problem compiling this code

[neyb]

Code

trait MyIterTools {
    type Element;

    fn split<Splitter>(self, splitter: Splitter) -> SplitIterator<Self::Element, Self, Splitter>
    where
        Splitter: Fn(&Self::Item) -> bool,
        Self: Iterator<Item = Self::Element> + Sized;
}

impl<T> MyIterTools for dyn Iterator<Item = T> {
    type Element = T;

    fn split<Splitter>(self, splitter: Splitter) -> SplitIterator<Self::Element, Self, Splitter>
    where
        Splitter: Fn(&T) -> bool,
        Self: Iterator + Sized,
    {
        SplitIterator::new(self, splitter)
    }
}
pub struct SplitIterator<T, It, Splitter>
where
    It: Iterator<Item = T>,
    Splitter: Fn(&T) -> bool,
{
    inner: It,
    splitter: Splitter,
}

impl<T, It, Splitter> SplitIterator<T, It, Splitter>
where
    It: Iterator<Item = T>,
    Splitter: Fn(&T) -> bool,
{
    pub fn new(inner: It, splitter: Splitter) -> Self
    where
        It: Iterator<Item = T> + Sized,
        Splitter: Fn(&T) -> bool + Sized,
    {
        Self { inner, splitter }
    }
}

impl<T, It, Splitter> Iterator for SplitIterator<T, It, Splitter>
where
    It: Iterator<Item = T>,
    Splitter: Fn(&T) -> bool,
{
    type Item = Vec<T>;

    fn next(&mut self) -> Option<Self::Item> {
        let mut result = None;
        while let Some(item) = self.inner.next() {
            if !(self.splitter)(&item) {
                result.get_or_insert_with(Vec::new).push(item);
            } else {
                break;
            }
        }
        result
    }
}

Meta

rustc --version --verbose:

rustc 1.65.0 (897e37553 2022-11-02)
binary: rustc
commit-hash: 897e37553bba8b42751c67658967889d11ecd120
commit-date: 2022-11-02
host: x86_64-unknown-linux-gnu
release: 1.65.0
LLVM version: 15.0.0

Error output

bugged on  master [?] is 📦 v0.1.0 via 🦀 v1.65.0 
❯ cargo build
   Compiling bugged v0.1.0 (/home/alban/dev/perso/bugged)
thread 'rustc' panicked at 'cannot copy unsized immediates', /rustc/897e37553bba8b42751c67658967889d11ecd120/compiler/rustc_const_eval/src/interpret/place.rs:643:17
backtrace... (see further)

error: internal compiler error: unexpected panic

note: 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 1.65.0 (897e37553 2022-11-02) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type lib -C embed-bitcode=no -C debuginfo=2 -C incremental=[REDACTED]

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

query stack during panic:
#0 [mir_drops_elaborated_and_const_checked] elaborating drops for `<impl at src/lib.rs:10:1: 10:47>::split`
#1 [optimized_mir] optimizing MIR for `<impl at src/lib.rs:10:1: 10:47>::split`
end of query stack
error: could not compile `bugged`

Backtrace

stack backtrace:
   0:     0x7fb580b1dd40 - std::backtrace_rs::backtrace::libunwind::trace::h32eb3e08e874dd27
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7fb580b1dd40 - std::backtrace_rs::backtrace::trace_unsynchronized::haa3f451d27bc11a5
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7fb580b1dd40 - std::sys_common::backtrace::_print_fmt::h5b94a01bb4289bb5
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/sys_common/backtrace.rs:66:5
   3:     0x7fb580b1dd40 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hb070b7fa7e3175df
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/sys_common/backtrace.rs:45:22
   4:     0x7fb580b78bfe - core::fmt::write::hd5207aebbb9a86e9
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/core/src/fmt/mod.rs:1202:17
   5:     0x7fb580b0e935 - std::io::Write::write_fmt::h3bd699bbd129ab8a
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/io/mod.rs:1679:15
   6:     0x7fb580b209f3 - std::sys_common::backtrace::_print::h7a21be552fdf58da
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/sys_common/backtrace.rs:48:5
   7:     0x7fb580b209f3 - std::sys_common::backtrace::print::ha85c41fe4dd80b13
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/sys_common/backtrace.rs:35:9
   8:     0x7fb580b209f3 - std::panicking::default_hook::{{closure}}::h04cca40023d0eeca
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/panicking.rs:295:22
   9:     0x7fb580b206df - std::panicking::default_hook::haa3ca8c310ed5402
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/panicking.rs:314:9
  10:     0x7fb57f59e2e1 - rustc_driver[cfb34b1539811fe8]::DEFAULT_HOOK::{closure#0}::{closure#0}
  11:     0x7fb580b2122d - std::panicking::rust_panic_with_hook::h7b190ce1a948faac
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/panicking.rs:702:17
  12:     0x7fb580b21041 - std::panicking::begin_panic_handler::{{closure}}::hbafbfdc3e1b97f68
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/panicking.rs:586:13
  13:     0x7fb580b1e1ec - std::sys_common::backtrace::__rust_end_short_backtrace::hda93e5fef243b4c0
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/sys_common/backtrace.rs:138:18
  14:     0x7fb580b20da2 - rust_begin_unwind
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/panicking.rs:584:5
  15:     0x7fb580b757d3 - core::panicking::panic_fmt::h8d17ca1073d9a733
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/core/src/panicking.rs:142:14
  16:     0x7fb57ebfba43 - <rustc_const_eval[591cdca0970fa8cd]::interpret::eval_context::InterpCx<rustc_mir_transform[de1f68ec5b9668bc]::const_prop::ConstPropMachine>>::eval_rvalue_into_place
  17:     0x7fb57e98b97a - <rustc_mir_transform[de1f68ec5b9668bc]::const_prop_lint::ConstPropagator as rustc_middle[a9ca1c3f9fd197cd]::mir::visit::Visitor>::visit_body
  18:     0x7fb57e983493 - <rustc_mir_transform[de1f68ec5b9668bc]::const_prop_lint::ConstProp as rustc_mir_transform[de1f68ec5b9668bc]::pass_manager::MirLint>::run_lint
  19:     0x7fb57e090385 - rustc_mir_transform[de1f68ec5b9668bc]::pass_manager::run_passes_no_validate
  20:     0x7fb57e08d614 - rustc_mir_transform[de1f68ec5b9668bc]::run_analysis_to_runtime_passes
  21:     0x7fb57e08c632 - rustc_mir_transform[de1f68ec5b9668bc]::mir_drops_elaborated_and_const_checked
  22:     0x7fb57eb15ec8 - <rustc_query_system[860ed7b39cdfb46b]::dep_graph::graph::DepGraph<rustc_middle[a9ca1c3f9fd197cd]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[a9ca1c3f9fd197cd]::ty::context::TyCtxt, rustc_middle[a9ca1c3f9fd197cd]::ty::WithOptConstParam<rustc_span[8f00505efff112e2]::def_id::LocalDefId>, &rustc_data_structures[62ce3989ce8140ee]::steal::Steal<rustc_middle[a9ca1c3f9fd197cd]::mir::Body>>
  23:     0x7fb57eb14d62 - rustc_query_system[860ed7b39cdfb46b]::query::plumbing::try_execute_query::<rustc_query_impl[d6191eea714bd250]::plumbing::QueryCtxt, rustc_query_system[860ed7b39cdfb46b]::query::caches::DefaultCache<rustc_middle[a9ca1c3f9fd197cd]::ty::WithOptConstParam<rustc_span[8f00505efff112e2]::def_id::LocalDefId>, &rustc_data_structures[62ce3989ce8140ee]::steal::Steal<rustc_middle[a9ca1c3f9fd197cd]::mir::Body>>>
  24:     0x7fb57f4d932e - <rustc_query_impl[d6191eea714bd250]::Queries as rustc_middle[a9ca1c3f9fd197cd]::ty::query::QueryEngine>::mir_drops_elaborated_and_const_checked
  25:     0x7fb57e0d424b - rustc_mir_transform[de1f68ec5b9668bc]::optimized_mir
  26:     0x7fb57e9ec277 - <rustc_query_system[860ed7b39cdfb46b]::dep_graph::graph::DepGraph<rustc_middle[a9ca1c3f9fd197cd]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[a9ca1c3f9fd197cd]::ty::context::TyCtxt, rustc_span[8f00505efff112e2]::def_id::DefId, &rustc_middle[a9ca1c3f9fd197cd]::mir::Body>
  27:     0x7fb57e9d7ec2 - rustc_query_system[860ed7b39cdfb46b]::query::plumbing::try_execute_query::<rustc_query_impl[d6191eea714bd250]::plumbing::QueryCtxt, rustc_query_system[860ed7b39cdfb46b]::query::caches::DefaultCache<rustc_span[8f00505efff112e2]::def_id::DefId, &rustc_middle[a9ca1c3f9fd197cd]::mir::Body>>
  28:     0x7fb57f4d971f - <rustc_query_impl[d6191eea714bd250]::Queries as rustc_middle[a9ca1c3f9fd197cd]::ty::query::QueryEngine>::optimized_mir
  29:     0x7fb57e92a022 - <rustc_metadata[d8be3da67d4a4339]::rmeta::encoder::EncodeContext>::encode_crate_root
  30:     0x7fb57e4bac42 - rustc_metadata[d8be3da67d4a4339]::rmeta::encoder::encode_metadata_impl
  31:     0x7fb57e49d64e - rustc_data_structures[62ce3989ce8140ee]::sync::join::<rustc_metadata[d8be3da67d4a4339]::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata[d8be3da67d4a4339]::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
  32:     0x7fb57e49d539 - rustc_metadata[d8be3da67d4a4339]::rmeta::encoder::encode_metadata
  33:     0x7fb57e49c623 - rustc_metadata[d8be3da67d4a4339]::fs::encode_and_write_metadata
  34:     0x7fb57e490342 - <rustc_interface[3182dd864eff9d7d]::passes::QueryContext>::enter::<<rustc_interface[3182dd864eff9d7d]::queries::Queries>::ongoing_codegen::{closure#0}::{closure#0}, core[8c92e53db3fc2eaa]::result::Result<alloc[188ed69dc0d14b4b]::boxed::Box<dyn core[8c92e53db3fc2eaa]::any::Any>, rustc_errors[f77a66b68db622d5]::ErrorGuaranteed>>
  35:     0x7fb57e44fe73 - <rustc_interface[3182dd864eff9d7d]::queries::Queries>::ongoing_codegen
  36:     0x7fb57e44e2ca - rustc_interface[3182dd864eff9d7d]::interface::create_compiler_and_run::<core[8c92e53db3fc2eaa]::result::Result<(), rustc_errors[f77a66b68db622d5]::ErrorGuaranteed>, rustc_driver[cfb34b1539811fe8]::run_compiler::{closure#1}>
  37:     0x7fb57e44cac1 - <scoped_tls[e395fa6e23b19669]::ScopedKey<rustc_span[8f00505efff112e2]::SessionGlobals>>::set::<rustc_interface[3182dd864eff9d7d]::interface::run_compiler<core[8c92e53db3fc2eaa]::result::Result<(), rustc_errors[f77a66b68db622d5]::ErrorGuaranteed>, rustc_driver[cfb34b1539811fe8]::run_compiler::{closure#1}>::{closure#0}, core[8c92e53db3fc2eaa]::result::Result<(), rustc_errors[f77a66b68db622d5]::ErrorGuaranteed>>
  38:     0x7fb57e44c7af - std[71cb4861428b0c25]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[3182dd864eff9d7d]::util::run_in_thread_pool_with_globals<rustc_interface[3182dd864eff9d7d]::interface::run_compiler<core[8c92e53db3fc2eaa]::result::Result<(), rustc_errors[f77a66b68db622d5]::ErrorGuaranteed>, rustc_driver[cfb34b1539811fe8]::run_compiler::{closure#1}>::{closure#0}, core[8c92e53db3fc2eaa]::result::Result<(), rustc_errors[f77a66b68db622d5]::ErrorGuaranteed>>::{closure#0}, core[8c92e53db3fc2eaa]::result::Result<(), rustc_errors[f77a66b68db622d5]::ErrorGuaranteed>>
  39:     0x7fb57f401d70 - <<std[71cb4861428b0c25]::thread::Builder>::spawn_unchecked_<rustc_interface[3182dd864eff9d7d]::util::run_in_thread_pool_with_globals<rustc_interface[3182dd864eff9d7d]::interface::run_compiler<core[8c92e53db3fc2eaa]::result::Result<(), rustc_errors[f77a66b68db622d5]::ErrorGuaranteed>, rustc_driver[cfb34b1539811fe8]::run_compiler::{closure#1}>::{closure#0}, core[8c92e53db3fc2eaa]::result::Result<(), rustc_errors[f77a66b68db622d5]::ErrorGuaranteed>>::{closure#0}, core[8c92e53db3fc2eaa]::result::Result<(), rustc_errors[f77a66b68db622d5]::ErrorGuaranteed>>::{closure#1} as core[8c92e53db3fc2eaa]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  40:     0x7fb580b2b003 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h49f797984e2121bf
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/alloc/src/boxed.rs:1940:9
  41:     0x7fb580b2b003 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hfa4f3d0ee6440e0b
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/alloc/src/boxed.rs:1940:9
  42:     0x7fb580b2b003 - std::sys::unix::thread::Thread::new::thread_start::h62ca48b42d48a8fc
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/sys/unix/thread.rs:108:17
  43:     0x7fb57cc828fd - <unknown>
  44:     0x7fb57cd04a60 - <unknown>
  45:                0x0 - <unknown>

[neyb]

same bug on 1.67.0

[Noratrieb]

I cannot reproduce your example on the playground beta and nightly, only on stable. This looks similar to #102553, which was fixed already.

[neyb]

ok I don't what i did but nightly is fine... closing. Sorry