ICE: !ty.is_copy_modulo_regions(tcx, param_env)

[matthiaskrgr]

snippet:

#![feature(unsized_fn_params)]

use std::fmt::{self, Display};

pub enum MethodKind {
    Trait { body: str },
    Inherent,
}

#[derive(Copy, Clone, PartialEq, Debug)]
pub enum Target {
    Method(MethodKind),
}

impl Display for Target {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "{}", Self::name(*self))
    }
}

impl Target {
    pub fn name(self) -> &'static str {}
}

Version information

rustc 1.78.0-nightly (840164571 2024-03-09)
binary: rustc
commit-hash: 8401645716b26a8b4c6974dc0680e55e81e9e8a1
commit-date: 2024-03-09
host: x86_64-unknown-linux-gnu
release: 1.78.0-nightly
LLVM version: 18.1.0

Command:
/home/matthias/.rustup/toolchains/master/bin/rustc

Program output

error[E0601]: `main` function not found in crate `mvce`
  --> /tmp/icemaker_global_tempdir.Dod2gYKM516h/rustc_testrunner_tmpdir_reporting.txW3v63cD0Q3/mvce.rs:23:2
   |
23 | }
   |  ^ consider adding a `main` function to `/tmp/icemaker_global_tempdir.Dod2gYKM516h/rustc_testrunner_tmpdir_reporting.txW3v63cD0Q3/mvce.rs`

error[E0277]: the size for values of type `str` cannot be known at compilation time
 --> /tmp/icemaker_global_tempdir.Dod2gYKM516h/rustc_testrunner_tmpdir_reporting.txW3v63cD0Q3/mvce.rs:6:19
  |
6 |     Trait { body: str },
  |                   ^^^ doesn't have a size known at compile-time
  |
  = help: the trait `Sized` is not implemented for `str`
  = note: no field of an enum variant may have a dynamically sized type
  = help: change the field's type to have a statically known size
help: borrowed types always have a statically known size
  |
6 |     Trait { body: &str },
  |                   +
help: the `Box` type always has a statically known size and allocates its contents in the heap
  |
6 |     Trait { body: Box<str> },
  |                   ++++   +

error[E0277]: the size for values of type `str` cannot be known at compilation time
  --> /tmp/icemaker_global_tempdir.Dod2gYKM516h/rustc_testrunner_tmpdir_reporting.txW3v63cD0Q3/mvce.rs:12:12
   |
12 |     Method(MethodKind),
   |            ^^^^^^^^^^ doesn't have a size known at compile-time
   |
   = help: within `MethodKind`, the trait `Sized` is not implemented for `str`, which is required by `MethodKind: Sized`
note: required because it appears within the type `MethodKind`
  --> /tmp/icemaker_global_tempdir.Dod2gYKM516h/rustc_testrunner_tmpdir_reporting.txW3v63cD0Q3/mvce.rs:5:10
   |
5  | pub enum MethodKind {
   |          ^^^^^^^^^^
   = note: no field of an enum variant may have a dynamically sized type
   = help: change the field's type to have a statically known size
help: borrowed types always have a statically known size
   |
12 |     Method(&MethodKind),
   |            +
help: the `Box` type always has a statically known size and allocates its contents in the heap
   |
12 |     Method(Box<MethodKind>),
   |            ++++          +

error[E0204]: the trait `Copy` cannot be implemented for this type
  --> /tmp/icemaker_global_tempdir.Dod2gYKM516h/rustc_testrunner_tmpdir_reporting.txW3v63cD0Q3/mvce.rs:10:10
   |
10 | #[derive(Copy, Clone, PartialEq, Debug)]
   |          ^^^^
11 | pub enum Target {
12 |     Method(MethodKind),
   |            ---------- this field does not implement `Copy`
   |
   = note: this error originates in the derive macro `Copy` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0277]: the size for values of type `str` cannot be known at compilation time
   --> /tmp/icemaker_global_tempdir.Dod2gYKM516h/rustc_testrunner_tmpdir_reporting.txW3v63cD0Q3/mvce.rs:10:16
    |
10  | #[derive(Copy, Clone, PartialEq, Debug)]
    |                ^^^^^ doesn't have a size known at compile-time
    |
    = help: within `Target`, the trait `Sized` is not implemented for `str`, which is required by `Target: Sized`
note: required because it appears within the type `Target`
   --> /tmp/icemaker_global_tempdir.Dod2gYKM516h/rustc_testrunner_tmpdir_reporting.txW3v63cD0Q3/mvce.rs:11:10
    |
11  | pub enum Target {
    |          ^^^^^^
note: required by a bound in `Clone`
   --> /home/matthias/.rustup/toolchains/master/lib/rustlib/src/rust/library/core/src/clone.rs:147:18
    |
147 | pub trait Clone: Sized {
    |                  ^^^^^ required by this bound in `Clone`
    = note: this error originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0277]: the trait bound `MethodKind: Clone` is not satisfied
   --> /tmp/icemaker_global_tempdir.Dod2gYKM516h/rustc_testrunner_tmpdir_reporting.txW3v63cD0Q3/mvce.rs:12:12
    |
10  | #[derive(Copy, Clone, PartialEq, Debug)]
    |                ----- in this derive macro expansion
11  | pub enum Target {
12  |     Method(MethodKind),
    |            ^^^^^^^^^^ the trait `Clone` is not implemented for `MethodKind`
    |
note: required by a bound in `AssertParamIsClone`
   --> /home/matthias/.rustup/toolchains/master/lib/rustlib/src/rust/library/core/src/clone.rs:193:34
    |
193 | pub struct AssertParamIsClone<T: Clone + ?Sized> {
    |                                  ^^^^^ required by this bound in `AssertParamIsClone`
    = note: this error originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0277]: the size for values of type `str` cannot be known at compilation time
  --> /tmp/icemaker_global_tempdir.Dod2gYKM516h/rustc_testrunner_tmpdir_reporting.txW3v63cD0Q3/mvce.rs:10:16
   |
10 | #[derive(Copy, Clone, PartialEq, Debug)]
   |                ^^^^^ doesn't have a size known at compile-time
   |
   = help: within `Target`, the trait `Sized` is not implemented for `str`, which is required by `Target: Sized`
note: required because it appears within the type `Target`
  --> /tmp/icemaker_global_tempdir.Dod2gYKM516h/rustc_testrunner_tmpdir_reporting.txW3v63cD0Q3/mvce.rs:11:10
   |
11 | pub enum Target {
   |          ^^^^^^
   = note: the return type of a function must have a statically known size
   = note: this error originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0369]: binary operation `==` cannot be applied to type `MethodKind`
  --> /tmp/icemaker_global_tempdir.Dod2gYKM516h/rustc_testrunner_tmpdir_reporting.txW3v63cD0Q3/mvce.rs:12:12
   |
10 | #[derive(Copy, Clone, PartialEq, Debug)]
   |                       --------- in this derive macro expansion
11 | pub enum Target {
12 |     Method(MethodKind),
   |            ^^^^^^^^^^
   |
note: an implementation of `PartialEq` might be missing for `MethodKind`
  --> /tmp/icemaker_global_tempdir.Dod2gYKM516h/rustc_testrunner_tmpdir_reporting.txW3v63cD0Q3/mvce.rs:5:1
   |
5  | pub enum MethodKind {
   | ^^^^^^^^^^^^^^^^^^^ must implement `PartialEq`
   = note: this error originates in the derive macro `PartialEq` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider annotating `MethodKind` with `#[derive(PartialEq)]`
   |
5  + #[derive(PartialEq)]
6  | pub enum MethodKind {
   |

error[E0277]: `MethodKind` doesn't implement `Debug`
  --> /tmp/icemaker_global_tempdir.Dod2gYKM516h/rustc_testrunner_tmpdir_reporting.txW3v63cD0Q3/mvce.rs:12:12
   |
10 | #[derive(Copy, Clone, PartialEq, Debug)]
   |                                  ----- in this derive macro expansion
11 | pub enum Target {
12 |     Method(MethodKind),
   |            ^^^^^^^^^^ `MethodKind` cannot be formatted using `{:?}`
   |
   = help: the trait `Debug` is not implemented for `MethodKind`, which is required by `&MethodKind: Debug`
   = note: add `#[derive(Debug)]` to `MethodKind` or manually `impl Debug for MethodKind`
   = note: this error originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider annotating `MethodKind` with `#[derive(Debug)]`
   |
5  + #[derive(Debug)]
6  | pub enum MethodKind {
   |

error[E0308]: mismatched types
  --> /tmp/icemaker_global_tempdir.Dod2gYKM516h/rustc_testrunner_tmpdir_reporting.txW3v63cD0Q3/mvce.rs:22:26
   |
22 |     pub fn name(self) -> &'static str {}
   |            ----          ^^^^^^^^^^^^ expected `&str`, found `()`
   |            |
   |            implicitly returns `()` as its body has no tail or `return` expression

thread 'rustc' panicked at compiler/rustc_mir_build/src/build/expr/as_operand.rs:170:17:
assertion failed: !ty.is_copy_modulo_regions(tcx, param_env)
stack backtrace:
   0:     0x7f19a580fa02 - std::backtrace_rs::backtrace::libunwind::trace::hf3d4f3241dee1b61
                               at /rustc/8401645716b26a8b4c6974dc0680e55e81e9e8a1/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
   1:     0x7f19a580fa02 - std::backtrace_rs::backtrace::trace_unsynchronized::h17349fea4d65ac90
                               at /rustc/8401645716b26a8b4c6974dc0680e55e81e9e8a1/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f19a580fa02 - std::sys_common::backtrace::_print_fmt::h45a7733b6e7ef79f
                               at /rustc/8401645716b26a8b4c6974dc0680e55e81e9e8a1/library/std/src/sys_common/backtrace.rs:68:5
   3:     0x7f19a580fa02 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h3d166936f5a39350
                               at /rustc/8401645716b26a8b4c6974dc0680e55e81e9e8a1/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f19a586098c - core::fmt::rt::Argument::fmt::h3c678ecd54288730
                               at /rustc/8401645716b26a8b4c6974dc0680e55e81e9e8a1/library/core/src/fmt/rt.rs:142:9
   5:     0x7f19a586098c - core::fmt::write::h5f9e1f9d47b97ff6
                               at /rustc/8401645716b26a8b4c6974dc0680e55e81e9e8a1/library/core/src/fmt/mod.rs:1153:17
   6:     0x7f19a580447f - std::io::Write::write_fmt::h405197d4bb83f90f
                               at /rustc/8401645716b26a8b4c6974dc0680e55e81e9e8a1/library/std/src/io/mod.rs:1846:15
   7:     0x7f19a580f7d4 - std::sys_common::backtrace::_print::hc3f73834b26ce985
                               at /rustc/8401645716b26a8b4c6974dc0680e55e81e9e8a1/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7f19a580f7d4 - std::sys_common::backtrace::print::hf7cffd629e2559ea
                               at /rustc/8401645716b26a8b4c6974dc0680e55e81e9e8a1/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7f19a58124db - std::panicking::default_hook::{{closure}}::h2e6bfd324cff11b7
  10:     0x7f19a5812233 - std::panicking::default_hook::h4a51bd222c466c9e
                               at /rustc/8401645716b26a8b4c6974dc0680e55e81e9e8a1/library/std/src/panicking.rs:292:9
  11:     0x7f19a2469057 - std[d016f499f7096d82]::panicking::update_hook::<alloc[1a8c94bf243eff43]::boxed::Box<rustc_driver_impl[bdf94cba6429e3e9]::install_ice_hook::{closure#0}>>::{closure#0}
  12:     0x7f19a5812c40 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h0d13de13827d8d7c
                               at /rustc/8401645716b26a8b4c6974dc0680e55e81e9e8a1/library/alloc/src/boxed.rs:2034:9
  13:     0x7f19a5812c40 - std::panicking::rust_panic_with_hook::heea6de1892e55ab9
                               at /rustc/8401645716b26a8b4c6974dc0680e55e81e9e8a1/library/std/src/panicking.rs:783:13
  14:     0x7f19a5812949 - std::panicking::begin_panic_handler::{{closure}}::h45ea0224ab637a2b
                               at /rustc/8401645716b26a8b4c6974dc0680e55e81e9e8a1/library/std/src/panicking.rs:649:13
  15:     0x7f19a580fed6 - std::sys_common::backtrace::__rust_end_short_backtrace::h2bb303ad0af37de8
                               at /rustc/8401645716b26a8b4c6974dc0680e55e81e9e8a1/library/std/src/sys_common/backtrace.rs:171:18
  16:     0x7f19a58126b4 - rust_begin_unwind
                               at /rustc/8401645716b26a8b4c6974dc0680e55e81e9e8a1/library/std/src/panicking.rs:645:5
  17:     0x7f19a585cea5 - core::panicking::panic_fmt::hc32488af6c6f42f9
                               at /rustc/8401645716b26a8b4c6974dc0680e55e81e9e8a1/library/core/src/panicking.rs:72:14
  18:     0x7f19a585cf63 - core::panicking::panic::hb4526bed2464a4b1
                               at /rustc/8401645716b26a8b4c6974dc0680e55e81e9e8a1/library/core/src/panicking.rs:145:5
  19:     0x7f19a3a8ac2c - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::as_call_operand
  20:     0x7f19a3a89516 - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::as_call_operand
  21:     0x7f19a3f0de24 - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::expr_into_dest
  22:     0x7f19a3855d7a - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::as_temp::{closure#0}
  23:     0x7f19a3ccbbd7 - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::expr_as_place
  24:     0x7f19a3ccc0c9 - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::expr_as_place
  25:     0x7f19a3f0dafb - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::expr_into_dest
  26:     0x7f19a3855d7a - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::as_temp::{closure#0}
  27:     0x7f19a3ccbbd7 - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::expr_as_place
  28:     0x7f19a3ccba7a - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::expr_as_place
  29:     0x7f19a3f0dafb - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::expr_into_dest
  30:     0x7f19a3855d7a - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::as_temp::{closure#0}
  31:     0x7f19a385432e - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::as_operand
  32:     0x7f19a3a88f11 - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::as_call_operand
  33:     0x7f19a3a89516 - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::as_call_operand
  34:     0x7f19a3f0de24 - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::expr_into_dest
  35:     0x7f19a3855d7a - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::as_temp::{closure#0}
  36:     0x7f19a385432e - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::as_operand
  37:     0x7f19a3854010 - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::as_operand
  38:     0x7f19a3ca783d - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::as_rvalue
  39:     0x7f19a3f0d4cd - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::expr_into_dest
  40:     0x7f19a3855d7a - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::as_temp::{closure#0}
  41:     0x7f19a3ccbbd7 - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::expr_as_place
  42:     0x7f19a3ccc0c9 - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::expr_as_place
  43:     0x7f19a3f0dafb - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::expr_into_dest
  44:     0x7f19a3855d7a - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::as_temp::{closure#0}
  45:     0x7f19a3ccbbd7 - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::expr_as_place
  46:     0x7f19a3ccba7a - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::expr_as_place
  47:     0x7f19a3f0dafb - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::expr_into_dest
  48:     0x7f19a3855d7a - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::as_temp::{closure#0}
  49:     0x7f19a385432e - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::as_operand
  50:     0x7f19a3ca759c - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::as_rvalue
  51:     0x7f19a3f0d4cd - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::expr_into_dest
  52:     0x7f19a3855d7a - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::as_temp::{closure#0}
  53:     0x7f19a385432e - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::as_operand
  54:     0x7f19a3a88f11 - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::as_call_operand
  55:     0x7f19a3a89516 - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::as_call_operand
  56:     0x7f19a3f0de24 - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::expr_into_dest
  57:     0x7f19a3855d7a - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::as_temp::{closure#0}
  58:     0x7f19a385432e - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::as_operand
  59:     0x7f19a3a88f11 - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::as_call_operand
  60:     0x7f19a3a89516 - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::as_call_operand
  61:     0x7f19a3f0de24 - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::expr_into_dest
  62:     0x7f19a3f0f24d - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::expr_into_dest
  63:     0x7f19a0b0a040 - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::ast_block_stmts
  64:     0x7f19a3f0e2bd - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::expr_into_dest
  65:     0x7f19a3f0f24d - <rustc_mir_build[d6b8fa08231a903]::build::Builder>::expr_into_dest
  66:     0x7f19a4020783 - rustc_mir_build[d6b8fa08231a903]::build::mir_build::{closure#0}
  67:     0x7f19a3bb7e03 - rustc_mir_build[d6b8fa08231a903]::build::mir_built
  68:     0x7f19a3bb7ae9 - rustc_query_impl[68c32b4957ad6a92]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[68c32b4957ad6a92]::query_impl::mir_built::dynamic_query::{closure#2}::{closure#0}, rustc_middle[5870770f105feed]::query::erase::Erased<[u8; 8usize]>>
  69:     0x7f19a3986fbb - rustc_query_system[ecea68d83bd58356]::query::plumbing::try_execute_query::<rustc_query_impl[68c32b4957ad6a92]::DynamicConfig<rustc_query_system[ecea68d83bd58356]::query::caches::VecCache<rustc_span[68562dd5edd39f62]::def_id::LocalDefId, rustc_middle[5870770f105feed]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[68c32b4957ad6a92]::plumbing::QueryCtxt, false>
  70:     0x7f19a3986a0c - rustc_query_impl[68c32b4957ad6a92]::query_impl::mir_built::get_query_non_incr::__rust_end_short_backtrace
  71:     0x7f19a3c594de - rustc_mir_build[d6b8fa08231a903]::check_unsafety::check_unsafety
  72:     0x7f19a3c592f3 - rustc_query_impl[68c32b4957ad6a92]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[68c32b4957ad6a92]::query_impl::check_unsafety::dynamic_query::{closure#2}::{closure#0}, rustc_middle[5870770f105feed]::query::erase::Erased<[u8; 0usize]>>
  73:     0x7f19a3bb71db - rustc_query_system[ecea68d83bd58356]::query::plumbing::try_execute_query::<rustc_query_impl[68c32b4957ad6a92]::DynamicConfig<rustc_query_system[ecea68d83bd58356]::query::caches::VecCache<rustc_span[68562dd5edd39f62]::def_id::LocalDefId, rustc_middle[5870770f105feed]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[68c32b4957ad6a92]::plumbing::QueryCtxt, false>
  74:     0x7f19a3bb6ebf - rustc_query_impl[68c32b4957ad6a92]::query_impl::check_unsafety::get_query_non_incr::__rust_end_short_backtrace
  75:     0x7f19a44f1f82 - rustc_interface[79f83bc025fc4d7f]::passes::analysis
  76:     0x7f19a44f19d9 - rustc_query_impl[68c32b4957ad6a92]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[68c32b4957ad6a92]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[5870770f105feed]::query::erase::Erased<[u8; 1usize]>>
  77:     0x7f19a459a7e5 - rustc_query_system[ecea68d83bd58356]::query::plumbing::try_execute_query::<rustc_query_impl[68c32b4957ad6a92]::DynamicConfig<rustc_query_system[ecea68d83bd58356]::query::caches::SingleCache<rustc_middle[5870770f105feed]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[68c32b4957ad6a92]::plumbing::QueryCtxt, false>
  78:     0x7f19a459a549 - rustc_query_impl[68c32b4957ad6a92]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  79:     0x7f19a45a99ef - rustc_interface[79f83bc025fc4d7f]::interface::run_compiler::<core[9ad5ca1534623343]::result::Result<(), rustc_span[68562dd5edd39f62]::ErrorGuaranteed>, rustc_driver_impl[bdf94cba6429e3e9]::run_compiler::{closure#0}>::{closure#0}
  80:     0x7f19a47cb805 - std[d016f499f7096d82]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[79f83bc025fc4d7f]::util::run_in_thread_with_globals<rustc_interface[79f83bc025fc4d7f]::util::run_in_thread_pool_with_globals<rustc_interface[79f83bc025fc4d7f]::interface::run_compiler<core[9ad5ca1534623343]::result::Result<(), rustc_span[68562dd5edd39f62]::ErrorGuaranteed>, rustc_driver_impl[bdf94cba6429e3e9]::run_compiler::{closure#0}>::{closure#0}, core[9ad5ca1534623343]::result::Result<(), rustc_span[68562dd5edd39f62]::ErrorGuaranteed>>::{closure#0}, core[9ad5ca1534623343]::result::Result<(), rustc_span[68562dd5edd39f62]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[9ad5ca1534623343]::result::Result<(), rustc_span[68562dd5edd39f62]::ErrorGuaranteed>>
  81:     0x7f19a47cb632 - <<std[d016f499f7096d82]::thread::Builder>::spawn_unchecked_<rustc_interface[79f83bc025fc4d7f]::util::run_in_thread_with_globals<rustc_interface[79f83bc025fc4d7f]::util::run_in_thread_pool_with_globals<rustc_interface[79f83bc025fc4d7f]::interface::run_compiler<core[9ad5ca1534623343]::result::Result<(), rustc_span[68562dd5edd39f62]::ErrorGuaranteed>, rustc_driver_impl[bdf94cba6429e3e9]::run_compiler::{closure#0}>::{closure#0}, core[9ad5ca1534623343]::result::Result<(), rustc_span[68562dd5edd39f62]::ErrorGuaranteed>>::{closure#0}, core[9ad5ca1534623343]::result::Result<(), rustc_span[68562dd5edd39f62]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[9ad5ca1534623343]::result::Result<(), rustc_span[68562dd5edd39f62]::ErrorGuaranteed>>::{closure#1} as core[9ad5ca1534623343]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  82:     0x7f19a581c3e5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::ha1018986c04ed39c
                               at /rustc/8401645716b26a8b4c6974dc0680e55e81e9e8a1/library/alloc/src/boxed.rs:2020:9
  83:     0x7f19a581c3e5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h785b54a9e46f4626
                               at /rustc/8401645716b26a8b4c6974dc0680e55e81e9e8a1/library/alloc/src/boxed.rs:2020:9
  84:     0x7f19a581c3e5 - std::sys::pal::unix::thread::Thread::new::thread_start::h3c9c1af568b2e82b
                               at /rustc/8401645716b26a8b4c6974dc0680e55e81e9e8a1/library/std/src/sys/pal/unix/thread.rs:108:17
  85:     0x7f199f4a955a - <unknown>
  86:     0x7f199f526a3c - <unknown>
  87:                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 1.78.0-nightly (840164571 2024-03-09) running on x86_64-unknown-linux-gnu

query stack during panic:
#0 [mir_built] building MIR for `<impl at /tmp/icemaker_global_tempdir.Dod2gYKM516h/rustc_testrunner_tmpdir_reporting.txW3v63cD0Q3/mvce.rs:15:1: 15:24>::fmt`
#1 [check_unsafety] unsafety-checking `<impl at /tmp/icemaker_global_tempdir.Dod2gYKM516h/rustc_testrunner_tmpdir_reporting.txW3v63cD0Q3/mvce.rs:15:1: 15:24>::fmt`
#2 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to 10 previous errors

Some errors have detailed explanations: E0204, E0277, E0308, E0369, E0601.
For more information about an error, try `rustc --explain E0204`.

[matthiaskrgr]

#120847 cc @oli-obk
original file was compiler/rustc_hir/src/target.rs

[compiler-errors]

Minimal:

#![feature(unsized_fn_params)]

#[derive(Copy, Clone)]
struct Target(str);

fn w(t: &Target) {
    x(*t);
}

fn x(t: Target) {}