ICE: Result::unwrap() on an Err value: NoMatch(…)

[matthiaskrgr]

auto-reduced (treereduce-rust):

fn main() {
    let _result = &std::ptr::from_ref(num).cast_mut().as_deref();
}

original:

fn main() {
    let _result = &std::ptr::from_ref(num).cast_mut().as_deref();
//~^ ERROR the method
}

Version information

rustc 1.80.0-nightly (0038c0210 2024-06-01)
binary: rustc
commit-hash: 0038c021031ce9f1ec2329469c8d85d0e681ef8f
commit-date: 2024-06-01
host: x86_64-unknown-linux-gnu
release: 1.80.0-nightly
LLVM version: 18.1.6

Command:
/home/matthias/.rustup/toolchains/master/bin/rustc -Zincremental-verify-ich=yes -Cincremental=<dir> -Cdebuginfo=2

Program output

error[E0425]: cannot find value `num` in this scope
 --> /tmp/icemaker_global_tempdir.pGnnw8VLEFsg/rustc_testrunner_tmpdir_reporting.vEn6DdFkY3AO/mvce.rs:2:39
  |
2 |     let _result = &std::ptr::from_ref(num).cast_mut().as_deref();
  |                                       ^^^ not found in this scope

warning: type annotations needed
 --> /tmp/icemaker_global_tempdir.pGnnw8VLEFsg/rustc_testrunner_tmpdir_reporting.vEn6DdFkY3AO/mvce.rs:2:44
  |
2 |     let _result = &std::ptr::from_ref(num).cast_mut().as_deref();
  |                                            ^^^^^^^^
  |
  = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
  = note: for more information, see issue #46906 <https://github.com/rust-lang/rust/issues/46906>
  = note: `#[warn(tyvar_behind_raw_pointer)]` on by default

warning: type annotations needed
 --> /tmp/icemaker_global_tempdir.pGnnw8VLEFsg/rustc_testrunner_tmpdir_reporting.vEn6DdFkY3AO/mvce.rs:2:55
  |
2 |     let _result = &std::ptr::from_ref(num).cast_mut().as_deref();
  |                                                       ^^^^^^^^
  |
  = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
  = note: for more information, see issue #46906 <https://github.com/rust-lang/rust/issues/46906>

thread 'rustc' panicked at compiler/rustc_hir_typeck/src/method/probe.rs:322:10:
called `Result::unwrap()` on an `Err` value: NoMatch(NoMatchData { static_candidates: [], unsatisfied_predicates: [], out_of_scope_traits: [], similar_candidate: None, mode: MethodCall })
stack backtrace:
   0:     0x714bd60ddcc5 - std::backtrace_rs::backtrace::libunwind::trace::he42dbd6b585695a2
                               at /rustc/0038c021031ce9f1ec2329469c8d85d0e681ef8f/library/std/src/../../backtrace/src/backtrace/libunwind.rs:116:5
   1:     0x714bd60ddcc5 - std::backtrace_rs::backtrace::trace_unsynchronized::he16000ea60a912d9
                               at /rustc/0038c021031ce9f1ec2329469c8d85d0e681ef8f/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x714bd60ddcc5 - std::sys_common::backtrace::_print_fmt::h66ed1913530aa332
                               at /rustc/0038c021031ce9f1ec2329469c8d85d0e681ef8f/library/std/src/sys_common/backtrace.rs:68:5
   3:     0x714bd60ddcc5 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h4c845af9af61c9f6
                               at /rustc/0038c021031ce9f1ec2329469c8d85d0e681ef8f/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x714bd612e46b - core::fmt::rt::Argument::fmt::h76a6a089a8bf7b9e
                               at /rustc/0038c021031ce9f1ec2329469c8d85d0e681ef8f/library/core/src/fmt/rt.rs:165:63
   5:     0x714bd612e46b - core::fmt::write::h713abc82305939ad
                               at /rustc/0038c021031ce9f1ec2329469c8d85d0e681ef8f/library/core/src/fmt/mod.rs:1168:21
   6:     0x714bd60d2a4f - std::io::Write::write_fmt::hd65fb68dbcd2831c
                               at /rustc/0038c021031ce9f1ec2329469c8d85d0e681ef8f/library/std/src/io/mod.rs:1835:15
   7:     0x714bd60dda9e - std::sys_common::backtrace::_print::hd11b2dfc947c3c27
                               at /rustc/0038c021031ce9f1ec2329469c8d85d0e681ef8f/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x714bd60dda9e - std::sys_common::backtrace::print::h91e6f5059325feb3
                               at /rustc/0038c021031ce9f1ec2329469c8d85d0e681ef8f/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x714bd60e04d9 - std::panicking::default_hook::{{closure}}::hfdb9c1cec82aff8b
  10:     0x714bd60e027a - std::panicking::default_hook::hb086bae11ee046f4
                               at /rustc/0038c021031ce9f1ec2329469c8d85d0e681ef8f/library/std/src/panicking.rs:298:9
  11:     0x714bd2749fa0 - std[63b5957b5a953143]::panicking::update_hook::<alloc[cae7206fa00581b7]::boxed::Box<rustc_driver_impl[8353f43e004ca277]::install_ice_hook::{closure#0}>>::{closure#0}
  12:     0x714bd60e0c0b - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h9fe9d644c417a734
                               at /rustc/0038c021031ce9f1ec2329469c8d85d0e681ef8f/library/alloc/src/boxed.rs:2077:9
  13:     0x714bd60e0c0b - std::panicking::rust_panic_with_hook::h40c11300784b4c18
                               at /rustc/0038c021031ce9f1ec2329469c8d85d0e681ef8f/library/std/src/panicking.rs:799:13
  14:     0x714bd60e0984 - std::panicking::begin_panic_handler::{{closure}}::h5bab24fe1d95fd1a
                               at /rustc/0038c021031ce9f1ec2329469c8d85d0e681ef8f/library/std/src/panicking.rs:664:13
  15:     0x714bd60de189 - std::sys_common::backtrace::__rust_end_short_backtrace::h0b77baf02d4c787a
                               at /rustc/0038c021031ce9f1ec2329469c8d85d0e681ef8f/library/std/src/sys_common/backtrace.rs:171:18
  16:     0x714bd60e06b7 - rust_begin_unwind
                               at /rustc/0038c021031ce9f1ec2329469c8d85d0e681ef8f/library/std/src/panicking.rs:652:5
  17:     0x714bd612aa03 - core::panicking::panic_fmt::h90145c2d43445af9
                               at /rustc/0038c021031ce9f1ec2329469c8d85d0e681ef8f/library/core/src/panicking.rs:72:14
  18:     0x714bd612b076 - core::result::unwrap_failed::h85dcb81186623b69
                               at /rustc/0038c021031ce9f1ec2329469c8d85d0e681ef8f/library/core/src/result.rs:1679:5
  19:     0x714bd29c1c7f - <rustc_hir_typeck[850ee040d7edf3c3]::fn_ctxt::FnCtxt>::probe_for_name_many
  20:     0x714bd299a1b2 - <rustc_hir_typeck[850ee040d7edf3c3]::fn_ctxt::FnCtxt>::report_no_match_method_error
  21:     0x714bd29c1f34 - <rustc_hir_typeck[850ee040d7edf3c3]::fn_ctxt::FnCtxt>::report_method_error
  22:     0x714bd445ff46 - <rustc_hir_typeck[850ee040d7edf3c3]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  23:     0x714bd4454607 - <rustc_hir_typeck[850ee040d7edf3c3]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  24:     0x714bd444d091 - <rustc_hir_typeck[850ee040d7edf3c3]::fn_ctxt::FnCtxt>::check_decl
  25:     0x714bd444fd87 - <rustc_hir_typeck[850ee040d7edf3c3]::fn_ctxt::FnCtxt>::check_block_with_expected
  26:     0x714bd4453f75 - <rustc_hir_typeck[850ee040d7edf3c3]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  27:     0x714bd440fe58 - rustc_hir_typeck[850ee040d7edf3c3]::check::check_fn
  28:     0x714bd440556c - rustc_hir_typeck[850ee040d7edf3c3]::typeck
  29:     0x714bd4404fd1 - rustc_query_impl[cd510f8c05a0ea8a]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[cd510f8c05a0ea8a]::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[6c616825b0bcdb80]::query::erase::Erased<[u8; 8usize]>>
  30:     0x714bd42038c2 - rustc_query_system[93cd2bfd03b3866f]::query::plumbing::try_execute_query::<rustc_query_impl[cd510f8c05a0ea8a]::DynamicConfig<rustc_query_system[93cd2bfd03b3866f]::query::caches::VecCache<rustc_span[25512e2860c1584]::def_id::LocalDefId, rustc_middle[6c616825b0bcdb80]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[cd510f8c05a0ea8a]::plumbing::QueryCtxt, true>
  31:     0x714bd4172554 - rustc_query_impl[cd510f8c05a0ea8a]::query_impl::typeck::get_query_incr::__rust_end_short_backtrace
  32:     0x714bd41feecb - <rustc_middle[6c616825b0bcdb80]::hir::map::Map>::par_body_owners::<rustc_hir_analysis[d5af9a64c4217f61]::check_crate::{closure#4}>::{closure#0}
  33:     0x714bd41fd98b - rustc_hir_analysis[d5af9a64c4217f61]::check_crate
  34:     0x714bd415dbbe - rustc_interface[68582a38c0a5d471]::passes::analysis
  35:     0x714bd415d71b - rustc_query_impl[cd510f8c05a0ea8a]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[cd510f8c05a0ea8a]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[6c616825b0bcdb80]::query::erase::Erased<[u8; 1usize]>>
  36:     0x714bd49a004e - rustc_query_system[93cd2bfd03b3866f]::query::plumbing::try_execute_query::<rustc_query_impl[cd510f8c05a0ea8a]::DynamicConfig<rustc_query_system[93cd2bfd03b3866f]::query::caches::SingleCache<rustc_middle[6c616825b0bcdb80]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[cd510f8c05a0ea8a]::plumbing::QueryCtxt, true>
  37:     0x714bd499fc7a - rustc_query_impl[cd510f8c05a0ea8a]::query_impl::analysis::get_query_incr::__rust_end_short_backtrace
  38:     0x714bd47df0e0 - rustc_interface[68582a38c0a5d471]::interface::run_compiler::<core[b73d62a4aa8e98c4]::result::Result<(), rustc_span[25512e2860c1584]::ErrorGuaranteed>, rustc_driver_impl[8353f43e004ca277]::run_compiler::{closure#0}>::{closure#1}
  39:     0x714bd47cab89 - std[63b5957b5a953143]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[68582a38c0a5d471]::util::run_in_thread_with_globals<rustc_interface[68582a38c0a5d471]::util::run_in_thread_pool_with_globals<rustc_interface[68582a38c0a5d471]::interface::run_compiler<core[b73d62a4aa8e98c4]::result::Result<(), rustc_span[25512e2860c1584]::ErrorGuaranteed>, rustc_driver_impl[8353f43e004ca277]::run_compiler::{closure#0}>::{closure#1}, core[b73d62a4aa8e98c4]::result::Result<(), rustc_span[25512e2860c1584]::ErrorGuaranteed>>::{closure#0}, core[b73d62a4aa8e98c4]::result::Result<(), rustc_span[25512e2860c1584]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[b73d62a4aa8e98c4]::result::Result<(), rustc_span[25512e2860c1584]::ErrorGuaranteed>>
  40:     0x714bd47ca940 - <<std[63b5957b5a953143]::thread::Builder>::spawn_unchecked_<rustc_interface[68582a38c0a5d471]::util::run_in_thread_with_globals<rustc_interface[68582a38c0a5d471]::util::run_in_thread_pool_with_globals<rustc_interface[68582a38c0a5d471]::interface::run_compiler<core[b73d62a4aa8e98c4]::result::Result<(), rustc_span[25512e2860c1584]::ErrorGuaranteed>, rustc_driver_impl[8353f43e004ca277]::run_compiler::{closure#0}>::{closure#1}, core[b73d62a4aa8e98c4]::result::Result<(), rustc_span[25512e2860c1584]::ErrorGuaranteed>>::{closure#0}, core[b73d62a4aa8e98c4]::result::Result<(), rustc_span[25512e2860c1584]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[b73d62a4aa8e98c4]::result::Result<(), rustc_span[25512e2860c1584]::ErrorGuaranteed>>::{closure#2} as core[b73d62a4aa8e98c4]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  41:     0x714bd60eabfb - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hd9dcc2087244c614
                               at /rustc/0038c021031ce9f1ec2329469c8d85d0e681ef8f/library/alloc/src/boxed.rs:2063:9
  42:     0x714bd60eabfb - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h1ce3b5bddc9a8858
                               at /rustc/0038c021031ce9f1ec2329469c8d85d0e681ef8f/library/alloc/src/boxed.rs:2063:9
  43:     0x714bd60eabfb - std::sys::pal::unix::thread::Thread::new::thread_start::h3072c5274e382bf5
                               at /rustc/0038c021031ce9f1ec2329469c8d85d0e681ef8f/library/std/src/sys/pal/unix/thread.rs:108:17
  44:     0x714bd5e871cf - <unknown>
  45:     0x714bd5f086ec - <unknown>
  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: please make sure that you have updated to the latest nightly

note: rustc 1.80.0-nightly (0038c0210 2024-06-01) running on x86_64-unknown-linux-gnu

note: compiler flags: -Z incremental-verify-ich=yes -C incremental=[REDACTED] -C debuginfo=2

query stack during panic:
#0 [typeck] type-checking `main`
#1 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to 1 previous error; 2 warnings emitted

For more information about this error, try `rustc --explain E0425`.

[matthiaskrgr]

#125466 cc @compiler-errors ^^

[matthiaskrgr]

fn main() {
    std::ptr::from_ref(NOPE).cast_mut().as_deref();
}

[gurry]

@rustbot claim