b885f6fe60382e2e]::query::plumbing::get_query::<rustc_query_impl[cfd1e86cd19618c3]::queries::typeck_const_arg, rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt>
  32:        0x11ddd33e7 - <rustc_query_impl[cfd1e86cd19618c3]::Queries as rustc_middle[fc7ebf79883dfa5a]::ty::query::QueryEngine>::typeck_const_arg
  33:        0x11cc867ba - rustc_hir_typeck[6a8d7b4346cd089d]::typeck
  34:        0x11df1fa2f - <rustc_query_system[b885f6fe60382e2e]::dep_graph::graph::DepGraph<rustc_middle[fc7ebf79883dfa5a]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[fc7ebf79883dfa5a]::ty::context::TyCtxt, rustc_span[2625accf23a29991]::def_id::LocalDefId, &rustc_middle[fc7ebf79883dfa5a]::ty::context::TypeckResults>
  35:        0x11dcb8f0e - rustc_query_system[b885f6fe60382e2e]::query::plumbing::try_execute_query::<rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt, rustc_query_system[b885f6fe60382e2e]::query::caches::VecCache<rustc_span[2625accf23a29991]::def_id::LocalDefId, &rustc_middle[fc7ebf79883dfa5a]::ty::context::TypeckResults>>
  36:        0x11dd4a314 - rustc_query_system[b885f6fe60382e2e]::query::plumbing::get_query::<rustc_query_impl[cfd1e86cd19618c3]::queries::typeck, rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt>
  37:        0x11ccfa49a - std[3161060b00c850ea]::panicking::try::<(), core[36719e2ca9cc5cdf]::panic::unwind_safe::AssertUnwindSafe<rustc_data_structures[5322186b9ea74ad0]::sync::par_for_each_in<&[rustc_span[2625accf23a29991]::def_id::LocalDefId], <rustc_middle[fc7ebf79883dfa5a]::hir::map::Map>::par_body_owners<rustc_hir_typeck[6a8d7b4346cd089d]::typeck_item_bodies::{closure#0}>::{closure#0}>::{closure#0}::{closure#0}>>
  38:        0x11ccfa695 - rustc_data_structures[5322186b9ea74ad0]::sync::par_for_each_in::<&[rustc_span[2625accf23a29991]::def_id::LocalDefId], <rustc_middle[fc7ebf79883dfa5a]::hir::map::Map>::par_body_owners<rustc_hir_typeck[6a8d7b4346cd089d]::typeck_item_bodies::{closure#0}>::{closure#0}>
  39:        0x11cc859cd - rustc_hir_typeck[6a8d7b4346cd089d]::typeck_item_bodies
  40:        0x11df63cf6 - <rustc_query_system[b885f6fe60382e2e]::dep_graph::graph::DepGraph<rustc_middle[fc7ebf79883dfa5a]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[fc7ebf79883dfa5a]::ty::context::TyCtxt, (), ()>
  41:        0x11dc91839 - rustc_query_system[b885f6fe60382e2e]::query::plumbing::try_execute_query::<rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt, rustc_query_system[b885f6fe60382e2e]::query::caches::DefaultCache<(), ()>>
  42:        0x11dd3d191 - rustc_query_system[b885f6fe60382e2e]::query::plumbing::get_query::<rustc_query_impl[cfd1e86cd19618c3]::queries::typeck_item_bodies, rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt>
  43:        0x11cdeadfe - <rustc_session[6d4ac4b3b9abdb4d]::session::Session>::time::<(), rustc_hir_analysis[bf6ee3453ce961c4]::check_crate::{closure#7}>
  44:        0x11ce31435 - rustc_hir_analysis[bf6ee3453ce961c4]::check_crate
  45:        0x11a45348a - rustc_interface[22d5e9ac326097ba]::passes::analysis
  46:        0x11df56b36 - <rustc_query_system[b885f6fe60382e2e]::dep_graph::graph::DepGraph<rustc_middle[fc7ebf79883dfa5a]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[fc7ebf79883dfa5a]::ty::context::TyCtxt, (), core[36719e2ca9cc5cdf]::result::Result<(), rustc_errors[8823badf17c9d4b2]::ErrorGuaranteed>>
  47:        0x11dc802a7 - rustc_query_system[b885f6fe60382e2e]::query::plumbing::try_execute_query::<rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt, rustc_query_system[b885f6fe60382e2e]::query::caches::DefaultCache<(), core[36719e2ca9cc5cdf]::result::Result<(), rustc_errors[8823badf17c9d4b2]::ErrorGuaranteed>>>
  48:        0x11dd4a6f1 - rustc_query_system[b885f6fe60382e2e]::query::plumbing::get_query::<rustc_query_impl[cfd1e86cd19618c3]::queries::analysis, rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt>
  49:        0x11a303ab3 - <rustc_interface[22d5e9ac326097ba]::passes::QueryContext>::enter::<rustc_driver[8e093e25fe36b41b]::run_compiler::{closure#1}::{closure#2}::{closure#2}, core[36719e2ca9cc5cdf]::result::Result<(), rustc_errors[8823badf17c9d4b2]::ErrorGuaranteed>>
  50:        0x11a34ae32 - rustc_span[2625accf23a29991]::with_source_map::<core[36719e2ca9cc5cdf]::result::Result<(), rustc_errors[8823badf17c9d4b2]::ErrorGuaranteed>, rustc_interface[22d5e9ac326097ba]::interface::run_compiler<core[36719e2ca9cc5cdf]::result::Result<(), rustc_errors[8823badf17c9d4b2]::ErrorGuaranteed>, rustc_driver[8e093e25fe36b41b]::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
  51:        0x11a33ce6d - <scoped_tls[b2500c2140549217]::ScopedKey<rustc_span[2625accf23a29991]::SessionGlobals>>::set::<rustc_interface[22d5e9ac326097ba]::interface::run_compiler<core[36719e2ca9cc5cdf]::result::Result<(), rustc_errors[8823badf17c9d4b2]::ErrorGuaranteed>, rustc_driver[8e093e25fe36b41b]::run_compiler::{closure#1}>::{closure#0}, core[36719e2ca9cc5cdf]::result::Result<(), rustc_errors[8823badf17c9d4b2]::ErrorGuaranteed>>
  52:        0x11a30c9aa - std[3161060b00c850ea]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[22d5e9ac326097ba]::util::run_in_thread_pool_with_globals<rustc_interface[22d5e9ac326097ba]::interface::run_compiler<core[36719e2ca9cc5cdf]::result::Result<(), rustc_errors[8823badf17c9d4b2]::ErrorGuaranteed>, rustc_driver[8e093e25fe36b41b]::run_compiler::{closure#1}>::{closure#0}, core[36719e2ca9cc5cdf]::result::Result<(), rustc_errors[8823badf17c9d4b2]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[36719e2ca9cc5cdf]::result::Result<(), rustc_errors[8823badf17c9d4b2]::ErrorGuaranteed>>
  53:        0x11a2eeaf5 - <<std[3161060b00c850ea]::thread::Builder>::spawn_unchecked_<rustc_interface[22d5e9ac326097ba]::util::run_in_thread_pool_with_globals<rustc_interface[22d5e9ac326097ba]::interface::run_compiler<core[36719e2ca9cc5cdf]::result::Result<(), rustc_errors[8823badf17c9d4b2]::ErrorGuaranteed>, rustc_driver[8e093e25fe36b41b]::run_compiler::{closure#1}>::{closure#0}, core[36719e2ca9cc5cdf]::result::Result<(), rustc_errors[8823badf17c9d4b2]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[36719e2ca9cc5cdf]::result::Result<(), rustc_errors[8823badf17c9d4b2]::ErrorGuaranteed>>::{closure#1} as core[36719e2ca9cc5cdf]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  54:        0x10aaf8437 - std::sys::unix::thread::Thread::new::thread_start::he272a3f7edb058e0
  55:     0x7ff80544d4e1 - __pthread_start

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 1.67.1 (d5a82bbd2 2023-02-07) running on x86_64-apple-darwin

note: compiler flags: --crate-type lib -C embed-bitcode=no -C split-debuginfo=unpacked -C debuginfo=2 -C incremental=[REDACTED]

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
thread 'rustc' panicked at 'Illegal read of: 58907', /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/compiler/rustc_query_system/src/dep_graph/graph.rs:450:25
stack backtrace:
   0:        0x10aaeb796 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hb2b3f9f8dc23cb9d
   1:        0x10ab4a1ea - core::fmt::write::h603bc3f9f076a504
   2:        0x10aaddbbc - std::io::Write::write_fmt::haffd946fd0c71703
   3:        0x10aaeb57a - std::sys_common::backtrace::print::hf660b768f462926e
   4:        0x10aaee8e3 - std::panicking::default_hook::{{closure}}::hb5b3e9f2c6b6790b
   5:        0x10aaee638 - std::panicking::default_hook::ha10903320e35543e
   6:        0x11a3746dd - rustc_driver[8e093e25fe36b41b]::DEFAULT_HOOK::{closure#0}::{closure#0}
   7:        0x10aaef0c7 - std::panicking::rust_panic_with_hook::h52ed83dd7c5d1444
   8:        0x10aaeee74 - std::panicking::begin_panic_handler::{{closure}}::h5f4e10879935eaea
   9:        0x10aaebc38 - std::sys_common::backtrace::__rust_end_short_backtrace::hadc7b677a554f9f9
  10:        0x10aaeeb3d - _rust_begin_unwind
  11:        0x10ab76993 - core::panicking::panic_fmt::hc10ef4c7e7c3da2e
  12:        0x11ebfa7c4 - <rustc_middle[fc7ebf79883dfa5a]::dep_graph::dep_node::DepKind as rustc_query_system[b885f6fe60382e2e]::dep_graph::DepKind>::read_deps::<<rustc_query_system[b885f6fe60382e2e]::dep_graph::graph::DepGraph<rustc_middle[fc7ebf79883dfa5a]::dep_graph::dep_node::DepKind>>::read_index::{closure#0}>
  13:        0x11ed22617 - <rustc_middle[fc7ebf79883dfa5a]::ty::context::TyCtxt>::type_length_limit
  14:        0x11ec54a52 - rustc_middle[fc7ebf79883dfa5a]::query::descs::typeck
  15:        0x11df79313 - rustc_query_impl[cfd1e86cd19618c3]::plumbing::create_query_frame::<rustc_span[2625accf23a29991]::def_id::LocalDefId>
  16:        0x11dec3165 - <rustc_query_impl[cfd1e86cd19618c3]::query_structs::typeck::{closure#0} as core[36719e2ca9cc5cdf]::ops::function::FnOnce<(rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt, &mut std[3161060b00c850ea]::collections::hash::map::HashMap<rustc_query_system[b885f6fe60382e2e]::query::job::QueryJobId, rustc_query_system[b885f6fe60382e2e]::query::job::QueryJobInfo, core[36719e2ca9cc5cdf]::hash::BuildHasherDefault<rustc_hash[7147e8159724e841]::FxHasher>>)>>::call_once
  17:        0x11de56f5d - rustc_query_system[b885f6fe60382e2e]::query::job::print_query_stack::<rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt>
  18:        0x11a3fb583 - rustc_interface[22d5e9ac326097ba]::interface::try_print_query_stack
  19:        0x11a375491 - rustc_driver[8e093e25fe36b41b]::report_ice
  20:        0x10aaef0c7 - std::panicking::rust_panic_with_hook::h52ed83dd7c5d1444
  21:        0x10aaeee74 - std::panicking::begin_panic_handler::{{closure}}::h5f4e10879935eaea
  22:        0x10aaebc38 - std::sys_common::backtrace::__rust_end_short_backtrace::hadc7b677a554f9f9
  23:        0x10aaeeb3d - _rust_begin_unwind
  24:        0x10ab76993 - core::panicking::panic_fmt::hc10ef4c7e7c3da2e
  25:        0x10ab76ad6 - core::panicking::panic_bounds_check::hf660537e54ee196e
  26:        0x11de45ce7 - <rustc_span[2625accf23a29991]::SourceFile>::lines::<<rustc_span[2625accf23a29991]::span_encoding::Span as rustc_serialize[a208a1dcefcb3cbf]::serialize::Decodable<rustc_query_impl[cfd1e86cd19618c3]::on_disk_cache::CacheDecoder>>::decode::{closure#0}, rustc_span[2625accf23a29991]::BytePos>
  27:        0x11dde2841 - <rustc_span[2625accf23a29991]::span_encoding::Span as rustc_serialize[a208a1dcefcb3cbf]::serialize::Decodable<rustc_query_impl[cfd1e86cd19618c3]::on_disk_cache::CacheDecoder>>::decode
  28:        0x11de29509 - <rustc_query_impl[cfd1e86cd19618c3]::on_disk_cache::OnDiskCache>::try_load_query_result::<rustc_span[2625accf23a29991]::span_encoding::Span>
  29:        0x11df80871 - rustc_query_impl[cfd1e86cd19618c3]::plumbing::try_load_from_disk::<rustc_span[2625accf23a29991]::span_encoding::Span>
  30:        0x11dff0946 - <rustc_middle[fc7ebf79883dfa5a]::dep_graph::dep_node::DepKind as rustc_query_system[b885f6fe60382e2e]::dep_graph::DepKind>::with_deps::<rustc_query_system[b885f6fe60382e2e]::query::plumbing::try_load_from_disk_and_cache_in_memory<rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt, rustc_span[2625accf23a29991]::def_id::DefId, core[36719e2ca9cc5cdf]::option::Option<rustc_middle[fc7ebf79883dfa5a]::ty::Destructor>>::{closure#0}, core[36719e2ca9cc5cdf]::option::Option<core[36719e2ca9cc5cdf]::option::Option<rustc_middle[fc7ebf79883dfa5a]::ty::Destructor>>>
  31:        0x11dd0c588 - rustc_query_system[b885f6fe60382e2e]::query::plumbing::try_load_from_disk_and_cache_in_memory::<rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt, rustc_span[2625accf23a29991]::def_id::DefId, rustc_span[2625accf23a29991]::span_encoding::Span>
  32:        0x11dc1a07c - rustc_query_system[b885f6fe60382e2e]::query::plumbing::try_execute_query::<rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt, rustc_query_system[b885f6fe60382e2e]::query::caches::DefaultCache<rustc_span[2625accf23a29991]::def_id::DefId, rustc_span[2625accf23a29991]::span_encoding::Span>>
  33:        0x11dd4a84f - rustc_query_system[b885f6fe60382e2e]::query::plumbing::get_query::<rustc_query_impl[cfd1e86cd19618c3]::queries::def_span, rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt>
  34:        0x11ddd3ba5 - <rustc_query_impl[cfd1e86cd19618c3]::Queries as rustc_middle[fc7ebf79883dfa5a]::ty::query::QueryEngine>::def_span
  35:        0x11cb2cc7d - rustc_ty_utils[2e8d38d334874b81]::ty::param_env
  36:        0x11df2c78e - <rustc_query_system[b885f6fe60382e2e]::dep_graph::graph::DepGraph<rustc_middle[fc7ebf79883dfa5a]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[fc7ebf79883dfa5a]::ty::context::TyCtxt, rustc_span[2625accf23a29991]::def_id::DefId, rustc_middle[fc7ebf79883dfa5a]::ty::ParamEnv>
  37:        0x11dc247cc - rustc_query_system[b885f6fe60382e2e]::query::plumbing::try_execute_query::<rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt, rustc_query_system[b885f6fe60382e2e]::query::caches::DefaultCache<rustc_span[2625accf23a29991]::def_id::DefId, rustc_middle[fc7ebf79883dfa5a]::ty::ParamEnv>>
  38:        0x11dd4bab5 - rustc_query_system[b885f6fe60382e2e]::query::plumbing::get_query::<rustc_query_impl[cfd1e86cd19618c3]::queries::param_env, rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt>
  39:        0x11cc5f854 - <rustc_hir_typeck[6a8d7b4346cd089d]::inherited::InheritedBuilder>::enter::<rustc_hir_typeck[6a8d7b4346cd089d]::typeck_with_fallback<rustc_hir_typeck[6a8d7b4346cd089d]::typeck_const_arg::{closure#0}>::{closure#0}::{closure#1}, &rustc_middle[fc7ebf79883dfa5a]::ty::context::TypeckResults>
  40:        0x11cc85c41 - rustc_hir_typeck[6a8d7b4346cd089d]::typeck_const_arg
  41:        0x11dfed5ba - <rustc_middle[fc7ebf79883dfa5a]::dep_graph::dep_node::DepKind as rustc_query_system[b885f6fe60382e2e]::dep_graph::DepKind>::with_deps::<<rustc_query_system[b885f6fe60382e2e]::dep_graph::graph::DepGraph<rustc_middle[fc7ebf79883dfa5a]::dep_graph::dep_node::DepKind>>::with_task_impl<rustc_middle[fc7ebf79883dfa5a]::ty::context::TyCtxt, (rustc_span[2625accf23a29991]::def_id::LocalDefId, rustc_span[2625accf23a29991]::def_id::DefId), &rustc_middle[fc7ebf79883dfa5a]::ty::context::TypeckResults>::{closure#0}, &rustc_middle[fc7ebf79883dfa5a]::ty::context::TypeckResults>
  42:        0x11df50d42 - <rustc_query_system[b885f6fe60382e2e]::dep_graph::graph::DepGraph<rustc_middle[fc7ebf79883dfa5a]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[fc7ebf79883dfa5a]::ty::context::TyCtxt, (rustc_span[2625accf23a29991]::def_id::LocalDefId, rustc_span[2625accf23a29991]::def_id::DefId), &rustc_middle[fc7ebf79883dfa5a]::ty::context::TypeckResults>
  43:        0x11dc650a1 - rustc_query_system[b885f6fe60382e2e]::query::plumbing::try_execute_query::<rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt, rustc_query_system[b885f6fe60382e2e]::query::caches::DefaultCache<(rustc_span[2625accf23a29991]::def_id::LocalDefId, rustc_span[2625accf23a29991]::def_id::DefId), &rustc_middle[fc7ebf79883dfa5a]::ty::context::TypeckResults>>
  44:        0x11dd3ac7d - rustc_query_system[b885f6fe60382e2e]::query::plumbing::get_query::<rustc_query_impl[cfd1e86cd19618c3]::queries::typeck_const_arg, rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt>
  45:        0x11ddd33e7 - <rustc_query_impl[cfd1e86cd19618c3]::Queries as rustc_middle[fc7ebf79883dfa5a]::ty::query::QueryEngine>::typeck_const_arg
  46:        0x11cc867ba - rustc_hir_typeck[6a8d7b4346cd089d]::typeck
  47:        0x11df1fa2f - <rustc_query_system[b885f6fe60382e2e]::dep_graph::graph::DepGraph<rustc_middle[fc7ebf79883dfa5a]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[fc7ebf79883dfa5a]::ty::context::TyCtxt, rustc_span[2625accf23a29991]::def_id::LocalDefId, &rustc_middle[fc7ebf79883dfa5a]::ty::context::TypeckResults>
  48:        0x11dcb8f0e - rustc_query_system[b885f6fe60382e2e]::query::plumbing::try_execute_query::<rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt, rustc_query_system[b885f6fe60382e2e]::query::caches::VecCache<rustc_span[2625accf23a29991]::def_id::LocalDefId, &rustc_middle[fc7ebf79883dfa5a]::ty::context::TypeckResults>>
  49:        0x11dd4a314 - rustc_query_system[b885f6fe60382e2e]::query::plumbing::get_query::<rustc_query_impl[cfd1e86cd19618c3]::queries::typeck, rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt>
  50:        0x11ccfa49a - std[3161060b00c850ea]::panicking::try::<(), core[36719e2ca9cc5cdf]::panic::unwind_safe::AssertUnwindSafe<rustc_data_structures[5322186b9ea74ad0]::sync::par_for_each_in<&[rustc_span[2625accf23a29991]::def_id::LocalDefId], <rustc_middle[fc7ebf79883dfa5a]::hir::map::Map>::par_body_owners<rustc_hir_typeck[6a8d7b4346cd089d]::typeck_item_bodies::{closure#0}>::{closure#0}>::{closure#0}::{closure#0}>>
  51:        0x11ccfa695 - rustc_data_structures[5322186b9ea74ad0]::sync::par_for_each_in::<&[rustc_span[2625accf23a29991]::def_id::LocalDefId], <rustc_middle[fc7ebf79883dfa5a]::hir::map::Map>::par_body_owners<rustc_hir_typeck[6a8d7b4346cd089d]::typeck_item_bodies::{closure#0}>::{closure#0}>
  52:        0x11cc859cd - rustc_hir_typeck[6a8d7b4346cd089d]::typeck_item_bodies
  53:        0x11df63cf6 - <rustc_query_system[b885f6fe60382e2e]::dep_graph::graph::DepGraph<rustc_middle[fc7ebf79883dfa5a]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[fc7ebf79883dfa5a]::ty::context::TyCtxt, (), ()>
  54:        0x11dc91839 - rustc_query_system[b885f6fe60382e2e]::query::plumbing::try_execute_query::<rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt, rustc_query_system[b885f6fe60382e2e]::query::caches::DefaultCache<(), ()>>
  55:        0x11dd3d191 - rustc_query_system[b885f6fe60382e2e]::query::plumbing::get_query::<rustc_query_impl[cfd1e86cd19618c3]::queries::typeck_item_bodies, rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt>
  56:        0x11cdeadfe - <rustc_session[6d4ac4b3b9abdb4d]::session::Session>::time::<(), rustc_hir_analysis[bf6ee3453ce961c4]::check_crate::{closure#7}>
  57:        0x11ce31435 - rustc_hir_analysis[bf6ee3453ce961c4]::check_crate
  58:        0x11a45348a - rustc_interface[22d5e9ac326097ba]::passes::analysis
  59:        0x11df56b36 - <rustc_query_system[b885f6fe60382e2e]::dep_graph::graph::DepGraph<rustc_middle[fc7ebf79883dfa5a]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[fc7ebf79883dfa5a]::ty::context::TyCtxt, (), core[36719e2ca9cc5cdf]::result::Result<(), rustc_errors[8823badf17c9d4b2]::ErrorGuaranteed>>
  60:        0x11dc802a7 - rustc_query_system[b885f6fe60382e2e]::query::plumbing::try_execute_query::<rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt, rustc_query_system[b885f6fe60382e2e]::query::caches::DefaultCache<(), core[36719e2ca9cc5cdf]::result::Result<(), rustc_errors[8823badf17c9d4b2]::ErrorGuaranteed>>>
  61:        0x11dd4a6f1 - rustc_query_system[b885f6fe60382e2e]::query::plumbing::get_query::<rustc_query_impl[cfd1e86cd19618c3]::queries::analysis, rustc_query_impl[cfd1e86cd19618c3]::plumbing::QueryCtxt>
  62:        0x11a303ab3 - <rustc_interface[22d5e9ac326097ba]::passes::QueryContext>::enter::<rustc_driver[8e093e25fe36b41b]::run_compiler::{closure#1}::{closure#2}::{closure#2}, core[36719e2ca9cc5cdf]::result::Result<(), rustc_errors[8823badf17c9d4b2]::ErrorGuaranteed>>
  63:        0x11a34ae32 - rustc_span[2625accf23a29991]::with_source_map::<core[36719e2ca9cc5cdf]::result::Result<(), rustc_errors[8823badf17c9d4b2]::ErrorGuaranteed>, rustc_interface[22d5e9ac326097ba]::interface::run_compiler<core[36719e2ca9cc5cdf]::result::Result<(), rustc_errors[8823badf17c9d4b2]::ErrorGuaranteed>, rustc_driver[8e093e25fe36b41b]::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
  64:        0x11a33ce6d - <scoped_tls[b2500c2140549217]::ScopedKey<rustc_span[2625accf23a29991]::SessionGlobals>>::set::<rustc_interface[22d5e9ac326097ba]::interface::run_compiler<core[36719e2ca9cc5cdf]::result::Result<(), rustc_errors[8823badf17c9d4b2]::ErrorGuaranteed>, rustc_driver[8e093e25fe36b41b]::run_compiler::{closure#1}>::{closure#0}, core[36719e2ca9cc5cdf]::result::Result<(), rustc_errors[8823badf17c9d4b2]::ErrorGuaranteed>>
  65:        0x11a30c9aa - std[3161060b00c850ea]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[22d5e9ac326097ba]::util::run_in_thread_pool_with_globals<rustc_interface[22d5e9ac326097ba]::interface::run_compiler<core[36719e2ca9cc5cdf]::result::Result<(), rustc_errors[8823badf17c9d4b2]::ErrorGuaranteed>, rustc_driver[8e093e25fe36b41b]::run_compiler::{closure#1}>::{closure#0}, core[36719e2ca9cc5cdf]::result::Result<(), rustc_errors[8823badf17c9d4b2]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[36719e2ca9cc5cdf]::result::Result<(), rustc_errors[8823badf17c9d4b2]::ErrorGuaranteed>>
  66:        0x11a2eeaf5 - <<std[3161060b00c850ea]::thread::Builder>::spawn_unchecked_<rustc_interface[22d5e9ac326097ba]::util::run_in_thread_pool_with_globals<rustc_interface[22d5e9ac326097ba]::interface::run_compiler<core[36719e2ca9cc5cdf]::result::Result<(), rustc_errors[8823badf17c9d4b2]::ErrorGuaranteed>, rustc_driver[8e093e25fe36b41b]::run_compiler::{closure#1}>::{closure#0}, core[36719e2ca9cc5cdf]::result::Result<(), rustc_errors[8823badf17c9d4b2]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[36719e2ca9cc5cdf]::result::Result<(), rustc_errors[8823badf17c9d4b2]::ErrorGuaranteed>>::{closure#1} as core[36719e2ca9cc5cdf]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  67:        0x10aaf8437 - std::sys::unix::thread::Thread::new::thread_start::he272a3f7edb058e0
  68:     0x7ff80544d4e1 - __pthread_start

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 1.67.1 (d5a82bbd2 2023-02-07) running on x86_64-apple-darwin

note: compiler flags: --crate-type lib -C embed-bitcode=no -C split-debuginfo=unpacked -C debuginfo=2 -C incremental=[REDACTED]

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
thread panicked while processing panic. aborting.
warning: `all-is-cubes` (lib) generated 1 warning
error: could not compile `all-is-cubes`; 1 warning emitted

@rustbot label +A-incr-comp

[kpreid]

On looking more closely at the backtrace, it seems that this error results from attempting to load corrupted (truncated) query cache files, and therefore it would be valuable to obtain a trace from the file having been written (assuming that they are truncated due to a panic during write; if they're silently corrupted that's even harder to notice).

I will update this issue if I manage to catch such a case.

[kpreid]

Looking at the first panic observed since a cargo clean and it is still the above index out of bounds in <Span as Decodable>::decode, so it's not that I missed the writing event but that it didn't panic.

[kpreid]

I have made some progress on reproducing the problem with a minimal incremental change (but not yet a minimal standalone code sample), and @Nilstrieb expressed some interest in looking at the problem, so I've published branches with the work I have so far. Repro steps:

1. Checkout https://github.com/kpreid/all-is-cubes/tree/ice-base
2. cargo clean -p all-is-cubes
3. cargo build -p all-is-cubes
4. Checkout https://github.com/kpreid/all-is-cubes/tree/ice-reduce
5. cargo build -p all-is-cubes

The second build will ICE.

The differences between the two branches are shuffling code between modules, adding a module, and deleting a module; the code in them is as identical as it can be.

[Noratrieb]

Note: I cannot reproduce this ICE on x86_64-unknown-linux-gnu with the latest nightly by default, but -Zincremental-verify-ich makes it ICE.

backtrace

error: internal compiler error: encountered incremental compilation error with def_span(all_is_cubes[1daa]::mesh::chunked_mesh::{impl#6}::{constant#0})
  |
  = help: This is a known issue with the compiler. Run `cargo clean -p all_is_cubes` or `cargo clean` to allow your project to compile
  = note: Please follow the instructions below to create a bug report with the provided information
  = note: See <https://github.com/rust-lang/rust/issues/84970> for more information

thread 'rustc' panicked at 'Found unstable fingerprints for ErrorGuaranteed(()): all-is-cubes/src/mesh/chunked_mesh.rs:40:71: 41:5 (#0)', /rustc/db0cbc48d4aaa300713a95d9b317a365a474490c/compiler/rustc_query_system/src/query/plumbing.rs:711:9
stack backtrace:
   0:     0x7f307ba99baa - std::backtrace_rs::backtrace::libunwind::trace::h9d4d46a1241d4149
                               at /rustc/db0cbc48d4aaa300713a95d9b317a365a474490c/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7f307ba99baa - std::backtrace_rs::backtrace::trace_unsynchronized::h1d977e0ccdc95d1a
                               at /rustc/db0cbc48d4aaa300713a95d9b317a365a474490c/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f307ba99baa - std::sys_common::backtrace::_print_fmt::h2f16d6748c69c3cb
                               at /rustc/db0cbc48d4aaa300713a95d9b317a365a474490c/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7f307ba99baa - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h23aff7f8c54e6645
                               at /rustc/db0cbc48d4aaa300713a95d9b317a365a474490c/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f307bafdb4f - core::fmt::write::h79726c2a902099f4
                               at /rustc/db0cbc48d4aaa300713a95d9b317a365a474490c/library/core/src/fmt/mod.rs:1254:17
   5:     0x7f307ba8c7e5 - std::io::Write::write_fmt::h95eedad6917eaf86
                               at /rustc/db0cbc48d4aaa300713a95d9b317a365a474490c/library/std/src/io/mod.rs:1698:15
   6:     0x7f307ba99975 - std::sys_common::backtrace::_print::h24fa32acab53acd8
                               at /rustc/db0cbc48d4aaa300713a95d9b317a365a474490c/library/std/src/sys_common/backtrace.rs:47:5
   7:     0x7f307ba99975 - std::sys_common::backtrace::print::h94b47d816d0ea14c
                               at /rustc/db0cbc48d4aaa300713a95d9b317a365a474490c/library/std/src/sys_common/backtrace.rs:34:9
   8:     0x7f307ba9c61e - std::panicking::default_hook::{{closure}}::h3bfad4b8b9ac0389
                               at /rustc/db0cbc48d4aaa300713a95d9b317a365a474490c/library/std/src/panicking.rs:271:22
   9:     0x7f307ba9c3c5 - std::panicking::default_hook::hd7b308d8bc779cf9
                               at /rustc/db0cbc48d4aaa300713a95d9b317a365a474490c/library/std/src/panicking.rs:290:9
  10:     0x7f307ed41e85 - <rustc_driver_impl[2b818a379abe8476]::DEFAULT_HOOK::{closure#0}::{closure#0} as core[4ada38e0d5cae8be]::ops::function::FnOnce<(&core[4ada38e0d5cae8be]::panic::panic_info::PanicInfo,)>>::call_once::{shim:vtable#0}
  11:     0x7f307ba9ce14 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hca7afd504fdadbfc
                               at /rustc/db0cbc48d4aaa300713a95d9b317a365a474490c/library/alloc/src/boxed.rs:2002:9
  12:     0x7f307ba9ce14 - std::panicking::rust_panic_with_hook::hcec224f40e508f49
                               at /rustc/db0cbc48d4aaa300713a95d9b317a365a474490c/library/std/src/panicking.rs:696:13
  13:     0x7f307ba9cb89 - std::panicking::begin_panic_handler::{{closure}}::habd506011d7d1786
                               at /rustc/db0cbc48d4aaa300713a95d9b317a365a474490c/library/std/src/panicking.rs:583:13
  14:     0x7f307ba9a016 - std::sys_common::backtrace::__rust_end_short_backtrace::h85b86f25ce9045f3
                               at /rustc/db0cbc48d4aaa300713a95d9b317a365a474490c/library/std/src/sys_common/backtrace.rs:150:18
  15:     0x7f307ba9c8e2 - rust_begin_unwind
                               at /rustc/db0cbc48d4aaa300713a95d9b317a365a474490c/library/std/src/panicking.rs:579:5
  16:     0x7f307baf9f53 - core::panicking::panic_fmt::hb2cfa4c0db12cc76
                               at /rustc/db0cbc48d4aaa300713a95d9b317a365a474490c/library/core/src/panicking.rs:67:14
  17:     0x7f307f5e0770 - rustc_query_system[131b14eb042ddf12]::query::plumbing::incremental_verify_ich_failed::<rustc_middle[344b7a5778ebfb41]::ty::context::TyCtxt>
  18:     0x7f307d56ced6 - rustc_query_system[131b14eb042ddf12]::query::plumbing::try_execute_query::<rustc_query_impl[11434efd0e0628d5]::queries::def_span, rustc_query_impl[11434efd0e0628d5]::plumbing::QueryCtxt>
  19:     0x7f307ccf82f6 - rustc_ty_utils[354017f06c94058c]::ty::param_env
  20:     0x7f307ccf6288 - rustc_query_system[131b14eb042ddf12]::query::plumbing::try_execute_query::<rustc_query_impl[11434efd0e0628d5]::queries::param_env, rustc_query_impl[11434efd0e0628d5]::plumbing::QueryCtxt>
  21:     0x7f307ccf5906 - <rustc_query_impl[11434efd0e0628d5]::Queries as rustc_middle[344b7a5778ebfb41]::ty::query::QueryEngine>::param_env
  22:     0x7f307e2b2040 - rustc_hir_typeck[66b9761b95fd1136]::typeck_const_arg
  23:     0x7f307e1989b8 - rustc_query_system[131b14eb042ddf12]::query::plumbing::try_execute_query::<rustc_query_impl[11434efd0e0628d5]::queries::typeck_const_arg, rustc_query_impl[11434efd0e0628d5]::plumbing::QueryCtxt>
  24:     0x7f307e1982e4 - <rustc_query_impl[11434efd0e0628d5]::Queries as rustc_middle[344b7a5778ebfb41]::ty::query::QueryEngine>::typeck_const_arg
  25:     0x7f307dde3d53 - rustc_hir_typeck[66b9761b95fd1136]::typeck
  26:     0x7f307dbcd79b - rustc_query_system[131b14eb042ddf12]::query::plumbing::try_execute_query::<rustc_query_impl[11434efd0e0628d5]::queries::typeck, rustc_query_impl[11434efd0e0628d5]::plumbing::QueryCtxt>
  27:     0x7f307e49e14b - rustc_data_structures[3749598f95b8ed78]::sync::par_for_each_in::<&[rustc_span[d779338a88541528]::def_id::LocalDefId], <rustc_middle[344b7a5778ebfb41]::hir::map::Map>::par_body_owners<rustc_hir_typeck[66b9761b95fd1136]::typeck_item_bodies::{closure#0}>::{closure#0}>
  28:     0x7f307e49df1f - rustc_hir_typeck[66b9761b95fd1136]::typeck_item_bodies
  29:     0x7f307e50e2fd - rustc_query_system[131b14eb042ddf12]::query::plumbing::try_execute_query::<rustc_query_impl[11434efd0e0628d5]::queries::typeck_item_bodies, rustc_query_impl[11434efd0e0628d5]::plumbing::QueryCtxt>
  30:     0x7f307e50dd5c - <rustc_query_impl[11434efd0e0628d5]::Queries as rustc_middle[344b7a5778ebfb41]::ty::query::QueryEngine>::typeck_item_bodies
  31:     0x7f307e1e591f - <rustc_session[53edf0328176f526]::session::Session>::time::<(), rustc_hir_analysis[1b62eb4aa9e52db3]::check_crate::{closure#7}>
  32:     0x7f307e1e22c7 - rustc_hir_analysis[1b62eb4aa9e52db3]::check_crate
  33:     0x7f307e1dc511 - rustc_interface[cc30d76fa8dae5fc]::passes::analysis
  34:     0x7f307e505810 - rustc_query_system[131b14eb042ddf12]::query::plumbing::try_execute_query::<rustc_query_impl[11434efd0e0628d5]::queries::analysis, rustc_query_impl[11434efd0e0628d5]::plumbing::QueryCtxt>
  35:     0x7f307e5052f0 - <rustc_query_impl[11434efd0e0628d5]::Queries as rustc_middle[344b7a5778ebfb41]::ty::query::QueryEngine>::analysis
  36:     0x7f307e389089 - <rustc_middle[344b7a5778ebfb41]::ty::context::GlobalCtxt>::enter::<rustc_driver_impl[2b818a379abe8476]::run_compiler::{closure#1}::{closure#2}::{closure#4}, core[4ada38e0d5cae8be]::result::Result<(), rustc_span[d779338a88541528]::ErrorGuaranteed>>
  37:     0x7f307deb1e01 - <rustc_interface[cc30d76fa8dae5fc]::interface::Compiler>::enter::<rustc_driver_impl[2b818a379abe8476]::run_compiler::{closure#1}::{closure#2}, core[4ada38e0d5cae8be]::result::Result<core[4ada38e0d5cae8be]::option::Option<rustc_interface[cc30d76fa8dae5fc]::queries::Linker>, rustc_span[d779338a88541528]::ErrorGuaranteed>>
  38:     0x7f307deaffb1 - rustc_span[d779338a88541528]::with_source_map::<core[4ada38e0d5cae8be]::result::Result<(), rustc_span[d779338a88541528]::ErrorGuaranteed>, rustc_interface[cc30d76fa8dae5fc]::interface::run_compiler<core[4ada38e0d5cae8be]::result::Result<(), rustc_span[d779338a88541528]::ErrorGuaranteed>, rustc_driver_impl[2b818a379abe8476]::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
  39:     0x7f307deaf55f - std[d743b6fa88cd7a4c]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[cc30d76fa8dae5fc]::util::run_in_thread_pool_with_globals<rustc_interface[cc30d76fa8dae5fc]::interface::run_compiler<core[4ada38e0d5cae8be]::result::Result<(), rustc_span[d779338a88541528]::ErrorGuaranteed>, rustc_driver_impl[2b818a379abe8476]::run_compiler::{closure#1}>::{closure#0}, core[4ada38e0d5cae8be]::result::Result<(), rustc_span[d779338a88541528]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[4ada38e0d5cae8be]::result::Result<(), rustc_span[d779338a88541528]::ErrorGuaranteed>>
  40:     0x7f307e5ea52e - <<std[d743b6fa88cd7a4c]::thread::Builder>::spawn_unchecked_<rustc_interface[cc30d76fa8dae5fc]::util::run_in_thread_pool_with_globals<rustc_interface[cc30d76fa8dae5fc]::interface::run_compiler<core[4ada38e0d5cae8be]::result::Result<(), rustc_span[d779338a88541528]::ErrorGuaranteed>, rustc_driver_impl[2b818a379abe8476]::run_compiler::{closure#1}>::{closure#0}, core[4ada38e0d5cae8be]::result::Result<(), rustc_span[d779338a88541528]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[4ada38e0d5cae8be]::result::Result<(), rustc_span[d779338a88541528]::ErrorGuaranteed>>::{closure#1} as core[4ada38e0d5cae8be]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  41:     0x7f307baa6f15 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h843c8319f93d5fbd
                               at /rustc/db0cbc48d4aaa300713a95d9b317a365a474490c/library/alloc/src/boxed.rs:1988:9
  42:     0x7f307baa6f15 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h9f6cdb354bbcea1a
                               at /rustc/db0cbc48d4aaa300713a95d9b317a365a474490c/library/alloc/src/boxed.rs:1988:9
  43:     0x7f307baa6f15 - std::sys::unix::thread::Thread::new::thread_start::h53e32c182a23b75f
                               at /rustc/db0cbc48d4aaa300713a95d9b317a365a474490c/library/std/src/sys/unix/thread.rs:108:17
  44:     0x7f307b7e9b43 - start_thread
                               at ./nptl/./nptl/pthread_create.c:442:8
  45:     0x7f307b87ba00 - clone3
                               at ./misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:81
  46:                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 1.70.0-nightly (db0cbc48d 2023-03-26) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type lib -C opt-level=2 -C embed-bitcode=no -C debuginfo=2 -C debug-assertions=on -C linker=clang -C incremental=[REDACTED] -Z incremental-verify-ich=yes

note: some of the compiler flags provided by cargo are hidden

query stack during panic:

[Noratrieb]

I've created a new branch which slighly simplifies the diff application: https://github.com/Nilstrieb/all-is-cubes/tree/try (bb8f36b at the time of writing).

[michaelwoerister]

I've tried to find out a bit more about this, but didn't get very far. From what I can tell:

• In the second session all_is_cubes[1daa]::mesh::chunked_mesh::{impl#6} refers to the derived Debug impl for ChunkedSpaceMesh. And all_is_cubes[1daa]::mesh::chunked_mesh::{impl#6}::{constant#0} refers to the CHUNK_SIZE const generic of that impl. It has the span of the CHUNK_SIZE const generic of the ChunkedSpaceMesh type definition.
• In the first session, as far as I can tell, the def-path all_is_cubes[1daa]::mesh::chunked_mesh::{impl#6} refers to the inherent impl of TodoListener, which also has a CHUNK_SIZE generic const.

The def_span(all_is_cubes[1daa]::mesh::chunked_mesh::{impl#6}::{constant#0}) query should not evaluate to green, but for some reason all of its dependencies are marked as green.

[michaelwoerister]

Maybe -Zdump-dep-graph is too broken (it needed some fixing to show more than just DepKinds), but is it possible that def_span(all_is_cubes[1daa]::mesh::chunked_mesh::{impl#6}::{constant#0}) has no dependencies at all during the first session?

[michaelwoerister]

It does indeed have no dependencies. I imagine that this is the culprit:

rust/compiler/rustc_query_system/src/dep_graph/graph.rs

Line 559 in 6066037

TaskDepsRef::Ignore => {} // During HIR lowering, we have no dependencies.

I'm not really up-to-date with query feeding but this looks fishy. When a dep-node has no dependencies, it will trivially evaluate to green. Don't we need at least a dependency on the query that does the feeding?

cc @oli-obk & @cjgillot