Internal Compiler Error

[antiphoton]

Code

Rust playground

use async_trait::async_trait;

pub trait MySend: Send {}
impl<T: Send> MySend for T {}

pub trait MySync: Sync {}
impl<T: Sync> MySync for T {}

#[async_trait]
pub trait Fetcher: MySend + MySync {
    async fn get(self: &Box<Self>, _url: &str) -> Vec<u8> {
        todo!()
    }
}

pub struct Runtime {
    pub fetcher: Box<dyn Fetcher>,
}

impl Default for Runtime {
    fn default() -> Self {
        todo!()
    }
}

pub fn foo() {
    let runtime: Runtime = Default::default();
    let _ = runtime.fetcher.get("https://example.com");
}

Meta

rustc --version --verbose:

rustc 1.64.0 (a55dd71d5 2022-09-19)
binary: rustc
commit-hash: a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52
commit-date: 2022-09-19
host: x86_64-unknown-linux-gnu
release: 1.64.0
LLVM version: 14.0.6

Error output

error: internal compiler error: compiler/rustc_middle/src/ty/layout.rs:3465:18: receiver type has unsupported layout: TyAndLayout { ty: &std::boxed::Box<dyn Fetcher>, layout: Layout { size: Size(8 bytes), align: AbiAndPrefAlign { abi: Align(8 bytes), pref: Align(8 bytes) }, abi: Scalar(Initialized { value: Pointer, valid_range: 1..=18446744073709551615 }), fields: Primitive, largest_niche: Some(Niche { offset: Size(0 bytes), value: Pointer, valid_range: 1..=18446744073709551615 }), variants: Single { index: 0 } } }

Backtrace

thread 'rustc' panicked at 'Box<dyn Any>', /rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/compiler/rustc_errors/src/lib.rs:1392:9
stack backtrace:
   0: std::panicking::begin_panic::<rustc_errors::ExplicitBug>
   1: std::panic::panic_any::<rustc_errors::ExplicitBug>
   2: <rustc_errors::HandlerInner>::bug::<&alloc::string::String>
   3: <rustc_errors::Handler>::bug::<&alloc::string::String>
   4: rustc_middle::ty::context::tls::with_opt::<rustc_middle::util::bug::opt_span_bug_fmt<rustc_span::span_encoding::Span>::{closure#0}, ()>
   5: rustc_middle::util::bug::opt_span_bug_fmt::<rustc_span::span_encoding::Span>
   6: rustc_middle::util::bug::bug_fmt
   7: rustc_middle::ty::layout::make_thin_self_ptr::<rustc_middle::ty::layout::LayoutCx<rustc_middle::ty::context::TyCtxt>>
   8: <&mut &mut <core::iter::adapters::enumerate::Enumerate<_> as core::iter::traits::iterator::Iterator>::try_fold::enumerate<rustc_middle::ty::Ty, (), core::ops::control_flow::ControlFlow<core::ops::control_flow::ControlFlow<rustc_target::abi::call::ArgAbi<rustc_middle::ty::Ty>>>, core::iter::adapters::map::map_try_fold<(usize, rustc_middle::ty::Ty), core::result::Result<rustc_target::abi::call::ArgAbi<rustc_middle::ty::Ty>, rustc_middle::ty::layout::FnAbiError>, (), core::ops::control_flow::ControlFlow<core::ops::control_flow::ControlFlow<rustc_target::abi::call::ArgAbi<rustc_middle::ty::Ty>>>, <rustc_middle::ty::layout::LayoutCx<rustc_middle::ty::context::TyCtxt>>::fn_abi_new_uncached::{closure#2}, <core::iter::adapters::GenericShunt<core::iter::adapters::map::Map<core::iter::adapters::enumerate::Enumerate<core::iter::adapters::chain::Chain<core::iter::adapters::chain::Chain<core::iter::adapters::copied::Copied<core::slice::iter::Iter<rustc_middle::ty::Ty>>, core::iter::adapters::copied::Copied<core::slice::iter::Iter<rustc_middle::ty::Ty>>>, core::option::IntoIter<rustc_middle::ty::Ty>>>, <rustc_middle::ty::layout::LayoutCx<rustc_middle::ty::context::TyCtxt>>::fn_abi_new_uncached::{closure#2}>, core::result::Result<core::convert::Infallible, rustc_middle::ty::layout::FnAbiError>> as core::iter::traits::iterator::Iterator>::try_fold<(), core::iter::traits::iterator::Iterator::try_for_each::call<rustc_target::abi::call::ArgAbi<rustc_middle::ty::Ty>, core::ops::control_flow::ControlFlow<rustc_target::abi::call::ArgAbi<rustc_middle::ty::Ty>>, core::ops::control_flow::ControlFlow<rustc_target::abi::call::ArgAbi<rustc_middle::ty::Ty>>::Break>::{closure#0}, core::ops::control_flow::ControlFlow<rustc_target::abi::call::ArgAbi<rustc_middle::ty::Ty>>>::{closure#0}>::{closure#0}>::{closure#0} as core::ops::function::FnMut<((), rustc_middle::ty::Ty)>>::call_mut
   9: <alloc::vec::Vec<rustc_target::abi::call::ArgAbi<rustc_middle::ty::Ty>> as alloc::vec::spec_from_iter::SpecFromIter<rustc_target::abi::call::ArgAbi<rustc_middle::ty::Ty>, core::iter::adapters::GenericShunt<core::iter::adapters::map::Map<core::iter::adapters::enumerate::Enumerate<core::iter::adapters::chain::Chain<core::iter::adapters::chain::Chain<core::iter::adapters::copied::Copied<core::slice::iter::Iter<rustc_middle::ty::Ty>>, core::iter::adapters::copied::Copied<core::slice::iter::Iter<rustc_middle::ty::Ty>>>, core::option::IntoIter<rustc_middle::ty::Ty>>>, <rustc_middle::ty::layout::LayoutCx<rustc_middle::ty::context::TyCtxt>>::fn_abi_new_uncached::{closure#2}>, core::result::Result<core::convert::Infallible, rustc_middle::ty::layout::FnAbiError>>>>::from_iter
  10: <rustc_middle::ty::layout::LayoutCx<rustc_middle::ty::context::TyCtxt>>::fn_abi_new_uncached
  11: rustc_middle::ty::layout::fn_abi_of_instance
  12: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle::ty::context::TyCtxt, rustc_middle::ty::ParamEnvAnd<(rustc_middle::ty::instance::Instance, &rustc_middle::ty::list::List<rustc_middle::ty::Ty>)>, core::result::Result<&rustc_target::abi::call::FnAbi<rustc_middle::ty::Ty>, rustc_middle::ty::layout::FnAbiError>>
  13: rustc_query_system::query::plumbing::get_query::<rustc_query_impl::queries::fn_abi_of_instance, rustc_query_impl::plumbing::QueryCtxt>
  14: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::fn_abi_of_instance
  15: rustc_codegen_ssa::mir::codegen_mir::<rustc_codegen_llvm::builder::Builder>
  16: rustc_codegen_llvm::base::compile_codegen_unit::module_codegen
  17: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle::ty::context::TyCtxt, rustc_span::symbol::Symbol, rustc_codegen_ssa::ModuleCodegen<rustc_codegen_llvm::ModuleLlvm>>
  18: rustc_codegen_llvm::base::compile_codegen_unit
  19: <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_ssa::traits::backend::CodegenBackend>::codegen_crate
  20: <rustc_session::session::Session>::time::<alloc::boxed::Box<dyn core::any::Any>, rustc_interface::passes::start_codegen::{closure#0}>
  21: <rustc_interface::passes::QueryContext>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_errors::ErrorGuaranteed>>
  22: <rustc_interface::queries::Queries>::ongoing_codegen
  23: <rustc_interface::interface::Compiler>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_errors::ErrorGuaranteed>>
  24: rustc_span::with_source_map::<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_interface::interface::create_compiler_and_run<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_driver::run_compiler::{closure#1}>::{closure#1}>
  25: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_driver::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>

[compiler-errors]

Minimized:

use std::future::Future;
use std::pin::Pin;

pub trait Fetcher: Send + Sync {
    fn get<'a>(self: &'a Box<Self>) -> Pin<Box<dyn Future<Output = Vec<u8>> + 'a>>
    where
        Self: Sync,
    {
        todo!()
    }
}

fn fetcher() -> Box<dyn Fetcher> {
    todo!()
}

pub fn foo() {
    let fetcher = fetcher();
    let _ = fetcher.get();
}