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dyn* to -> impl Trait ICE's #102459

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DutchGhost opened this issue Sep 29, 2022 · 1 comment
Closed

dyn* to -> impl Trait ICE's #102459

DutchGhost opened this issue Sep 29, 2022 · 1 comment
Labels
C-bug Category: This is a bug. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.

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@DutchGhost
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DutchGhost commented Sep 29, 2022 •
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Code

#![feature(dyn_star)]
#![allow(incomplete_features)]

use std::fmt::Display;

fn bug() -> impl Display {
    // This reference seems to be evil.
    // `1 as dyn* Display` compiles fine!
    &1 as dyn* Display
}

fn main() {
    let x = bug();

    println!("{x}");
}

Meta

rustc --version --verbose:

rustc 1.66.0-nightly (ce7f0f1aa 2022-09-28)

Error output

thread 'rustc' panicked at 'assertion failed: bx.cx().is_backend_immediate(cast)', /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/compiler/rustc_codegen_ssa/src/mir/rvalue.rs:298:25
Backtrace 

   Compiling playground v0.0.1 (/playground)
thread 'rustc' panicked at 'assertion failed: bx.cx().is_backend_immediate(cast)', /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/compiler/rustc_codegen_ssa/src/mir/rvalue.rs:298:25
stack backtrace:
   0:     0x7f382805e170 - std::backtrace_rs::backtrace::libunwind::trace::hac9b0f7f9661e748
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   1:     0x7f382805e170 - std::backtrace_rs::backtrace::trace_unsynchronized::hc44795987fc42d34
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f382805e170 - std::sys_common::backtrace::_print_fmt::h11541e17c3fc86a7
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/sys_common/backtrace.rs:66:5
   3:     0x7f382805e170 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hc17ff1666cc882db
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/sys_common/backtrace.rs:45:22
   4:     0x7f38280b8e2e - core::fmt::write::h55fcab10ae826150
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/core/src/fmt/mod.rs:1209:17
   5:     0x7f382804edb5 - std::io::Write::write_fmt::hf963d6d18d14f181
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/io/mod.rs:1679:15
   6:     0x7f3828060ef3 - std::sys_common::backtrace::_print::h994ce2c0e5b405c8
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/sys_common/backtrace.rs:48:5
   7:     0x7f3828060ef3 - std::sys_common::backtrace::print::hcc56026dcd969e04
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/sys_common/backtrace.rs:35:9
   8:     0x7f3828060ef3 - std::panicking::default_hook::{{closure}}::h88f2c5d855241086
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/panicking.rs:267:22
   9:     0x7f3828060bdf - std::panicking::default_hook::h8c95d81babfc3452
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/panicking.rs:286:9
  10:     0x7f382a896801 - rustc_driver[b4131074c7377c18]::DEFAULT_HOOK::{closure#0}::{closure#0}
  11:     0x7f382806172b - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h67c5cbe4132c274b
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/alloc/src/boxed.rs:1952:9
  12:     0x7f382806172b - std::panicking::rust_panic_with_hook::h60207dae86acc93c
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/panicking.rs:673:13
  13:     0x7f3828061541 - std::panicking::begin_panic_handler::{{closure}}::h417b25e282e7bdd0
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/panicking.rs:558:13
  14:     0x7f382805e61c - std::sys_common::backtrace::__rust_end_short_backtrace::hed3dc7a8acb54b37
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/sys_common/backtrace.rs:138:18
  15:     0x7f38280612a2 - rust_begin_unwind
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/panicking.rs:556:5
  16:     0x7f38280b5a03 - core::panicking::panic_fmt::h33353e845faa36b7
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/core/src/panicking.rs:142:14
  17:     0x7f38280b584d - core::panicking::panic::hd7761ecf6f9e50e5
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/core/src/panicking.rs:48:5
  18:     0x7f38297e8754 - <rustc_codegen_ssa[d2b69af56ae265d2]::mir::FunctionCx<rustc_codegen_llvm[d08276be3b0a586e]::builder::Builder>>::codegen_block
  19:     0x7f38297d71a6 - rustc_codegen_ssa[d2b69af56ae265d2]::mir::codegen_mir::<rustc_codegen_llvm[d08276be3b0a586e]::builder::Builder>
  20:     0x7f3829c7d754 - rustc_codegen_llvm[d08276be3b0a586e]::base::compile_codegen_unit::module_codegen
  21:     0x7f382a599c17 - <rustc_query_system[1ae1527ce801643f]::dep_graph::graph::DepGraph<rustc_middle[c8d33145a5f03cc8]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[c8d33145a5f03cc8]::ty::context::TyCtxt, rustc_span[a9093c78adc8a30e]::symbol::Symbol, rustc_codegen_ssa[d2b69af56ae265d2]::ModuleCodegen<rustc_codegen_llvm[d08276be3b0a586e]::ModuleLlvm>>
  22:     0x7f382a599a19 - rustc_codegen_llvm[d08276be3b0a586e]::base::compile_codegen_unit
  23:     0x7f382a37c26d - rustc_codegen_ssa[d2b69af56ae265d2]::base::codegen_crate::<rustc_codegen_llvm[d08276be3b0a586e]::LlvmCodegenBackend>
  24:     0x7f382a37ba6d - <rustc_codegen_llvm[d08276be3b0a586e]::LlvmCodegenBackend as rustc_codegen_ssa[d2b69af56ae265d2]::traits::backend::CodegenBackend>::codegen_crate
  25:     0x7f38296b383c - <rustc_session[d3255eaf8224a584]::session::Session>::time::<alloc[c8bb264001a6b8ff]::boxed::Box<dyn core[de81bf0691074480]::any::Any>, rustc_interface[f0f2c906f605917e]::passes::start_codegen::{closure#0}>
  26:     0x7f38296b321e - <rustc_interface[f0f2c906f605917e]::passes::QueryContext>::enter::<<rustc_interface[f0f2c906f605917e]::queries::Queries>::ongoing_codegen::{closure#0}::{closure#0}, core[de81bf0691074480]::result::Result<alloc[c8bb264001a6b8ff]::boxed::Box<dyn core[de81bf0691074480]::any::Any>, rustc_errors[6dd3b64aee5d90d7]::ErrorGuaranteed>>
  27:     0x7f3829673093 - <rustc_interface[f0f2c906f605917e]::queries::Queries>::ongoing_codegen
  28:     0x7f382967133a - rustc_interface[f0f2c906f605917e]::interface::create_compiler_and_run::<core[de81bf0691074480]::result::Result<(), rustc_errors[6dd3b64aee5d90d7]::ErrorGuaranteed>, rustc_driver[b4131074c7377c18]::run_compiler::{closure#1}>
  29:     0x7f382966fc41 - <scoped_tls[77ed516bf348563d]::ScopedKey<rustc_span[a9093c78adc8a30e]::SessionGlobals>>::set::<rustc_interface[f0f2c906f605917e]::interface::run_compiler<core[de81bf0691074480]::result::Result<(), rustc_errors[6dd3b64aee5d90d7]::ErrorGuaranteed>, rustc_driver[b4131074c7377c18]::run_compiler::{closure#1}>::{closure#0}, core[de81bf0691074480]::result::Result<(), rustc_errors[6dd3b64aee5d90d7]::ErrorGuaranteed>>
  30:     0x7f382966f92f - std[1bac5bf8d99344e6]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[f0f2c906f605917e]::util::run_in_thread_pool_with_globals<rustc_interface[f0f2c906f605917e]::interface::run_compiler<core[de81bf0691074480]::result::Result<(), rustc_errors[6dd3b64aee5d90d7]::ErrorGuaranteed>, rustc_driver[b4131074c7377c18]::run_compiler::{closure#1}>::{closure#0}, core[de81bf0691074480]::result::Result<(), rustc_errors[6dd3b64aee5d90d7]::ErrorGuaranteed>>::{closure#0}, core[de81bf0691074480]::result::Result<(), rustc_errors[6dd3b64aee5d90d7]::ErrorGuaranteed>>
  31:     0x7f382a6f8600 - <<std[1bac5bf8d99344e6]::thread::Builder>::spawn_unchecked_<rustc_interface[f0f2c906f605917e]::util::run_in_thread_pool_with_globals<rustc_interface[f0f2c906f605917e]::interface::run_compiler<core[de81bf0691074480]::result::Result<(), rustc_errors[6dd3b64aee5d90d7]::ErrorGuaranteed>, rustc_driver[b4131074c7377c18]::run_compiler::{closure#1}>::{closure#0}, core[de81bf0691074480]::result::Result<(), rustc_errors[6dd3b64aee5d90d7]::ErrorGuaranteed>>::{closure#0}, core[de81bf0691074480]::result::Result<(), rustc_errors[6dd3b64aee5d90d7]::ErrorGuaranteed>>::{closure#1} as core[de81bf0691074480]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  32:     0x7f382806b393 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hd5e3cab38cec9739
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/alloc/src/boxed.rs:1938:9
  33:     0x7f382806b393 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h970a034a5216df96
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/alloc/src/boxed.rs:1938:9
  34:     0x7f382806b393 - std::sys::unix::thread::Thread::new::thread_start::h19f111f22a37ea01
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/sys/unix/thread.rs:108:17
  35:     0x7f3827f3e609 - start_thread
  36:     0x7f3827e61133 - clone
  37:                0x0 - <unknown>

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 1.66.0-nightly (ce7f0f1aa 2022-09-28) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type bin -C embed-bitcode=no -C codegen-units=1 -C debuginfo=2

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

query stack during panic:
end of query stack
error: internal compiler error: no errors encountered even though `delay_span_bug` issued

error: internal compiler error: broken MIR in DefId(0:6 ~ playground[53a0]::bug) (move _2 as dyn* std::fmt::Display (Pointer(ArrayToPointer))): ArrayToPointer cast from unexpected type &i32
 --> src/main.rs:7:5
  |
7 |     &1 as dyn* Display
  |     ^^^^^^^^^^^^^^^^^^
  |
  = note: delayed at compiler/rustc_borrowck/src/type_check/mod.rs:2125:29

thread 'rustc' panicked at 'Box<dyn Any>', compiler/rustc_errors/src/lib.rs:1530:13
stack backtrace:
   0:     0x7f382805e170 - std::backtrace_rs::backtrace::libunwind::trace::hac9b0f7f9661e748
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   1:     0x7f382805e170 - std::backtrace_rs::backtrace::trace_unsynchronized::hc44795987fc42d34
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f382805e170 - std::sys_common::backtrace::_print_fmt::h11541e17c3fc86a7
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/sys_common/backtrace.rs:66:5
   3:     0x7f382805e170 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hc17ff1666cc882db
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/sys_common/backtrace.rs:45:22
   4:     0x7f38280b8e2e - core::fmt::write::h55fcab10ae826150
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/core/src/fmt/mod.rs:1209:17
   5:     0x7f382804edb5 - std::io::Write::write_fmt::hf963d6d18d14f181
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/io/mod.rs:1679:15
   6:     0x7f3828060ef3 - std::sys_common::backtrace::_print::h994ce2c0e5b405c8
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/sys_common/backtrace.rs:48:5
   7:     0x7f3828060ef3 - std::sys_common::backtrace::print::hcc56026dcd969e04
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/sys_common/backtrace.rs:35:9
   8:     0x7f3828060ef3 - std::panicking::default_hook::{{closure}}::h88f2c5d855241086
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/panicking.rs:267:22
   9:     0x7f3828060bdf - std::panicking::default_hook::h8c95d81babfc3452
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/panicking.rs:286:9
  10:     0x7f382a896801 - rustc_driver[b4131074c7377c18]::DEFAULT_HOOK::{closure#0}::{closure#0}
  11:     0x7f382806172b - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h67c5cbe4132c274b
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/alloc/src/boxed.rs:1952:9
  12:     0x7f382806172b - std::panicking::rust_panic_with_hook::h60207dae86acc93c
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/panicking.rs:673:13
  13:     0x7f382b9af701 - std[1bac5bf8d99344e6]::panicking::begin_panic::<rustc_errors[6dd3b64aee5d90d7]::ExplicitBug>::{closure#0}
  14:     0x7f382b9ae026 - std[1bac5bf8d99344e6]::sys_common::backtrace::__rust_end_short_backtrace::<std[1bac5bf8d99344e6]::panicking::begin_panic<rustc_errors[6dd3b64aee5d90d7]::ExplicitBug>::{closure#0}, !>
  15:     0x7f382b9a7fb6 - std[1bac5bf8d99344e6]::panicking::begin_panic::<rustc_errors[6dd3b64aee5d90d7]::ExplicitBug>
  16:     0x7f382b9aa7d6 - std[1bac5bf8d99344e6]::panic::panic_any::<rustc_errors[6dd3b64aee5d90d7]::ExplicitBug>
  17:     0x7f382a4031c8 - <rustc_errors[6dd3b64aee5d90d7]::HandlerInner as core[de81bf0691074480]::ops::drop::Drop>::drop
  18:     0x7f38296b9468 - core[de81bf0691074480]::ptr::drop_in_place::<rustc_session[d3255eaf8224a584]::parse::ParseSess>
  19:     0x7f38296773b8 - <alloc[c8bb264001a6b8ff]::rc::Rc<rustc_session[d3255eaf8224a584]::session::Session> as core[de81bf0691074480]::ops::drop::Drop>::drop
  20:     0x7f382967408d - core[de81bf0691074480]::ptr::drop_in_place::<rustc_interface[f0f2c906f605917e]::interface::Compiler>
  21:     0x7f3829672144 - rustc_interface[f0f2c906f605917e]::interface::create_compiler_and_run::<core[de81bf0691074480]::result::Result<(), rustc_errors[6dd3b64aee5d90d7]::ErrorGuaranteed>, rustc_driver[b4131074c7377c18]::run_compiler::{closure#1}>
  22:     0x7f382966fc41 - <scoped_tls[77ed516bf348563d]::ScopedKey<rustc_span[a9093c78adc8a30e]::SessionGlobals>>::set::<rustc_interface[f0f2c906f605917e]::interface::run_compiler<core[de81bf0691074480]::result::Result<(), rustc_errors[6dd3b64aee5d90d7]::ErrorGuaranteed>, rustc_driver[b4131074c7377c18]::run_compiler::{closure#1}>::{closure#0}, core[de81bf0691074480]::result::Result<(), rustc_errors[6dd3b64aee5d90d7]::ErrorGuaranteed>>
  23:     0x7f382966f92f - std[1bac5bf8d99344e6]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[f0f2c906f605917e]::util::run_in_thread_pool_with_globals<rustc_interface[f0f2c906f605917e]::interface::run_compiler<core[de81bf0691074480]::result::Result<(), rustc_errors[6dd3b64aee5d90d7]::ErrorGuaranteed>, rustc_driver[b4131074c7377c18]::run_compiler::{closure#1}>::{closure#0}, core[de81bf0691074480]::result::Result<(), rustc_errors[6dd3b64aee5d90d7]::ErrorGuaranteed>>::{closure#0}, core[de81bf0691074480]::result::Result<(), rustc_errors[6dd3b64aee5d90d7]::ErrorGuaranteed>>
  24:     0x7f382a6f8600 - <<std[1bac5bf8d99344e6]::thread::Builder>::spawn_unchecked_<rustc_interface[f0f2c906f605917e]::util::run_in_thread_pool_with_globals<rustc_interface[f0f2c906f605917e]::interface::run_compiler<core[de81bf0691074480]::result::Result<(), rustc_errors[6dd3b64aee5d90d7]::ErrorGuaranteed>, rustc_driver[b4131074c7377c18]::run_compiler::{closure#1}>::{closure#0}, core[de81bf0691074480]::result::Result<(), rustc_errors[6dd3b64aee5d90d7]::ErrorGuaranteed>>::{closure#0}, core[de81bf0691074480]::result::Result<(), rustc_errors[6dd3b64aee5d90d7]::ErrorGuaranteed>>::{closure#1} as core[de81bf0691074480]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  25:     0x7f382806b393 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hd5e3cab38cec9739
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/alloc/src/boxed.rs:1938:9
  26:     0x7f382806b393 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h970a034a5216df96
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/alloc/src/boxed.rs:1938:9
  27:     0x7f382806b393 - std::sys::unix::thread::Thread::new::thread_start::h19f111f22a37ea01
                               at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/sys/unix/thread.rs:108:17
  28:     0x7f3827f3e609 - start_thread
  29:     0x7f3827e61133 - clone
  30:                0x0 - <unknown>

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 1.66.0-nightly (ce7f0f1aa 2022-09-28) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type bin -C embed-bitcode=no -C codegen-units=1 -C debuginfo=2

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

query stack during panic:
end of query stack
thread panicked while panicking. aborting.
error: could not compile `playground`

@DutchGhost DutchGhost added C-bug Category: This is a bug. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Sep 29, 2022
@DutchGhost
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Oh, is a dupe of #102430, but with a smaller test case.

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