Broken MIR in DefId(0:345 ~ tower[bb9c]::balance::pool::{impl#3}::build)

[simonsan]

Meta

Stable works.

rustc --version --verbose:

rustc 1.65.0-nightly (750bd1a7f 2022-09-14)
binary: rustc
commit-hash: 750bd1a7ff3e010611b97ee75d30b7cbf5f3a03c
commit-date: 2022-09-14
host: x86_64-pc-windows-msvc
release: 1.65.0-nightly
LLVM version: 15.0.0

compiler flags:

--crate-type lib -C opt-level=3 -C embed-bitcode=no -C linker=rust-lld.exe

Error output

While building latest tokio-console v0.1.7:

   Compiling tower-http v0.3.4
error: internal compiler error: no errors encountered even though `delay_span_bug` issued

error: internal compiler error: broken MIR in DefId(0:345 ~ tower[bb9c]::balance::pool::{impl#3}::build) (CanonicalUserTypeAnnotation { user_ty: Canonical { max_universe: U0, variables: [CanonicalVarInfo { kind: Ty(General(U0)) }, CanonicalVarInfo { kind: Ty(General(U0)) }, CanonicalVarInfo { kind: Ty(General(U0)) }, CanonicalVarInfo { kind: Ty(General(U0)) }], value: TypeOf(DefId(0:232 ~ tower[bb9c]::balance::p2c::service::{impl#1}::new), UserSubsts { substs: [^0, ^1], user_self_ty: Some(UserSelfTy { impl_def_id: DefId(0:229 ~ tower[bb9c]::balance::p2c::service::{impl#1}), self_ty: balance::p2c::service::Balance<^2, ^3> }) }) }, span: C:\Users\dailyuse\.cargo\registry\src\github.com-1ecc6299db9ec823\tower-0.4.13\src\balance\pool\mod.rs:293:22: 293:34 (#0), inferred_ty: fn(std::pin::Pin<std::boxed::Box<balance::pool::PoolDiscoverer<MS, Target, Request>>>) -> balance::p2c::service::Balance<std::pin::Pin<std::boxed::Box<balance::pool::PoolDiscoverer<MS, Target, Request>>>, Request> {balance::p2c::service::Balance::<std::pin::Pin<std::boxed::Box<balance::pool::PoolDiscoverer<MS, Target, Request>>>, Request>::new} }): bad user type AscribeUserType(fn(std::pin::Pin<std::boxed::Box<balance::pool::PoolDiscoverer<MS, Target, Request>>>) -> balance::p2c::service::Balance<std::pin::Pin<std::boxed::Box<balance::pool::PoolDiscoverer<MS, Target, Request>>>, Request> {balance::p2c::service::Balance::<std::pin::Pin<std::boxed::Box<balance::pool::PoolDiscoverer<MS, Target, Request>>>, Request>::new}, DefId(0:232 ~ tower[bb9c]::balance::p2c::service::{impl#1}::new) UserSubsts { substs: [_, _], user_self_ty: Some(UserSelfTy { impl_def_id: DefId(0:229 ~ tower[bb9c]::balance::p2c::service::{impl#1}), self_ty: balance::p2c::service::Balance<_, _> }) }, type_of=fn(D) -> balance::p2c::service::Balance<D, Req> {balance::p2c::service::Balance::<D, Req>::new}): NoSolution
  |
  = note: delayed at compiler\rustc_borrowck\src\type_check\mod.rs:1087:25

thread 'rustc' panicked at 'Box<dyn Any>', compiler\rustc_errors\src\lib.rs:1492:13

Backtrace

   0:     0x7ffa55698fb2 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h62c8014c54436acb
   1:     0x7ffa556d425b - core::fmt::write::h44af67931433e644
   2:     0x7ffa5568b89a - <std::io::IoSlice as core::fmt::Debug>::fmt::hbdd8828ce8198188
   3:     0x7ffa5569c5b4 - std::panicking::default_hook::h165f7fa62393fd72
   4:     0x7ffa5569c1ea - std::panicking::default_hook::h165f7fa62393fd72
   5:     0x7ffa5ada379b - rustc_driver[135a73f48f5dfa02]::describe_lints
   6:     0x7ffa5569cfb2 - std::panicking::rust_panic_with_hook::hd10d69c628ae58b3
   7:     0x7ffa5d168763 - <rustc_errors[d68b46d92fd09d9b]::emitter::DisplaySuggestion as core[4f21d6070cbe0187]::fmt::Debug>::fmt
   8:     0x7ffa5d168229 - <rustc_errors[d68b46d92fd09d9b]::emitter::DisplaySuggestion as core[4f21d6070cbe0187]::fmt::Debug>::fmt
   9:     0x7ffa5d1681e9 - <rustc_errors[d68b46d92fd09d9b]::emitter::DisplaySuggestion as core[4f21d6070cbe0187]::fmt::Debug>::fmt
  10:     0x7ffa5d15cb59 - <rustc_feature[bef4a4b374d25508]::builtin_attrs::AttributeType as core[4f21d6070cbe0187]::fmt::Debug>::fmt
  11:     0x7ffa59589fd9 - <rustc_errors[d68b46d92fd09d9b]::HandlerInner as core[4f21d6070cbe0187]::ops::drop::Drop>::drop
  12:     0x7ffa586ca6b9 - rustc_driver[135a73f48f5dfa02]::main
  13:     0x7ffa586ccf31 - rustc_driver[135a73f48f5dfa02]::main
  14:     0x7ffa586de2ad - rustc_driver[135a73f48f5dfa02]::args::arg_expand_all
  15:     0x7ffa586dd78a - rustc_driver[135a73f48f5dfa02]::args::arg_expand_all
  16:     0x7ffa586c5eb0 - rustc_driver[135a73f48f5dfa02]::main
  17:     0x7ffa586de0e7 - rustc_driver[135a73f48f5dfa02]::args::arg_expand_all
  18:     0x7ffa586ce5f9 - rustc_driver[135a73f48f5dfa02]::main
  19:     0x7ffa586cea5d - rustc_driver[135a73f48f5dfa02]::main
  20:     0x7ffa556ad7cc - std::sys::windows::thread::Thread::new::h49097702d33d1e6a
  21:     0x7ffaf6407034 - BaseThreadInitThunk
  22:     0x7ffaf73026a1 - RtlUserThreadStart

[matthiaskrgr]

This has been fixed already #101844
should go away if you update your nightly

[simonsan]

@matthiaskrgr Ah thanks! :) Saw my nightly didn't (auto-)update due to missing miri in those.