Attempt to read from stolen value with -Zmir-enable-passes=+Inline, but not -Zinline-mir

[saethlin]

Code

fn main() {
    let func = || 123u8;
    func();
}

rustc +nightly -Zmir-opt-level=0 -Zmir-enable-passes=+Inline

Meta

rustc --version --verbose:

rustc 1.74.0-nightly (8ce4540bd 2023-09-29)
binary: rustc
commit-hash: 8ce4540bd6fe7d58d4bc05f1b137d61937d3cf72
commit-date: 2023-09-29
host: x86_64-unknown-linux-gnu
release: 1.74.0-nightly
LLVM version: 17.0.2

Error output

thread 'rustc' panicked at compiler/rustc_mir_transform/src/inline/cycle.rs:156:27:
attempted to read from stolen value: rustc_middle::mir::Body

Backtrace

thread 'rustc' panicked at compiler/rustc_mir_transform/src/inline/cycle.rs:156:27:
attempted to read from stolen value: rustc_middle::mir::Body
stack backtrace:
   0:     0x7ff80af6433c - std::backtrace_rs::backtrace::libunwind::trace::h2047b82b78957b16
                               at /rustc/8ce4540bd6fe7d58d4bc05f1b137d61937d3cf72/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7ff80af6433c - std::backtrace_rs::backtrace::trace_unsynchronized::he06321801fe2ac72
                               at /rustc/8ce4540bd6fe7d58d4bc05f1b137d61937d3cf72/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7ff80af6433c - std::sys_common::backtrace::_print_fmt::h3028a39ff66599c0
                               at /rustc/8ce4540bd6fe7d58d4bc05f1b137d61937d3cf72/library/std/src/sys_common/backtrace.rs:67:5
   3:     0x7ff80af6433c - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hd2dc6ab4971909d6
                               at /rustc/8ce4540bd6fe7d58d4bc05f1b137d61937d3cf72/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7ff80afc9f9c - core::fmt::rt::Argument::fmt::hae02ab67a447b751
                               at /rustc/8ce4540bd6fe7d58d4bc05f1b137d61937d3cf72/library/core/src/fmt/rt.rs:138:9
   5:     0x7ff80afc9f9c - core::fmt::write::h156c0157377de849
                               at /rustc/8ce4540bd6fe7d58d4bc05f1b137d61937d3cf72/library/core/src/fmt/mod.rs:1114:21
   6:     0x7ff80af570be - std::io::Write::write_fmt::hfda671e33214dbc9
                               at /rustc/8ce4540bd6fe7d58d4bc05f1b137d61937d3cf72/library/std/src/io/mod.rs:1763:15
   7:     0x7ff80af64124 - std::sys_common::backtrace::_print::he2b418ab91e1b6bc
                               at /rustc/8ce4540bd6fe7d58d4bc05f1b137d61937d3cf72/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7ff80af64124 - std::sys_common::backtrace::print::h39dd53e781dbe62d
                               at /rustc/8ce4540bd6fe7d58d4bc05f1b137d61937d3cf72/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7ff80af67003 - std::panicking::default_hook::{{closure}}::hac1d0be96ef52b84
                               at /rustc/8ce4540bd6fe7d58d4bc05f1b137d61937d3cf72/library/std/src/panicking.rs:272:22
  10:     0x7ff80af66d24 - std::panicking::default_hook::h430f734618200aae
                               at /rustc/8ce4540bd6fe7d58d4bc05f1b137d61937d3cf72/library/std/src/panicking.rs:292:9
  11:     0x7ff80e0f681f - std[9021ab7eb1800470]::panicking::update_hook::<alloc[b36931eabff6d458]::boxed::Box<rustc_driver_impl[3b155c69176e0130]::install_ice_hook::{closure#0}>>::{closure#0}
  12:     0x7ff80af67831 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h0ec3fa0b3629c93a
                               at /rustc/8ce4540bd6fe7d58d4bc05f1b137d61937d3cf72/library/alloc/src/boxed.rs:2021:9
  13:     0x7ff80af67831 - std::panicking::rust_panic_with_hook::hdb0a7131bd1f25e3
                               at /rustc/8ce4540bd6fe7d58d4bc05f1b137d61937d3cf72/library/std/src/panicking.rs:735:13
  14:     0x7ff80af675b1 - std::panicking::begin_panic_handler::{{closure}}::h2b42e435eaa711ee
                               at /rustc/8ce4540bd6fe7d58d4bc05f1b137d61937d3cf72/library/std/src/panicking.rs:609:13
  15:     0x7ff80af64866 - std::sys_common::backtrace::__rust_end_short_backtrace::h3652b1b01bc073c5
                               at /rustc/8ce4540bd6fe7d58d4bc05f1b137d61937d3cf72/library/std/src/sys_common/backtrace.rs:170:18
  16:     0x7ff80af67302 - rust_begin_unwind
                               at /rustc/8ce4540bd6fe7d58d4bc05f1b137d61937d3cf72/library/std/src/panicking.rs:597:5
  17:     0x7ff80afc6625 - core::panicking::panic_fmt::h7198c5e2f1cf748f
                               at /rustc/8ce4540bd6fe7d58d4bc05f1b137d61937d3cf72/library/core/src/panicking.rs:72:14
  18:     0x7ff80d3ef300 - rustc_mir_transform[ec90b8a83414cedc]::inline::cycle::mir_inliner_callees
  19:     0x7ff80c5e5715 - rustc_query_impl[fe2b8f031e651193]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[fe2b8f031e651193]::query_impl::mir_inliner_callees::dynamic_query::{closure#2}::{closure#0}, rustc_middle[7d6c6611b495d02e]::query::erase::Erased<[u8; 16usize]>>
  20:     0x7ff80c5e56e2 - <rustc_query_impl[fe2b8f031e651193]::query_impl::mir_inliner_callees::dynamic_query::{closure#2} as core[eac01cc03d7c90b2]::ops::function::FnOnce<(rustc_middle[7d6c6611b495d02e]::ty::context::TyCtxt, rustc_middle[7d6c6611b495d02e]::ty::instance::InstanceDef)>>::call_once
  21:     0x7ff80d33375a - rustc_query_system[dfd8d19a16263799]::query::plumbing::try_execute_query::<rustc_query_impl[fe2b8f031e651193]::DynamicConfig<rustc_query_system[dfd8d19a16263799]::query::caches::DefaultCache<rustc_middle[7d6c6611b495d02e]::ty::instance::InstanceDef, rustc_middle[7d6c6611b495d02e]::query::erase::Erased<[u8; 16usize]>>, false, false, false>, rustc_query_impl[fe2b8f031e651193]::plumbing::QueryCtxt, false>
  22:     0x7ff80d333454 - rustc_query_impl[fe2b8f031e651193]::query_impl::mir_inliner_callees::get_query_non_incr::__rust_end_short_backtrace
  23:     0x7ff80cff0605 - rustc_mir_transform[ec90b8a83414cedc]::inline::cycle::mir_callgraph_reachable::process
  24:     0x7ff80d59755f - rustc_mir_transform[ec90b8a83414cedc]::inline::cycle::mir_callgraph_reachable
  25:     0x7ff80d13eb3c - rustc_query_impl[fe2b8f031e651193]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[fe2b8f031e651193]::query_impl::mir_callgraph_reachable::dynamic_query::{closure#2}::{closure#0}, rustc_middle[7d6c6611b495d02e]::query::erase::Erased<[u8; 1usize]>>
  26:     0x7ff80d13eb04 - <rustc_query_impl[fe2b8f031e651193]::query_impl::mir_callgraph_reachable::dynamic_query::{closure#2} as core[eac01cc03d7c90b2]::ops::function::FnOnce<(rustc_middle[7d6c6611b495d02e]::ty::context::TyCtxt, (rustc_middle[7d6c6611b495d02e]::ty::instance::Instance, rustc_span[a848110e357b7e8b]::def_id::LocalDefId))>>::call_once
  27:     0x7ff80d551c31 - rustc_query_system[dfd8d19a16263799]::query::plumbing::try_execute_query::<rustc_query_impl[fe2b8f031e651193]::DynamicConfig<rustc_query_system[dfd8d19a16263799]::query::caches::DefaultCache<(rustc_middle[7d6c6611b495d02e]::ty::instance::Instance, rustc_span[a848110e357b7e8b]::def_id::LocalDefId), rustc_middle[7d6c6611b495d02e]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[fe2b8f031e651193]::plumbing::QueryCtxt, false>
  28:     0x7ff80d55191c - rustc_query_impl[fe2b8f031e651193]::query_impl::mir_callgraph_reachable::get_query_non_incr::__rust_end_short_backtrace
  29:     0x7ff80d0c5cec - <rustc_mir_transform[ec90b8a83414cedc]::inline::Inliner>::try_inlining
  30:     0x7ff80d0c4239 - <rustc_mir_transform[ec90b8a83414cedc]::inline::Inliner>::process_blocks
  31:     0x7ff80d0c3c2a - <rustc_mir_transform[ec90b8a83414cedc]::inline::Inline as rustc_middle[7d6c6611b495d02e]::mir::MirPass>::run_pass
  32:     0x7ff80c7bc031 - rustc_mir_transform[ec90b8a83414cedc]::pass_manager::run_passes
  33:     0x7ff80c7bb6ce - rustc_mir_transform[ec90b8a83414cedc]::optimized_mir
  34:     0x7ff80c27a7e8 - rustc_query_impl[fe2b8f031e651193]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[fe2b8f031e651193]::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle[7d6c6611b495d02e]::query::erase::Erased<[u8; 8usize]>>
  35:     0x7ff80c27a7b1 - <rustc_query_impl[fe2b8f031e651193]::query_impl::optimized_mir::dynamic_query::{closure#2} as core[eac01cc03d7c90b2]::ops::function::FnOnce<(rustc_middle[7d6c6611b495d02e]::ty::context::TyCtxt, rustc_span[a848110e357b7e8b]::def_id::DefId)>>::call_once
  36:     0x7ff80c2484c0 - rustc_query_system[dfd8d19a16263799]::query::plumbing::try_execute_query::<rustc_query_impl[fe2b8f031e651193]::DynamicConfig<rustc_query_system[dfd8d19a16263799]::query::caches::DefaultCache<rustc_span[a848110e357b7e8b]::def_id::DefId, rustc_middle[7d6c6611b495d02e]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[fe2b8f031e651193]::plumbing::QueryCtxt, false>
  37:     0x7ff80da51d92 - rustc_query_impl[fe2b8f031e651193]::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
  38:     0x7ff80c614020 - <rustc_middle[7d6c6611b495d02e]::ty::context::TyCtxt>::instance_mir
  39:     0x7ff80cee32a2 - rustc_monomorphize[825a039f47682177]::collector::collect_used_items
  40:     0x7ff80cee0685 - rustc_monomorphize[825a039f47682177]::collector::collect_items_rec
  41:     0x7ff80d5d4ea8 - rustc_data_structures[82d39ef94a006aa1]::sync::parallel::disabled::par_for_each_in::<alloc[b36931eabff6d458]::vec::Vec<rustc_middle[7d6c6611b495d02e]::mir::mono::MonoItem>, rustc_monomorphize[825a039f47682177]::collector::collect_crate_mono_items::{closure#1}::{closure#0}>
  42:     0x7ff80d5d4240 - <rustc_session[76460c32d01a7a92]::session::Session>::time::<(), rustc_monomorphize[825a039f47682177]::collector::collect_crate_mono_items::{closure#1}>
  43:     0x7ff80d5d3e88 - rustc_monomorphize[825a039f47682177]::collector::collect_crate_mono_items
  44:     0x7ff80d5d2458 - rustc_monomorphize[825a039f47682177]::partitioning::collect_and_partition_mono_items
  45:     0x7ff80d6dfde9 - rustc_query_impl[fe2b8f031e651193]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[fe2b8f031e651193]::query_impl::collect_and_partition_mono_items::dynamic_query::{closure#2}::{closure#0}, rustc_middle[7d6c6611b495d02e]::query::erase::Erased<[u8; 24usize]>>
  46:     0x7ff80d6dfdbd - <rustc_query_impl[fe2b8f031e651193]::query_impl::collect_and_partition_mono_items::dynamic_query::{closure#2} as core[eac01cc03d7c90b2]::ops::function::FnOnce<(rustc_middle[7d6c6611b495d02e]::ty::context::TyCtxt, ())>>::call_once
  47:     0x7ff80d854b57 - rustc_query_system[dfd8d19a16263799]::query::plumbing::try_execute_query::<rustc_query_impl[fe2b8f031e651193]::DynamicConfig<rustc_query_system[dfd8d19a16263799]::query::caches::SingleCache<rustc_middle[7d6c6611b495d02e]::query::erase::Erased<[u8; 24usize]>>, false, false, false>, rustc_query_impl[fe2b8f031e651193]::plumbing::QueryCtxt, false>
  48:     0x7ff80da6df92 - rustc_query_impl[fe2b8f031e651193]::query_impl::collect_and_partition_mono_items::get_query_non_incr::__rust_end_short_backtrace
  49:     0x7ff80d2e6e3b - rustc_codegen_ssa[5d19c6e4c53e5d1a]::base::codegen_crate::<rustc_codegen_llvm[2437d065f7431]::LlvmCodegenBackend>
  50:     0x7ff80d2e6c3f - <rustc_codegen_llvm[2437d065f7431]::LlvmCodegenBackend as rustc_codegen_ssa[5d19c6e4c53e5d1a]::traits::backend::CodegenBackend>::codegen_crate
  51:     0x7ff80d63ad22 - <rustc_session[76460c32d01a7a92]::session::Session>::time::<alloc[b36931eabff6d458]::boxed::Box<dyn core[eac01cc03d7c90b2]::any::Any>, rustc_interface[6d526cf79e1d2a3f]::passes::start_codegen::{closure#0}>
  52:     0x7ff80d63a87b - rustc_interface[6d526cf79e1d2a3f]::passes::start_codegen
  53:     0x7ff80d63509a - <rustc_middle[7d6c6611b495d02e]::ty::context::GlobalCtxt>::enter::<<rustc_interface[6d526cf79e1d2a3f]::queries::Queries>::ongoing_codegen::{closure#0}, core[eac01cc03d7c90b2]::result::Result<alloc[b36931eabff6d458]::boxed::Box<dyn core[eac01cc03d7c90b2]::any::Any>, rustc_span[a848110e357b7e8b]::ErrorGuaranteed>>
  54:     0x7ff80d633f4d - rustc_span[a848110e357b7e8b]::set_source_map::<core[eac01cc03d7c90b2]::result::Result<(), rustc_span[a848110e357b7e8b]::ErrorGuaranteed>, rustc_interface[6d526cf79e1d2a3f]::interface::run_compiler<core[eac01cc03d7c90b2]::result::Result<(), rustc_span[a848110e357b7e8b]::ErrorGuaranteed>, rustc_driver_impl[3b155c69176e0130]::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
  55:     0x7ff80d62e180 - std[9021ab7eb1800470]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[6d526cf79e1d2a3f]::util::run_in_thread_with_globals<rustc_interface[6d526cf79e1d2a3f]::interface::run_compiler<core[eac01cc03d7c90b2]::result::Result<(), rustc_span[a848110e357b7e8b]::ErrorGuaranteed>, rustc_driver_impl[3b155c69176e0130]::run_compiler::{closure#1}>::{closure#0}, core[eac01cc03d7c90b2]::result::Result<(), rustc_span[a848110e357b7e8b]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[eac01cc03d7c90b2]::result::Result<(), rustc_span[a848110e357b7e8b]::ErrorGuaranteed>>
  56:     0x7ff80d95758e - <<std[9021ab7eb1800470]::thread::Builder>::spawn_unchecked_<rustc_interface[6d526cf79e1d2a3f]::util::run_in_thread_with_globals<rustc_interface[6d526cf79e1d2a3f]::interface::run_compiler<core[eac01cc03d7c90b2]::result::Result<(), rustc_span[a848110e357b7e8b]::ErrorGuaranteed>, rustc_driver_impl[3b155c69176e0130]::run_compiler::{closure#1}>::{closure#0}, core[eac01cc03d7c90b2]::result::Result<(), rustc_span[a848110e357b7e8b]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[eac01cc03d7c90b2]::result::Result<(), rustc_span[a848110e357b7e8b]::ErrorGuaranteed>>::{closure#1} as core[eac01cc03d7c90b2]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  57:     0x7ff80af72395 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h002abea1d29efb77
                               at /rustc/8ce4540bd6fe7d58d4bc05f1b137d61937d3cf72/library/alloc/src/boxed.rs:2007:9
  58:     0x7ff80af72395 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::ha19d8c26cc20d38b
                               at /rustc/8ce4540bd6fe7d58d4bc05f1b137d61937d3cf72/library/alloc/src/boxed.rs:2007:9
  59:     0x7ff80af72395 - std::sys::unix::thread::Thread::new::thread_start::h6dc2d5714dd5ad65
                               at /rustc/8ce4540bd6fe7d58d4bc05f1b137d61937d3cf72/library/std/src/sys/unix/thread.rs:108:17
  60:     0x7ff80ad129eb - <unknown>
  61:     0x7ff80ad967cc - <unknown>
  62:                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: please attach the file at `/tmp/rustc-ice-2023-09-30T16:58:02.848316288Z-1802240.txt` to your bug report

note: compiler flags: -Z mir-opt-level=0 -Z mir-enable-passes=+Inline

query stack during panic:
#0 [mir_inliner_callees] computing all local function calls in `main::{closure#0}`
#1 [mir_callgraph_reachable] computing if `main::{closure#0}` (transitively) calls `main`
#2 [optimized_mir] optimizing MIR for `main`
#3 [collect_and_partition_mono_items] collect_and_partition_mono_items
end of query stack

[matthiaskrgr]

Hmm, is it worthwhile fuzzing standalone mir passes or do we have dependencies between them?

[saethlin]

They should work independently, but the problem here isn't that one pass is relying on another to be run.

[saethlin]

Fixing this is blocked by #116294 because I can't create a stable test for this problem with that bug.

[cjgillot]

Marking as fixed by #116896