invalid attempt to unwrap a None some_prev with -Cinstrument-coverage

[PalmPTSJ]

Code

<code>

This is noticed on this oss-fuzz build for cras. I haven't tried to create a verifiable example, but from the log it is failing on a public crate dbus. It is also failing only when compiling with -Cinstrument-coverage

Meta

rustc --version --verbose:

rustc 1.76.0-nightly (9fad68599 2023-12-03)
binary: rustc
commit-hash: 9fad6859925b34f9a0b1af592a7839ccb1e71f60
commit-date: 2023-12-03
host: x86_64-unknown-linux-gnu
release: 1.76.0-nightly
LLVM version: 17.0.5

Error output

error: internal compiler error: compiler/rustc_mir_transform/src/coverage/spans.rs:432:49: invalid attempt to unwrap a None some_prev

thread 'rustc' panicked at /rustc/9fad6859925b34f9a0b1af592a7839ccb1e71f60/compiler/rustc_errors/src/lib.rs:1653:9:
Box<dyn Any>
stack backtrace:
   0:     0x7f20ab68250c - std::backtrace_rs::backtrace::libunwind::trace::h6061033325ca8d5f
                               at /rustc/9fad6859925b34f9a0b1af592a7839ccb1e71f60/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
   1:     0x7f20ab68250c - std::backtrace_rs::backtrace::trace_unsynchronized::h3e9a48c0c4a79b3a
                               at /rustc/9fad6859925b34f9a0b1af592a7839ccb1e71f60/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f20ab68250c - std::sys_common::backtrace::_print_fmt::h985d7a9b6e153b96
                               at /rustc/9fad6859925b34f9a0b1af592a7839ccb1e71f60/library/std/src/sys_common/backtrace.rs:68:5
   3:     0x7f20ab68250c - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hcaf5c0187bbeca0c
                               at /rustc/9fad6859925b34f9a0b1af592a7839ccb1e71f60/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f20ab6d5540 - core::fmt::rt::Argument::fmt::h5f37de5ff02bcb40
                               at /rustc/9fad6859925b34f9a0b1af592a7839ccb1e71f60/library/core/src/fmt/rt.rs:142:9
   5:     0x7f20ab6d5540 - core::fmt::write::hc8bf769fed76ea64
                               at /rustc/9fad6859925b34f9a0b1af592a7839ccb1e71f60/library/core/src/fmt/mod.rs:1120:17
   6:     0x7f20ab67636f - std::io::Write::write_fmt::h114ebebf8c9b16a9
                               at /rustc/9fad6859925b34f9a0b1af592a7839ccb1e71f60/library/std/src/io/mod.rs:1810:15
   7:     0x7f20ab6822f4 - std::sys_common::backtrace::_print::h898ca07f2a79c2cd
                               at /rustc/9fad6859925b34f9a0b1af592a7839ccb1e71f60/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7f20ab6822f4 - std::sys_common::backtrace::print::h4b2c3082b37331f3
                               at /rustc/9fad6859925b34f9a0b1af592a7839ccb1e71f60/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7f20ab684f87 - std::panicking::default_hook::{{closure}}::hc9ef7d8adff7b1f3
  10:     0x7f20ab684cef - std::panicking::default_hook::h0b53001e401c6ada
                               at /rustc/9fad6859925b34f9a0b1af592a7839ccb1e71f60/library/std/src/panicking.rs:292:9
  11:     0x7f20ae3e1f90 - std[ca116cedd296397e]::panicking::update_hook::<alloc[f7f5c0c53ccdabe6]::boxed::Box<rustc_driver_impl[4e1279a210f875d1]::install_ice_hook::{closure#0}>>::{closure#0}
  12:     0x7f20ab6856c8 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h2e3061dd490aba0e
                               at /rustc/9fad6859925b34f9a0b1af592a7839ccb1e71f60/library/alloc/src/boxed.rs:2021:9
  13:     0x7f20ab6856c8 - std::panicking::rust_panic_with_hook::ha3012055304d5173
                               at /rustc/9fad6859925b34f9a0b1af592a7839ccb1e71f60/library/std/src/panicking.rs:783:13
  14:     0x7f20ae8286d4 - std[ca116cedd296397e]::panicking::begin_panic::<rustc_errors[506d090330ef3b9e]::ExplicitBug>::{closure#0}
  15:     0x7f20ae822916 - std[ca116cedd296397e]::sys_common::backtrace::__rust_end_short_backtrace::<std[ca116cedd296397e]::panicking::begin_panic<rustc_errors[506d090330ef3b9e]::ExplicitBug>::{closure#0}, !>
  16:     0x7f20ae81d416 - std[ca116cedd296397e]::panicking::begin_panic::<rustc_errors[506d090330ef3b9e]::ExplicitBug>
  17:     0x7f20ae805cf4 - <rustc_errors[506d090330ef3b9e]::HandlerInner>::bug::<alloc[f7f5c0c53ccdabe6]::string::String>
  18:     0x7f20ae8059fa - <rustc_errors[506d090330ef3b9e]::Handler>::bug::<alloc[f7f5c0c53ccdabe6]::string::String>
  19:     0x7f20ae8a2ead - rustc_middle[7c00a81cb0b3bac5]::util::bug::opt_span_bug_fmt::<rustc_span[eae331e1b7d19547]::span_encoding::Span>::{closure#0}
  20:     0x7f20ae889f7a - rustc_middle[7c00a81cb0b3bac5]::ty::context::tls::with_opt::<rustc_middle[7c00a81cb0b3bac5]::util::bug::opt_span_bug_fmt<rustc_span[eae331e1b7d19547]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  21:     0x7f20ae889e18 - rustc_middle[7c00a81cb0b3bac5]::ty::context::tls::with_context_opt::<rustc_middle[7c00a81cb0b3bac5]::ty::context::tls::with_opt<rustc_middle[7c00a81cb0b3bac5]::util::bug::opt_span_bug_fmt<rustc_span[eae331e1b7d19547]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  22:     0x7f20ac857850 - rustc_middle[7c00a81cb0b3bac5]::util::bug::bug_fmt
  23:     0x7f20aea3db1e - <rustc_mir_transform[cb44be0bd28f4d40]::coverage::spans::CoverageSpansGenerator>::take_prev
  24:     0x7f20aea3f2eb - <rustc_mir_transform[cb44be0bd28f4d40]::coverage::Instrumentor>::inject_counters
  25:     0x7f20aea3e4e0 - <rustc_mir_transform[cb44be0bd28f4d40]::coverage::InstrumentCoverage as rustc_middle[7c00a81cb0b3bac5]::mir::MirPass>::run_pass
  26:     0x7f20af7d28a8 - rustc_mir_transform[cb44be0bd28f4d40]::pass_manager::run_passes_inner
  27:     0x7f20ad98164c - rustc_mir_transform[cb44be0bd28f4d40]::mir_promoted
  28:     0x7f20afc976aa - rustc_query_impl[b20232bf4d4ffc8c]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[b20232bf4d4ffc8c]::query_impl::mir_promoted::dynamic_query::{closure#2}::{closure#0}, rustc_middle[7c00a81cb0b3bac5]::query::erase::Erased<[u8; 16usize]>>
  29:     0x7f20afc9796a - rustc_query_system[5bf07fe88c8b9bfa]::query::plumbing::try_execute_query::<rustc_query_impl[b20232bf4d4ffc8c]::DynamicConfig<rustc_query_system[5bf07fe88c8b9bfa]::query::caches::VecCache<rustc_span[eae331e1b7d19547]::def_id::LocalDefId, rustc_middle[7c00a81cb0b3bac5]::query::erase::Erased<[u8; 16usize]>>, false, false, false>, rustc_query_impl[b20232bf4d4ffc8c]::plumbing::QueryCtxt, false>
  30:     0x7f20afc975af - rustc_query_impl[b20232bf4d4ffc8c]::query_impl::mir_promoted::get_query_non_incr::__rust_end_short_backtrace
  31:     0x7f20b05519ad - rustc_borrowck[f0e26e51a8682d07]::mir_borrowck
  32:     0x7f20b05518ef - rustc_query_impl[b20232bf4d4ffc8c]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[b20232bf4d4ffc8c]::query_impl::mir_borrowck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[7c00a81cb0b3bac5]::query::erase::Erased<[u8; 8usize]>>
  33:     0x7f20af86f643 - rustc_query_system[5bf07fe88c8b9bfa]::query::plumbing::try_execute_query::<rustc_query_impl[b20232bf4d4ffc8c]::DynamicConfig<rustc_query_system[5bf07fe88c8b9bfa]::query::caches::VecCache<rustc_span[eae331e1b7d19547]::def_id::LocalDefId, rustc_middle[7c00a81cb0b3bac5]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[b20232bf4d4ffc8c]::plumbing::QueryCtxt, false>
  34:     0x7f20af86f090 - rustc_query_impl[b20232bf4d4ffc8c]::query_impl::mir_borrowck::get_query_non_incr::__rust_end_short_backtrace
  35:     0x7f20afb5180a - <rustc_borrowck[f0e26e51a8682d07]::type_check::TypeChecker>::prove_closure_bounds
  36:     0x7f20b05356e2 - <rustc_borrowck[f0e26e51a8682d07]::type_check::TypeChecker>::typeck_mir
  37:     0x7f20acba41fb - rustc_borrowck[f0e26e51a8682d07]::type_check::type_check
  38:     0x7f20acb88298 - rustc_borrowck[f0e26e51a8682d07]::nll::compute_regions
  39:     0x7f20b056180e - rustc_borrowck[f0e26e51a8682d07]::do_mir_borrowck
  40:     0x7f20b0551e4a - rustc_borrowck[f0e26e51a8682d07]::mir_borrowck
  41:     0x7f20b05518ef - rustc_query_impl[b20232bf4d4ffc8c]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[b20232bf4d4ffc8c]::query_impl::mir_borrowck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[7c00a81cb0b3bac5]::query::erase::Erased<[u8; 8usize]>>
  42:     0x7f20af86f643 - rustc_query_system[5bf07fe88c8b9bfa]::query::plumbing::try_execute_query::<rustc_query_impl[b20232bf4d4ffc8c]::DynamicConfig<rustc_query_system[5bf07fe88c8b9bfa]::query::caches::VecCache<rustc_span[eae331e1b7d19547]::def_id::LocalDefId, rustc_middle[7c00a81cb0b3bac5]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[b20232bf4d4ffc8c]::plumbing::QueryCtxt, false>
  43:     0x7f20af86f090 - rustc_query_impl[b20232bf4d4ffc8c]::query_impl::mir_borrowck::get_query_non_incr::__rust_end_short_backtrace
  44:     0x7f20b04f3094 - rustc_hir_analysis[aa935ef28292d8cf]::collect::type_of::type_of_opaque
  45:     0x7f20b04f2df3 - rustc_query_impl[b20232bf4d4ffc8c]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[b20232bf4d4ffc8c]::query_impl::type_of_opaque::dynamic_query::{closure#2}::{closure#0}, rustc_middle[7c00a81cb0b3bac5]::query::erase::Erased<[u8; 8usize]>>
  46:     0x7f20af747dd4 - rustc_query_system[5bf07fe88c8b9bfa]::query::plumbing::try_execute_query::<rustc_query_impl[b20232bf4d4ffc8c]::DynamicConfig<rustc_query_system[5bf07fe88c8b9bfa]::query::caches::DefaultCache<rustc_span[eae331e1b7d19547]::def_id::DefId, rustc_middle[7c00a81cb0b3bac5]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[b20232bf4d4ffc8c]::plumbing::QueryCtxt, false>
  47:     0x7f20b0706b5e - rustc_query_impl[b20232bf4d4ffc8c]::query_impl::type_of_opaque::get_query_non_incr::__rust_end_short_backtrace
  48:     0x7f20af7fa078 - rustc_middle[7c00a81cb0b3bac5]::query::plumbing::query_get_at::<rustc_query_system[5bf07fe88c8b9bfa]::query::caches::DefaultCache<rustc_span[eae331e1b7d19547]::def_id::DefId, rustc_middle[7c00a81cb0b3bac5]::query::erase::Erased<[u8; 8usize]>>>
  49:     0x7f20ad913a32 - rustc_hir_analysis[aa935ef28292d8cf]::collect::type_of::type_of
  50:     0x7f20af748f66 - rustc_query_impl[b20232bf4d4ffc8c]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[b20232bf4d4ffc8c]::query_impl::type_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle[7c00a81cb0b3bac5]::query::erase::Erased<[u8; 8usize]>>
  51:     0x7f20af747dd4 - rustc_query_system[5bf07fe88c8b9bfa]::query::plumbing::try_execute_query::<rustc_query_impl[b20232bf4d4ffc8c]::DynamicConfig<rustc_query_system[5bf07fe88c8b9bfa]::query::caches::DefaultCache<rustc_span[eae331e1b7d19547]::def_id::DefId, rustc_middle[7c00a81cb0b3bac5]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[b20232bf4d4ffc8c]::plumbing::QueryCtxt, false>
  52:     0x7f20af74799b - rustc_query_impl[b20232bf4d4ffc8c]::query_impl::type_of::get_query_non_incr::__rust_end_short_backtrace
  53:     0x7f20af7fa078 - rustc_middle[7c00a81cb0b3bac5]::query::plumbing::query_get_at::<rustc_query_system[5bf07fe88c8b9bfa]::query::caches::DefaultCache<rustc_span[eae331e1b7d19547]::def_id::DefId, rustc_middle[7c00a81cb0b3bac5]::query::erase::Erased<[u8; 8usize]>>>
  54:     0x7f20b048e93a - rustc_hir_analysis[aa935ef28292d8cf]::check::check::check_mod_item_types
  55:     0x7f20b048cc79 - rustc_query_impl[b20232bf4d4ffc8c]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[b20232bf4d4ffc8c]::query_impl::check_mod_item_types::dynamic_query::{closure#2}::{closure#0}, rustc_middle[7c00a81cb0b3bac5]::query::erase::Erased<[u8; 0usize]>>
  56:     0x7f20b015c23b - rustc_query_system[5bf07fe88c8b9bfa]::query::plumbing::try_execute_query::<rustc_query_impl[b20232bf4d4ffc8c]::DynamicConfig<rustc_query_system[5bf07fe88c8b9bfa]::query::caches::DefaultCache<rustc_span[eae331e1b7d19547]::def_id::LocalModDefId, rustc_middle[7c00a81cb0b3bac5]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[b20232bf4d4ffc8c]::plumbing::QueryCtxt, false>
  57:     0x7f20b015bc17 - rustc_query_impl[b20232bf4d4ffc8c]::query_impl::check_mod_item_types::get_query_non_incr::__rust_end_short_backtrace
  58:     0x7f20aff77f23 - rustc_hir_analysis[aa935ef28292d8cf]::check_crate
  59:     0x7f20b0167662 - rustc_interface[de342c667529d873]::passes::analysis
  60:     0x7f20b016729d - rustc_query_impl[b20232bf4d4ffc8c]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[b20232bf4d4ffc8c]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[7c00a81cb0b3bac5]::query::erase::Erased<[u8; 1usize]>>
  61:     0x7f20b065f780 - rustc_query_system[5bf07fe88c8b9bfa]::query::plumbing::try_execute_query::<rustc_query_impl[b20232bf4d4ffc8c]::DynamicConfig<rustc_query_system[5bf07fe88c8b9bfa]::query::caches::SingleCache<rustc_middle[7c00a81cb0b3bac5]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[b20232bf4d4ffc8c]::plumbing::QueryCtxt, false>
  62:     0x7f20b065f587 - rustc_query_impl[b20232bf4d4ffc8c]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  63:     0x7f20b066de52 - rustc_interface[de342c667529d873]::interface::run_compiler::<core[c0bc3e49ab39a50c]::result::Result<(), rustc_span[eae331e1b7d19547]::ErrorGuaranteed>, rustc_driver_impl[4e1279a210f875d1]::run_compiler::{closure#0}>::{closure#0}
  64:     0x7f20b0661249 - std[ca116cedd296397e]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[de342c667529d873]::util::run_in_thread_with_globals<rustc_interface[de342c667529d873]::util::run_in_thread_pool_with_globals<rustc_interface[de342c667529d873]::interface::run_compiler<core[c0bc3e49ab39a50c]::result::Result<(), rustc_span[eae331e1b7d19547]::ErrorGuaranteed>, rustc_driver_impl[4e1279a210f875d1]::run_compiler::{closure#0}>::{closure#0}, core[c0bc3e49ab39a50c]::result::Result<(), rustc_span[eae331e1b7d19547]::ErrorGuaranteed>>::{closure#0}, core[c0bc3e49ab39a50c]::result::Result<(), rustc_span[eae331e1b7d19547]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[c0bc3e49ab39a50c]::result::Result<(), rustc_span[eae331e1b7d19547]::ErrorGuaranteed>>
  65:     0x7f20b0661073 - <<std[ca116cedd296397e]::thread::Builder>::spawn_unchecked_<rustc_interface[de342c667529d873]::util::run_in_thread_with_globals<rustc_interface[de342c667529d873]::util::run_in_thread_pool_with_globals<rustc_interface[de342c667529d873]::interface::run_compiler<core[c0bc3e49ab39a50c]::result::Result<(), rustc_span[eae331e1b7d19547]::ErrorGuaranteed>, rustc_driver_impl[4e1279a210f875d1]::run_compiler::{closure#0}>::{closure#0}, core[c0bc3e49ab39a50c]::result::Result<(), rustc_span[eae331e1b7d19547]::ErrorGuaranteed>>::{closure#0}, core[c0bc3e49ab39a50c]::result::Result<(), rustc_span[eae331e1b7d19547]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[c0bc3e49ab39a50c]::result::Result<(), rustc_span[eae331e1b7d19547]::ErrorGuaranteed>>::{closure#1} as core[c0bc3e49ab39a50c]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  66:     0x7f20ab68f555 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hd1c6f093d833cd0b
                               at /rustc/9fad6859925b34f9a0b1af592a7839ccb1e71f60/library/alloc/src/boxed.rs:2007:9
  67:     0x7f20ab68f555 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hc0da20453235ce5e
                               at /rustc/9fad6859925b34f9a0b1af592a7839ccb1e71f60/library/alloc/src/boxed.rs:2007:9
  68:     0x7f20ab68f555 - std::sys::unix::thread::Thread::new::thread_start::he4d6253d6192e596
                               at /rustc/9fad6859925b34f9a0b1af592a7839ccb1e71f60/library/std/src/sys/unix/thread.rs:108:17
  69:     0x7f20ab5a3609 - start_thread
  70:     0x7f20ab4c6133 - clone
  71:                0x0 - <unknown>

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 attach the file at `/rust/registry/src/index.crates.io-6f17d22bba15001f/dbus-0.9.7/rustc-ice-2023-12-06T03_53_32-2281.txt` to your bug report

note: compiler flags: --crate-type lib -C opt-level=3 -C panic=abort -C linker-plugin-lto -C overflow-checks=on -C debuginfo=1 -C force-frame-pointers -C instrument-coverage -C link-arg=-lc++

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

query stack during panic:
#0 [mir_promoted] promoting constants in MIR for `nonblock::<impl at /rust/registry/src/index.crates.io-6f17d22bba15001f/dbus-0.9.7/src/nonblock.rs:226:1: 226:8>::request_name::{closure#0}`
#1 [mir_borrowck] borrow-checking `nonblock::<impl at /rust/registry/src/index.crates.io-6f17d22bba15001f/dbus-0.9.7/src/nonblock.rs:226:1: 226:8>::request_name::{closure#0}`
#2 [mir_borrowck] borrow-checking `nonblock::<impl at /rust/registry/src/index.crates.io-6f17d22bba15001f/dbus-0.9.7/src/nonblock.rs:226:1: 226:8>::request_name`
#3 [type_of_opaque] computing type of opaque `nonblock::<impl at /rust/registry/src/index.crates.io-6f17d22bba15001f/dbus-0.9.7/src/nonblock.rs:226:1: 226:8>::request_name::{opaque#0}`
#4 [type_of] computing type of `nonblock::<impl at /rust/registry/src/index.crates.io-6f17d22bba15001f/dbus-0.9.7/src/nonblock.rs:226:1: 226:8>::request_name::{opaque#0}`
#5 [check_mod_item_types] checking item types in module `nonblock`
#6 [analysis] running analysis passes on this crate
end of query stack
error: could not compile `dbus` (lib)

Backtrace

stack backtrace:
   0: std::panicking::begin_panic::<rustc_errors::ExplicitBug>
   1: <rustc_errors::HandlerInner>::bug::<alloc::string::String>
   2: <rustc_errors::Handler>::bug::<alloc::string::String>
   3: rustc_middle::util::bug::opt_span_bug_fmt::<rustc_span::span_encoding::Span>::{closure#0}
   4: rustc_middle::ty::context::tls::with_opt::<rustc_middle::util::bug::opt_span_bug_fmt<rustc_span::span_encoding::Span>::{closure#0}, !>::{closure#0}
   5: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_opt<rustc_middle::util::bug::opt_span_bug_fmt<rustc_span::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
   6: rustc_middle::util::bug::bug_fmt
   7: <rustc_mir_transform::coverage::spans::CoverageSpansGenerator>::take_prev
   8: <rustc_mir_transform::coverage::Instrumentor>::inject_counters
   9: <rustc_mir_transform::coverage::InstrumentCoverage as rustc_middle::mir::MirPass>::run_pass
  10: rustc_mir_transform::pass_manager::run_passes_inner
  11: rustc_mir_transform::mir_promoted
      [... omitted 1 frame ...]
  12: rustc_borrowck::mir_borrowck
      [... omitted 1 frame ...]
  13: <rustc_borrowck::type_check::TypeChecker>::prove_closure_bounds
  14: <rustc_borrowck::type_check::TypeChecker>::typeck_mir
  15: rustc_borrowck::type_check::type_check
  16: rustc_borrowck::nll::compute_regions
  17: rustc_borrowck::do_mir_borrowck
  18: rustc_borrowck::mir_borrowck
      [... omitted 1 frame ...]
  19: rustc_hir_analysis::collect::type_of::type_of_opaque
      [... omitted 1 frame ...]
  20: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
  21: rustc_hir_analysis::collect::type_of::type_of
      [... omitted 1 frame ...]
  22: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
  23: rustc_hir_analysis::check::check::check_mod_item_types
      [... omitted 1 frame ...]
  24: rustc_hir_analysis::check_crate
  25: rustc_interface::passes::analysis
      [... omitted 1 frame ...]
  26: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0}
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

I think this is the same error as #118643. Also tried to bisect the oss-fuzz builder version and the regression is between (26333c732 2023-11-28) and (623b78849 2023-12-02):

# BAD
docker run -it gcr.io/oss-fuzz-base/base-builder-rust@sha256:d3833ad1befb9441b4a95b6dd3aae002dafca54edd2f08e23b8315ab186dae54 /bin/bash
root@52cbf0f87ca5:/src# cargo version
cargo 1.76.0-nightly (623b78849 2023-12-02)

# GOOD
docker run -it gcr.io/oss-fuzz-base/base-builder-rust@sha256:06843f64901b1819ce5157d04f0ec9d28c199ed9cba5423a6c6560d9d565b0f2 /bin/bash
root@54afa8cb0ae7:/src# cargo version
cargo 1.76.0-nightly (26333c732 2023-11-28)

[Zalathar]

@rustbot label +A-code-coverage

[Zalathar]

According to that regression range, this predates #118525 and doesn't coincide with any coverage-specific change that I know of.

So presumably a change elsewhere in the compiler confused the coverage instrumentor into encountering a latent bug.

[afq984]

I reproduced this with:

git clone https://github.com/diwic/dbus-rs  # which is 618262f5e3217cdd173d46d705bbac26c5141e21
cd dbus-rs
RUSTFLAGS='-C instrument-coverage'  cargo bisect-rustc

The report seems to be suggesting a different regression range as #118662 (comment)

searched nightlies: from nightly-2023-12-03 to nightly-2023-12-07
regressed nightly: nightly-2023-12-04
searched commit range: 90e321d...9fad685
regressed commit: 9fad685

bisected with cargo-bisect-rustc v0.6.7

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

cargo bisect-rustc 

[PalmPTSJ]

I just found out that the cargo and rustc version can be different. The rustc version of the first bad image is the same as the comment above

docker run -it gcr.io/oss-fuzz-base/base-builder-rust@sha256:d3833ad1befb9441b4a95b6dd3aae002dafca54edd2f08e23b8315ab186dae54 /bin/bash
root@155a141d569c:/src# rustc --version --verbose
rustc 1.76.0-nightly (9fad68599 2023-12-03)
binary: rustc
commit-hash: 9fad6859925b34f9a0b1af592a7839ccb1e71f60
commit-date: 2023-12-03
host: x86_64-unknown-linux-gnu
release: 1.76.0-nightly
LLVM version: 17.0.5

Sorry for the confusion

[afq984]

Confirmed this is fixed with #118666.

RUSTFLAGS="-C instrument-coverage" cargo bisect-rustc --preserve --start 2023-12-06 --end 2023-12-10 --regress=non-ice

Regression in rust-lang-ci@a10d556

searched nightlies: from nightly-2023-12-06 to nightly-2023-12-10
regressed nightly: nightly-2023-12-10
searched commit range: f967532...06e02d5
regressed commit: ce67033

bisected with cargo-bisect-rustc v0.6.7

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

cargo bisect-rustc --preserve --start 2023-12-06 --end 2023-12-10 --regress=non-ice 

[Enselic]

Triage: Thanks for the notice! #118666 also added a regression test so let's close this as fixed then.