ice: `assertion failed: promoted.is_none() || Q::ALLOW_PROMOTED'`

[matthiaskrgr]

Code

~/.rustup/toolchains/317ec04d18ab9c5d09a4d9b4418a12da8974b961/bin/rustc ./tests/ui/consts/precise-drop-with-promoted.rs --crate-type lib

// Regression test for issue #89938.
// check-pass
// compile-flags: --crate-type=lib
#![feature(const_precise_live_drops)]

pub const fn f() {
    let _: Option<String> = None;
    let _: &'static Option<String> = &None;
}

Backtrace

thread 'rustc' panicked at 'assertion failed: promoted.is_none() || Q::ALLOW_PROMOTED', compiler/rustc_const_eval/src/transform/check_consts/qualifs.rs:370:9
stack backtrace:
   0:     0x7f95ed962fc1 - std::backtrace_rs::backtrace::libunwind::trace::h59991b981c5287c1
                               at /rustc/317ec04d18ab9c5d09a4d9b4418a12da8974b961/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7f95ed962fc1 - std::backtrace_rs::backtrace::trace_unsynchronized::hb8ad91f071341da2
                               at /rustc/317ec04d18ab9c5d09a4d9b4418a12da8974b961/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f95ed962fc1 - std::sys_common::backtrace::_print_fmt::h42309d0372aa0305
                               at /rustc/317ec04d18ab9c5d09a4d9b4418a12da8974b961/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7f95ed962fc1 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::he508018a1d2558c5
                               at /rustc/317ec04d18ab9c5d09a4d9b4418a12da8974b961/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f95ed9c949c - core::fmt::rt::Argument::fmt::h974de3f325024a6a
                               at /rustc/317ec04d18ab9c5d09a4d9b4418a12da8974b961/library/core/src/fmt/rt.rs:138:9
   5:     0x7f95ed9c949c - core::fmt::write::h6568507fd6fbd8e7
                               at /rustc/317ec04d18ab9c5d09a4d9b4418a12da8974b961/library/core/src/fmt/mod.rs:1094:21
   6:     0x7f95ed9557ae - std::io::Write::write_fmt::hb0e531fb021517a1
                               at /rustc/317ec04d18ab9c5d09a4d9b4418a12da8974b961/library/std/src/io/mod.rs:1714:15
   7:     0x7f95ed962dd5 - std::sys_common::backtrace::_print::h64513e567ed012df
                               at /rustc/317ec04d18ab9c5d09a4d9b4418a12da8974b961/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7f95ed962dd5 - std::sys_common::backtrace::print::hb570de3a5eabf190
                               at /rustc/317ec04d18ab9c5d09a4d9b4418a12da8974b961/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7f95ed965e2a - std::panicking::panic_hook_with_disk_dump::{{closure}}::h9a144349d0daca0a
                               at /rustc/317ec04d18ab9c5d09a4d9b4418a12da8974b961/library/std/src/panicking.rs:278:22
  10:     0x7f95ed965ac3 - std::panicking::panic_hook_with_disk_dump::h4953ecb0a9225883
                               at /rustc/317ec04d18ab9c5d09a4d9b4418a12da8974b961/library/std/src/panicking.rs:312:9
  11:     0x7f95f0c0a349 - <rustc_driver_impl[5794e20b60233f09]::install_ice_hook::{closure#0} as core[c77199ccfcb9e47a]::ops::function::FnOnce<(&core[c77199ccfcb9e47a]::panic::panic_info::PanicInfo,)>>::call_once::{shim:vtable#0}
  12:     0x7f95ed9666d0 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h49f5b2a64dbc47c1
                               at /rustc/317ec04d18ab9c5d09a4d9b4418a12da8974b961/library/alloc/src/boxed.rs:2021:9
  13:     0x7f95ed9666d0 - std::panicking::rust_panic_with_hook::he2dec82ec7ad641b
                               at /rustc/317ec04d18ab9c5d09a4d9b4418a12da8974b961/library/std/src/panicking.rs:733:13
  14:     0x7f95ed966411 - std::panicking::begin_panic_handler::{{closure}}::h1648ef9af5900638
                               at /rustc/317ec04d18ab9c5d09a4d9b4418a12da8974b961/library/std/src/panicking.rs:619:13
  15:     0x7f95ed963426 - std::sys_common::backtrace::__rust_end_short_backtrace::h9650ffdb0776cb74
                               at /rustc/317ec04d18ab9c5d09a4d9b4418a12da8974b961/library/std/src/sys_common/backtrace.rs:151:18
  16:     0x7f95ed9661a2 - rust_begin_unwind
                               at /rustc/317ec04d18ab9c5d09a4d9b4418a12da8974b961/library/std/src/panicking.rs:617:5
  17:     0x7f95ed9c5853 - core::panicking::panic_fmt::ha90f78f5cebcb87c
                               at /rustc/317ec04d18ab9c5d09a4d9b4418a12da8974b961/library/core/src/panicking.rs:67:14
  18:     0x7f95ed9c58e3 - core::panicking::panic::h00d22fc62b66689d
                               at /rustc/317ec04d18ab9c5d09a4d9b4418a12da8974b961/library/core/src/panicking.rs:117:5
  19:     0x7f95efda0ed9 - rustc_const_eval[ebb36ce959869d78]::transform::check_consts::qualifs::in_operand::<rustc_const_eval[ebb36ce959869d78]::transform::check_consts::qualifs::NeedsDrop, <rustc_const_eval[ebb36ce959869d78]::transform::check_consts::resolver::TransferFunction<rustc_const_eval[ebb36ce959869d78]::transform::check_consts::qualifs::NeedsDrop> as rustc_middle[cfff05fcf76cc9ce]::mir::visit::Visitor>::visit_assign::{closure#0}>
  20:     0x7f95efd9c6d6 - <rustc_const_eval[ebb36ce959869d78]::transform::check_consts::resolver::FlowSensitiveAnalysis<rustc_const_eval[ebb36ce959869d78]::transform::check_consts::qualifs::NeedsDrop> as rustc_mir_dataflow[2d44b638fe982fc7]::framework::Analysis>::apply_statement_effect
  21:     0x7f95efd927f3 - <rustc_const_eval[ebb36ce959869d78]::transform::check_consts::check::Qualifs>::needs_drop
  22:     0x7f95f0bdbd1d - <rustc_const_eval[ebb36ce959869d78]::transform::check_consts::post_drop_elaboration::CheckLiveDrops as rustc_middle[cfff05fcf76cc9ce]::mir::visit::Visitor>::visit_terminator
  23:     0x7f95f0bdb813 - rustc_const_eval[ebb36ce959869d78]::transform::check_consts::post_drop_elaboration::check_live_drops
  24:     0x7f95ef377ff0 - rustc_mir_transform[31f447ec97da68c4]::mir_drops_elaborated_and_const_checked
  25:     0x7f95eec5e98e - rustc_query_impl[fb60eba705f21227]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[fb60eba705f21227]::query_impl::mir_drops_elaborated_and_const_checked::dynamic_query::{closure#2}::{closure#0}, rustc_middle[cfff05fcf76cc9ce]::query::erase::Erased<[u8; 8usize]>>
  26:     0x7f95eec5e95e - <rustc_query_impl[fb60eba705f21227]::query_impl::mir_drops_elaborated_and_const_checked::dynamic_query::{closure#2} as core[c77199ccfcb9e47a]::ops::function::FnOnce<(rustc_middle[cfff05fcf76cc9ce]::ty::context::TyCtxt, rustc_span[471984cae341c897]::def_id::LocalDefId)>>::call_once
  27:     0x7f95eed9e34d - rustc_query_system[bb6b3584dde46c05]::query::plumbing::try_execute_query::<rustc_query_impl[fb60eba705f21227]::DynamicConfig<rustc_query_system[bb6b3584dde46c05]::query::caches::VecCache<rustc_span[471984cae341c897]::def_id::LocalDefId, rustc_middle[cfff05fcf76cc9ce]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[fb60eba705f21227]::plumbing::QueryCtxt, false>
  28:     0x7f95f0569bef - rustc_query_impl[fb60eba705f21227]::query_impl::mir_drops_elaborated_and_const_checked::get_query_non_incr::__rust_end_short_backtrace
  29:     0x7f95f00a2e54 - <rustc_session[f5739c170fbc16da]::session::Session>::time::<(), rustc_interface[9ab7ff69e90a1b39]::passes::analysis::{closure#2}>
  30:     0x7f95f009fbe5 - rustc_interface[9ab7ff69e90a1b39]::passes::analysis
  31:     0x7f95f01058da - rustc_query_impl[fb60eba705f21227]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[fb60eba705f21227]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[cfff05fcf76cc9ce]::query::erase::Erased<[u8; 1usize]>>
  32:     0x7f95f01058c9 - <rustc_query_impl[fb60eba705f21227]::query_impl::analysis::dynamic_query::{closure#2} as core[c77199ccfcb9e47a]::ops::function::FnOnce<(rustc_middle[cfff05fcf76cc9ce]::ty::context::TyCtxt, ())>>::call_once
  33:     0x7f95f02ae3d8 - rustc_query_system[bb6b3584dde46c05]::query::plumbing::try_execute_query::<rustc_query_impl[fb60eba705f21227]::DynamicConfig<rustc_query_system[bb6b3584dde46c05]::query::caches::SingleCache<rustc_middle[cfff05fcf76cc9ce]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[fb60eba705f21227]::plumbing::QueryCtxt, false>
  34:     0x7f95f02ae167 - rustc_query_impl[fb60eba705f21227]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  35:     0x7f95efe236e5 - <rustc_middle[cfff05fcf76cc9ce]::ty::context::GlobalCtxt>::enter::<rustc_driver_impl[5794e20b60233f09]::run_compiler::{closure#1}::{closure#2}::{closure#4}, core[c77199ccfcb9e47a]::result::Result<(), rustc_span[471984cae341c897]::ErrorGuaranteed>>
  36:     0x7f95efe22d12 - <rustc_interface[9ab7ff69e90a1b39]::interface::Compiler>::enter::<rustc_driver_impl[5794e20b60233f09]::run_compiler::{closure#1}::{closure#2}, core[c77199ccfcb9e47a]::result::Result<core[c77199ccfcb9e47a]::option::Option<rustc_interface[9ab7ff69e90a1b39]::queries::Linker>, rustc_span[471984cae341c897]::ErrorGuaranteed>>
  37:     0x7f95efe1bdc8 - std[41f1c318fc4ca9f3]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[9ab7ff69e90a1b39]::util::run_in_thread_pool_with_globals<rustc_interface[9ab7ff69e90a1b39]::interface::run_compiler<core[c77199ccfcb9e47a]::result::Result<(), rustc_span[471984cae341c897]::ErrorGuaranteed>, rustc_driver_impl[5794e20b60233f09]::run_compiler::{closure#1}>::{closure#0}, core[c77199ccfcb9e47a]::result::Result<(), rustc_span[471984cae341c897]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[c77199ccfcb9e47a]::result::Result<(), rustc_span[471984cae341c897]::ErrorGuaranteed>>
  38:     0x7f95efe1b54e - <<std[41f1c318fc4ca9f3]::thread::Builder>::spawn_unchecked_<rustc_interface[9ab7ff69e90a1b39]::util::run_in_thread_pool_with_globals<rustc_interface[9ab7ff69e90a1b39]::interface::run_compiler<core[c77199ccfcb9e47a]::result::Result<(), rustc_span[471984cae341c897]::ErrorGuaranteed>, rustc_driver_impl[5794e20b60233f09]::run_compiler::{closure#1}>::{closure#0}, core[c77199ccfcb9e47a]::result::Result<(), rustc_span[471984cae341c897]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[c77199ccfcb9e47a]::result::Result<(), rustc_span[471984cae341c897]::ErrorGuaranteed>>::{closure#1} as core[c77199ccfcb9e47a]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  39:     0x7f95ed970dc5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h6d36b437bd2c3626
                               at /rustc/317ec04d18ab9c5d09a4d9b4418a12da8974b961/library/alloc/src/boxed.rs:2007:9
  40:     0x7f95ed970dc5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h72c892e089db1d9f
                               at /rustc/317ec04d18ab9c5d09a4d9b4418a12da8974b961/library/alloc/src/boxed.rs:2007:9
  41:     0x7f95ed970dc5 - std::sys::unix::thread::Thread::new::thread_start::he096636bb1958c5f
                               at /rustc/317ec04d18ab9c5d09a4d9b4418a12da8974b961/library/std/src/sys/unix/thread.rs:108:17
  42:     0x7f95ed70244b - <unknown>
  43:     0x7f95ed785e40 - <unknown>
  44:                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 `/home/matthias/vcs/github/rust/rustc-ice-2023-07-28T17:24:51.673713381Z-3672316.txt` to your bug report

note: compiler flags: --crate-type lib

query stack during panic:
#0 [mir_drops_elaborated_and_const_checked] elaborating drops for `f`
#1 [analysis] running analysis passes on this crate
end of query stack

[matthiaskrgr]

Regression in aafd75a #114134 cc @fee1-dead

[fee1-dead]

#114134 has marked this as a known-bug already. Closing as duplicate of #110395.