the compiler unexpectedly panicked

[SKumarMetro]

   Compiling jsonrpsee-types v0.9.0
error: internal compiler error: no errors encountered even though `delay_span_bug` issued

error: internal compiler error: broken MIR in DefId(0:345 ~ tower[a767]::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[a767]::balance::p2c::service::{impl#1}::new), UserSubsts { substs: [^0, ^1], user_self_ty: Some(UserSelfTy { impl_def_id: DefId(0:229 ~ tower[a767]::balance::p2c::service::{impl#1}), self_ty: balance::p2c::service::Balance<^2, ^3> }) }) }, span: /Users/suresh/.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[a767]::balance::p2c::service::{impl#1}::new) UserSubsts { substs: [_, _], user_self_ty: Some(UserSelfTy { impl_def_id: DefId(0:229 ~ tower[a767]::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
stack backtrace:
   0:        0x10503d562 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h7c606ed39af3c977
   1:        0x105094cda - core::fmt::write::hd050c91eba8ab2b4
   2:        0x10502f5dc - std::io::Write::write_fmt::h3f5cc8884c999cca
   3:        0x10504044b - std::panicking::default_hook::{{closure}}::h2107e030d5e79fab
   4:        0x105040157 - std::panicking::default_hook::h455d96c131ddf744
   5:        0x112e129ea - rustc_driver[82b50a4d5b7f2fa0]::DEFAULT_HOOK::{closure#0}::{closure#0}
   6:        0x105040b7e - std::panicking::rust_panic_with_hook::haf931a0c2a6e5b0c
   7:        0x117813757 - std[7415c8c995e59273]::panicking::begin_panic::<rustc_errors[5795b0248035ffe8]::ExplicitBug>::{closure#0}
   8:        0x117812f09 - std[7415c8c995e59273]::sys_common::backtrace::__rust_end_short_backtrace::<std[7415c8c995e59273]::panicking::begin_panic<rustc_errors[5795b0248035ffe8]::ExplicitBug>::{closure#0}, !>
   9:        0x117b78c69 - std[7415c8c995e59273]::panicking::begin_panic::<rustc_errors[5795b0248035ffe8]::ExplicitBug>
  10:        0x117808289 - std[7415c8c995e59273]::panic::panic_any::<rustc_errors[5795b0248035ffe8]::ExplicitBug>
  11:        0x11780cd47 - <rustc_errors[5795b0248035ffe8]::HandlerInner as core[e75ec226292a4799]::ops::drop::Drop>::drop
  12:        0x112e41f0a - core[e75ec226292a4799]::ptr::drop_in_place::<rustc_session[737c48d2e88decc6]::parse::ParseSess>
  13:        0x112e4897b - <alloc[d9e3a1f03acd69e7]::rc::Rc<rustc_session[737c48d2e88decc6]::session::Session> as core[e75ec226292a4799]::ops::drop::Drop>::drop
  14:        0x112e2e9f2 - core[e75ec226292a4799]::ptr::drop_in_place::<rustc_interface[7232c8082d234140]::interface::Compiler>
  15:        0x112e18cdf - rustc_interface[7232c8082d234140]::interface::create_compiler_and_run::<core[e75ec226292a4799]::result::Result<(), rustc_errors[5795b0248035ffe8]::ErrorGuaranteed>, rustc_driver[82b50a4d5b7f2fa0]::run_compiler::{closure#1}>
  16:        0x112e8c535 - <scoped_tls[c3943e6b81e4160f]::ScopedKey<rustc_span[ae2349af12ca5e5a]::SessionGlobals>>::set::<rustc_interface[7232c8082d234140]::interface::run_compiler<core[e75ec226292a4799]::result::Result<(), rustc_errors[5795b0248035ffe8]::ErrorGuaranteed>, rustc_driver[82b50a4d5b7f2fa0]::run_compiler::{closure#1}>::{closure#0}, core[e75ec226292a4799]::result::Result<(), rustc_errors[5795b0248035ffe8]::ErrorGuaranteed>>
  17:        0x112e4f93a - std[7415c8c995e59273]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[7232c8082d234140]::util::run_in_thread_pool_with_globals<rustc_interface[7232c8082d234140]::interface::run_compiler<core[e75ec226292a4799]::result::Result<(), rustc_errors[5795b0248035ffe8]::ErrorGuaranteed>, rustc_driver[82b50a4d5b7f2fa0]::run_compiler::{closure#1}>::{closure#0}, core[e75ec226292a4799]::result::Result<(), rustc_errors[5795b0248035ffe8]::ErrorGuaranteed>>::{closure#0}, core[e75ec226292a4799]::result::Result<(), rustc_errors[5795b0248035ffe8]::ErrorGuaranteed>>
  18:        0x112e53068 - <<std[7415c8c995e59273]::thread::Builder>::spawn_unchecked_<rustc_interface[7232c8082d234140]::util::run_in_thread_pool_with_globals<rustc_interface[7232c8082d234140]::interface::run_compiler<core[e75ec226292a4799]::result::Result<(), rustc_errors[5795b0248035ffe8]::ErrorGuaranteed>, rustc_driver[82b50a4d5b7f2fa0]::run_compiler::{closure#1}>::{closure#0}, core[e75ec226292a4799]::result::Result<(), rustc_errors[5795b0248035ffe8]::ErrorGuaranteed>>::{closure#0}, core[e75ec226292a4799]::result::Result<(), rustc_errors[5795b0248035ffe8]::ErrorGuaranteed>>::{closure#1} as core[e75ec226292a4799]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  19:        0x105049ae7 - std::sys::unix::thread::Thread::new::thread_start::he90b8cf058ff781c
  20:     0x7ff81d0b14e1 - __pthread_start

note: the compiler unexpectedly panicked. this is a bug.

[SKumarMetro]

export RUSTFLAGS="-Zprofile -Ccodegen-units=1 -Copt-level=0 -Clink-dead-code -Coverflow-checks=off"

These are the flags used, when I remove -Zprofile then don't see the compier panic.

[TaKO8Ki]

Could you please share the code to reproduce this ICE?

[matthiaskrgr]

Duplicate of #101844 , should be fixed with todays nightly