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ICE: rustdoc: unexpected const parent in type_of() / Const::from_anon_const: couldn't lit_to_const TypeError #102467

Closed matthiaskrgr closed 1 year ago

matthiaskrgr commented 2 years ago

Code

./src/test/ui/associated-consts/issue-102335-const.rs

#![feature(associated_const_equality)]

trait T {
    type A: S<C<X = 0i32> = 34>;
    //~^ ERROR associated type bindings are not allowed here
}

trait S {
    const C: i32;
}

fn main() {}

Meta

rustc --version --verbose:

rustdoc 1.66.0-nightly (ce7f0f1aa 2022-09-28)
binary: rustdoc
commit-hash: ce7f0f1aa0f02c45cad0749e63f3086234b1f422
commit-date: 2022-09-28
host: x86_64-unknown-linux-gnu
release: 1.66.0-nightly
LLVM version: 15.0.0

Error output

rustdoc ./src/test/ui/associated-consts/issue-102335-const.rs

<output>
Backtrace

``` thread 'rustc' panicked at 'Error', src/librustdoc/clean/mod.rs:1737:25 stack backtrace: 0: 0x7fe774570170 - std::backtrace_rs::backtrace::libunwind::trace::hac9b0f7f9661e748 at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5 1: 0x7fe774570170 - std::backtrace_rs::backtrace::trace_unsynchronized::hc44795987fc42d34 at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5 2: 0x7fe774570170 - std::sys_common::backtrace::_print_fmt::h11541e17c3fc86a7 at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/sys_common/backtrace.rs:66:5 3: 0x7fe774570170 - ::fmt::hc17ff1666cc882db at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/sys_common/backtrace.rs:45:22 4: 0x7fe7745cae2e - core::fmt::write::h55fcab10ae826150 at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/core/src/fmt/mod.rs:1209:17 5: 0x7fe774560db5 - std::io::Write::write_fmt::hf963d6d18d14f181 at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/io/mod.rs:1679:15 6: 0x7fe774572ef3 - std::sys_common::backtrace::_print::h994ce2c0e5b405c8 at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/sys_common/backtrace.rs:48:5 7: 0x7fe774572ef3 - std::sys_common::backtrace::print::hcc56026dcd969e04 at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/sys_common/backtrace.rs:35:9 8: 0x7fe774572ef3 - std::panicking::default_hook::{{closure}}::h88f2c5d855241086 at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/panicking.rs:267:22 9: 0x7fe774572bdf - std::panicking::default_hook::h8c95d81babfc3452 at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/panicking.rs:286:9 10: 0x7fe776da8801 - rustc_driver[b4131074c7377c18]::DEFAULT_HOOK::{closure#0}::{closure#0} 11: 0x7fe77457372b - as core::ops::function::Fn>::call::h67c5cbe4132c274b at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/alloc/src/boxed.rs:1952:9 12: 0x7fe77457372b - std::panicking::rust_panic_with_hook::h60207dae86acc93c at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/panicking.rs:673:13 13: 0x7fe774573541 - std::panicking::begin_panic_handler::{{closure}}::h417b25e282e7bdd0 at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/panicking.rs:558:13 14: 0x7fe77457061c - std::sys_common::backtrace::__rust_end_short_backtrace::hed3dc7a8acb54b37 at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/sys_common/backtrace.rs:138:18 15: 0x7fe7745732a2 - rust_begin_unwind at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/panicking.rs:556:5 16: 0x7fe7745c7a03 - core::panicking::panic_fmt::h33353e845faa36b7 at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/core/src/panicking.rs:142:14 17: 0x564a50dd4edc - rustdoc[fd64ae257ec160cb]::clean::clean_middle_ty 18: 0x564a50dcb112 - rustdoc[fd64ae257ec160cb]::clean::clean_middle_const 19: 0x564a50dd5ac8 - rustdoc[fd64ae257ec160cb]::clean::clean_generic_args 20: 0x564a50dd59a8 - rustdoc[fd64ae257ec160cb]::clean::clean_generic_args 21: 0x564a50be9b8d - as alloc[c8bb264001a6b8ff]::vec::spec_from_iter::SpecFromIter, rustdoc[fd64ae257ec160cb]::clean::clean_path::{closure#0}>>>::from_iter 22: 0x564a50dcf39e - rustdoc[fd64ae257ec160cb]::clean::clean_poly_trait_ref 23: 0x564a50dca56b - rustdoc[fd64ae257ec160cb]::clean::clean_generic_bound 24: 0x564a50bea67e - as alloc[c8bb264001a6b8ff]::vec::spec_from_iter::SpecFromIter, rustdoc[fd64ae257ec160cb]::clean::clean_trait_item::{closure#0}::{closure#2}>>>::from_iter 25: 0x564a50cd1104 - ::with_param_env:: 26: 0x564a50bef421 - as alloc[c8bb264001a6b8ff]::vec::spec_from_iter::SpecFromIter, rustdoc[fd64ae257ec160cb]::clean::clean_maybe_renamed_item::{closure#1}::{closure#5}>>>::from_iter 27: 0x564a50ccef37 - ::with_param_env::, rustdoc[fd64ae257ec160cb]::clean::clean_maybe_renamed_item::{closure#1}> 28: 0x564a50dc8b5b - <&mut rustdoc[fd64ae257ec160cb]::clean::clean_doc_module::{closure#2} as core[de81bf0691074480]::ops::function::FnOnce<(&(&rustc_hir[d07a7723d7da46ee]::hir::Item, core[de81bf0691074480]::option::Option),)>>::call_once 29: 0x564a50be04aa - as alloc[c8bb264001a6b8ff]::vec::spec_extend::SpecExtend)>, alloc[c8bb264001a6b8ff]::vec::Vec, rustdoc[fd64ae257ec160cb]::clean::clean_doc_module::{closure#2}>>>::spec_extend 30: 0x564a50dca1a0 - rustdoc[fd64ae257ec160cb]::clean::clean_doc_module 31: 0x564a50b9cdf4 - rustdoc[fd64ae257ec160cb]::clean::utils::krate 32: 0x564a50dec964 - ::time:: 33: 0x564a50cd6761 - rustdoc[fd64ae257ec160cb]::core::run_global_ctxt 34: 0x564a50decd8f - ::time::<(rustdoc[fd64ae257ec160cb]::clean::types::Crate, rustdoc[fd64ae257ec160cb]::config::RenderOptions, rustdoc[fd64ae257ec160cb]::formats::cache::Cache), rustdoc[fd64ae257ec160cb]::main_options::{closure#0}::{closure#0}::{closure#1}::{closure#0}> 35: 0x564a50d3f381 - ::enter::> 36: 0x564a50c8f12b - ::enter::> 37: 0x564a50e63a80 - rustc_span[a9093c78adc8a30e]::with_source_map::, rustc_interface[f0f2c906f605917e]::interface::create_compiler_and_run, rustdoc[fd64ae257ec160cb]::main_options::{closure#0}>::{closure#1}> 38: 0x564a50cbe51e - rustc_interface[f0f2c906f605917e]::interface::create_compiler_and_run::, rustdoc[fd64ae257ec160cb]::main_options::{closure#0}> 39: 0x564a50b4bea0 - rustdoc[fd64ae257ec160cb]::main_options 40: 0x564a50c9088b - >::set::> 41: 0x564a50e028b0 - std[1bac5bf8d99344e6]::sys_common::backtrace::__rust_begin_short_backtrace::>::{closure#0}, core[de81bf0691074480]::result::Result<(), rustc_errors[6dd3b64aee5d90d7]::ErrorGuaranteed>> 42: 0x564a50cc2dec - <::spawn_unchecked_>::{closure#0}, core[de81bf0691074480]::result::Result<(), rustc_errors[6dd3b64aee5d90d7]::ErrorGuaranteed>>::{closure#1} as core[de81bf0691074480]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0} 43: 0x7fe77457d393 - as core::ops::function::FnOnce>::call_once::hd5e3cab38cec9739 at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/alloc/src/boxed.rs:1938:9 44: 0x7fe77457d393 - as core::ops::function::FnOnce>::call_once::h970a034a5216df96 at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/alloc/src/boxed.rs:1938:9 45: 0x7fe77457d393 - std::sys::unix::thread::Thread::new::thread_start::h19f111f22a37ea01 at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/sys/unix/thread.rs:108:17 46: 0x7fe7742b578d - 47: 0x7fe7743368e4 - clone 48: 0x0 - 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 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: unexpected const parent in type_of(): TypeBinding(TypeBinding { hir_id: HirId { owner: OwnerId { def_id: DefId(0:4 ~ issue_102335_const[6795]::T::A) }, local_id: 3 }, ident: X#0, gen_args: GenericArgs { args: [], bindings: [], parenthesized: false, span_ext: no-location (#0) }, kind: Equality { term: Const(AnonConst { hir_id: HirId { owner: OwnerId { def_id: DefId(0:4 ~ issue_102335_const[6795]::T::A) }, local_id: 1 }, body: BodyId { hir_id: HirId { owner: OwnerId { def_id: DefId(0:4 ~ issue_102335_const[6795]::T::A) }, local_id: 2 } } }) }, span: ./src/test/ui/associated-consts/issue-102335-const.rs:4:17: 4:25 (#0) }) | = note: delayed at compiler/rustc_hir_analysis/src/collect/type_of.rs:456:23 error: internal compiler error: Const::from_anon_const: couldn't lit_to_const TypeError --> ./src/test/ui/associated-consts/issue-102335-const.rs:4:21 | 4 | type A: S = 34>; | ^^^^ | = note: delayed at compiler/rustc_middle/src/ty/consts.rs:122:30 thread 'rustc' panicked at 'Box', compiler/rustc_errors/src/lib.rs:1530:13 stack backtrace: 0: 0x7fe774570170 - std::backtrace_rs::backtrace::libunwind::trace::hac9b0f7f9661e748 at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5 1: 0x7fe774570170 - std::backtrace_rs::backtrace::trace_unsynchronized::hc44795987fc42d34 at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5 2: 0x7fe774570170 - std::sys_common::backtrace::_print_fmt::h11541e17c3fc86a7 at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/sys_common/backtrace.rs:66:5 3: 0x7fe774570170 - ::fmt::hc17ff1666cc882db at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/sys_common/backtrace.rs:45:22 4: 0x7fe7745cae2e - core::fmt::write::h55fcab10ae826150 at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/core/src/fmt/mod.rs:1209:17 5: 0x7fe774560db5 - std::io::Write::write_fmt::hf963d6d18d14f181 at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/io/mod.rs:1679:15 6: 0x7fe774572ef3 - std::sys_common::backtrace::_print::h994ce2c0e5b405c8 at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/sys_common/backtrace.rs:48:5 7: 0x7fe774572ef3 - std::sys_common::backtrace::print::hcc56026dcd969e04 at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/sys_common/backtrace.rs:35:9 8: 0x7fe774572ef3 - std::panicking::default_hook::{{closure}}::h88f2c5d855241086 at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/panicking.rs:267:22 9: 0x7fe774572bdf - std::panicking::default_hook::h8c95d81babfc3452 at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/panicking.rs:286:9 10: 0x7fe776da8801 - rustc_driver[b4131074c7377c18]::DEFAULT_HOOK::{closure#0}::{closure#0} 11: 0x7fe77457372b - as core::ops::function::Fn>::call::h67c5cbe4132c274b at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/alloc/src/boxed.rs:1952:9 12: 0x7fe77457372b - std::panicking::rust_panic_with_hook::h60207dae86acc93c at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/panicking.rs:673:13 13: 0x7fe777ec1701 - std[1bac5bf8d99344e6]::panicking::begin_panic::::{closure#0} 14: 0x7fe777ec0026 - std[1bac5bf8d99344e6]::sys_common::backtrace::__rust_end_short_backtrace::::{closure#0}, !> 15: 0x7fe777eb9fb6 - std[1bac5bf8d99344e6]::panicking::begin_panic:: 16: 0x7fe777ebc7d6 - std[1bac5bf8d99344e6]::panic::panic_any:: 17: 0x7fe7769151c8 - ::drop 18: 0x564a50e54c78 - core[de81bf0691074480]::ptr::drop_in_place:: 19: 0x564a50e5e698 - as core[de81bf0691074480]::ops::drop::Drop>::drop 20: 0x564a50e79b2d - core[de81bf0691074480]::ptr::drop_in_place:: 21: 0x564a50e63c40 - rustc_span[a9093c78adc8a30e]::with_source_map::, rustc_interface[f0f2c906f605917e]::interface::create_compiler_and_run, rustdoc[fd64ae257ec160cb]::main_options::{closure#0}>::{closure#1}> 22: 0x564a50cbe51e - rustc_interface[f0f2c906f605917e]::interface::create_compiler_and_run::, rustdoc[fd64ae257ec160cb]::main_options::{closure#0}> 23: 0x564a50b4bea0 - rustdoc[fd64ae257ec160cb]::main_options 24: 0x564a50c9088b - >::set::> 25: 0x564a50e028b0 - std[1bac5bf8d99344e6]::sys_common::backtrace::__rust_begin_short_backtrace::>::{closure#0}, core[de81bf0691074480]::result::Result<(), rustc_errors[6dd3b64aee5d90d7]::ErrorGuaranteed>> 26: 0x564a50cc2dec - <::spawn_unchecked_>::{closure#0}, core[de81bf0691074480]::result::Result<(), rustc_errors[6dd3b64aee5d90d7]::ErrorGuaranteed>>::{closure#1} as core[de81bf0691074480]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0} 27: 0x7fe77457d393 - as core::ops::function::FnOnce>::call_once::hd5e3cab38cec9739 at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/alloc/src/boxed.rs:1938:9 28: 0x7fe77457d393 - as core::ops::function::FnOnce>::call_once::h970a034a5216df96 at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/alloc/src/boxed.rs:1938:9 29: 0x7fe77457d393 - std::sys::unix::thread::Thread::new::thread_start::h19f111f22a37ea01 at /rustc/ce7f0f1aa0f02c45cad0749e63f3086234b1f422/library/std/src/sys/unix/thread.rs:108:17 30: 0x7fe7742b578d - 31: 0x7fe7743368e4 - clone 32: 0x0 - 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 query stack during panic: end of query stack thread panicked while panicking. aborting. [1] 203826 IOT instruction (core dumped) rustdoc ./src/test/ui/associated-consts/issue-102335-const.rs ```

GuillaumeGomez commented 2 years ago

For an unknown reason, it doesn't fail before we're way into the clean part of rustdoc when calling from_anon_const.

GuillaumeGomez commented 2 years ago

I tried this:

```patch diff --git a/compiler/rustc_errors/src/lib.rs b/compiler/rustc_errors/src/lib.rs index 4d262ae0f5e..684c657620a 100644 --- a/compiler/rustc_errors/src/lib.rs +++ b/compiler/rustc_errors/src/lib.rs @@ -1011,6 +1011,16 @@ pub fn abort_if_errors(&self) { self.inner.borrow_mut().abort_if_errors() } + pub fn abort_if_errors_or_delayed_span_bugs(&self) { + self.abort_if_errors(); + let mut inner = self.inner.borrow(); + if inner.has_delayed_span_bugs() { + let bugs = inner.delayed_span_bugs.clone(); + inner.flush_delayed(bugs, "no errors encountered even though `delay_span_bug` issued"); + FatalError.raise(); + } + } + /// `true` if we haven't taught a diagnostic with this code already. /// The caller must then teach the user about such a diagnostic. /// @@ -1414,7 +1424,10 @@ fn has_errors_or_lint_errors(&self) -> bool { self.has_errors() || self.lint_err_count > 0 } fn has_errors_or_delayed_span_bugs(&self) -> bool { - self.has_errors() || !self.delayed_span_bugs.is_empty() + self.has_errors() || !self.has_delayed_span_bugs() + } + fn has_delayed_span_bugs(&self) -> bool { + !self.delayed_span_bugs.is_empty() } fn has_any_message(&self) -> bool { self.err_count() > 0 || self.lint_err_count > 0 || self.warn_count > 0 diff --git a/compiler/rustc_session/src/session.rs b/compiler/rustc_session/src/session.rs index 0142e981766..0e4afbcf191 100644 --- a/compiler/rustc_session/src/session.rs +++ b/compiler/rustc_session/src/session.rs @@ -555,6 +555,9 @@ pub fn has_errors_or_delayed_span_bugs(&self) -> bool { pub fn abort_if_errors(&self) { self.diagnostic().abort_if_errors(); } + pub fn abort_if_errors_or_delayed_span_bugs(&self) { + self.diagnostic().abort_if_errors_or_delayed_span_bugs(); + } pub fn compile_status(&self) -> Result<(), ErrorGuaranteed> { if let Some(reported) = self.diagnostic().has_errors_or_lint_errors() { let _ = self.diagnostic().emit_stashed_diagnostics(); diff --git a/library/stdarch b/library/stdarch --- a/library/stdarch +++ b/library/stdarch @@ -1 +1 @@ -Subproject commit 699c093a42283c07e9763b4c19439a900ae2d321 +Subproject commit 699c093a42283c07e9763b4c19439a900ae2d321-dirty diff --git a/src/librustdoc/clean/mod.rs b/src/librustdoc/clean/mod.rs index 704292c1048..a75b0c592d3 100644 --- a/src/librustdoc/clean/mod.rs +++ b/src/librustdoc/clean/mod.rs @@ -381,7 +381,9 @@ fn clean_hir_term<'tcx>(term: &hir::Term<'tcx>, cx: &mut DocContext<'tcx>) -> Te hir::Term::Ty(ty) => Term::Type(clean_ty(ty, cx)), hir::Term::Const(c) => { let def_id = cx.tcx.hir().local_def_id(c.hir_id); - Term::Constant(clean_middle_const(ty::Const::from_anon_const(cx.tcx, def_id), cx)) + let ty = ty::Const::from_anon_const(cx.tcx, def_id); + cx.tcx.sess.abort_if_errors_or_delayed_span_bugs(); + Term::Constant(clean_middle_const(ty, cx)) } } } ```

But unfortunately the result still looks bad:

error: internal compiler error: no errors encountered even though `delay_span_bug` issued

error: internal compiler error: unexpected const parent in type_of(): TypeBinding(TypeBinding { hir_id: HirId { owner: OwnerId { def_id: DefId(0:2 ~ foo[dca6]::T::A) }, local_id: 3 }, ident: X#0, gen_args: GenericArgs { args: [], bindings: [], parenthesized: false, span_ext: no-location (#0) }, kind: Equality { term: Const(AnonConst { hir_id: HirId { owner: OwnerId { def_id: DefId(0:2 ~ foo[dca6]::T::A) }, local_id: 1 }, body: BodyId { hir_id: HirId { owner: OwnerId { def_id: DefId(0:2 ~ foo[dca6]::T::A) }, local_id: 2 } } }) }, span: foo.rs:8:17: 8:25 (#0) })
  |
  = note: delayed at compiler/rustc_hir_analysis/src/collect/type_of.rs:456:23

error: internal compiler error: Const::from_anon_const: couldn't lit_to_const TypeError
 --> foo.rs:8:21
  |
8 |     type A: S<C<X = 0i32> = 34>;
  |                     ^^^^
  |
  = note: delayed at compiler/rustc_middle/src/ty/consts.rs:122:30

thread 'rustc' panicked at 'Box<dyn Any>', compiler/rustc_errors/src/lib.rs:1542:13
stack backtrace:
   0:     0x7fdf469a2090 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h69c219382a706de4
   1:     0x7fdf46a0f84e - core::fmt::write::hfaba6c7f5d324983
   2:     0x7fdf469716d5 - std::io::Write::write_fmt::he0f5763098f70719
   3:     0x7fdf46984e04 - std::panicking::default_hook::{{closure}}::hadd9f7be4096b7a1
   4:     0x7fdf46984a58 - std::panicking::default_hook::h7c40de63bd1ac842
   5:     0x7fdf4710b826 - rustc_driver[bf5b15a4efa2da32]::DEFAULT_HOOK::{closure#0}::{closure#0}
   6:     0x7fdf469855bd - std::panicking::rust_panic_with_hook::hd33806f1a523247b
   7:     0x7fdf49a967a3 - std[77418543e64ae431]::panicking::begin_panic::<rustc_errors[e621a6510cc517c5]::ExplicitBug>::{closure#0}
   8:     0x7fdf49a95cd6 - std[77418543e64ae431]::sys_common::backtrace::__rust_end_short_backtrace::<std[77418543e64ae431]::panicking::begin_panic<rustc_errors[e621a6510cc517c5]::ExplicitBug>::{closure#0}, !>
   9:     0x7fdf470e5496 - std[77418543e64ae431]::panicking::begin_panic::<rustc_errors[e621a6510cc517c5]::ExplicitBug>
  10:     0x7fdf49a8b096 - std[77418543e64ae431]::panic::panic_any::<rustc_errors[e621a6510cc517c5]::ExplicitBug>
  11:     0x7fdf49a93579 - <rustc_errors[e621a6510cc517c5]::HandlerInner>::flush_delayed::<alloc[344271dbb998174e]::vec::Vec<rustc_errors[e621a6510cc517c5]::diagnostic::Diagnostic>, &str>
  12:     0x7fdf49a91b6a - <rustc_errors[e621a6510cc517c5]::Handler>::abort_if_errors_or_delayed_span_bugs
  13:     0x55bf9d4f5f5e - rustdoc[3755b0600f342e0c]::clean::clean_generic_args
  14:     0x55bf9d4f5e38 - rustdoc[3755b0600f342e0c]::clean::clean_generic_args
  15:     0x55bf9d5f381d - <alloc[344271dbb998174e]::vec::Vec<rustdoc[3755b0600f342e0c]::clean::types::PathSegment> as alloc[344271dbb998174e]::vec::spec_from_iter::SpecFromIter<rustdoc[3755b0600f342e0c]::clean::types::PathSegment, core[d55ced6309a25c5f]::iter::adapters::map::Map<core[d55ced6309a25c5f]::slice::iter::Iter<rustc_hir[854dfe8484ba389]::hir::PathSegment>, rustdoc[3755b0600f342e0c]::clean::clean_path::{closure#0}>>>::from_iter
  16:     0x55bf9d4ef83e - rustdoc[3755b0600f342e0c]::clean::clean_poly_trait_ref
  17:     0x55bf9d4eaa0b - rustdoc[3755b0600f342e0c]::clean::clean_generic_bound
  18:     0x55bf9d5f46ae - <alloc[344271dbb998174e]::vec::Vec<rustdoc[3755b0600f342e0c]::clean::types::GenericBound> as alloc[344271dbb998174e]::vec::spec_from_iter::SpecFromIter<rustdoc[3755b0600f342e0c]::clean::types::GenericBound, core[d55ced6309a25c5f]::iter::adapters::filter_map::FilterMap<core[d55ced6309a25c5f]::slice::iter::Iter<rustc_hir[854dfe8484ba389]::hir::GenericBound>, rustdoc[3755b0600f342e0c]::clean::clean_maybe_renamed_item::{closure#1}::{closure#0}>>>::from_iter
  19:     0x55bf9d3f6364 - <rustdoc[3755b0600f342e0c]::core::DocContext>::with_param_env::<rustdoc[3755b0600f342e0c]::clean::types::Item, rustdoc[3755b0600f342e0c]::clean::clean_trait_item::{closure#0}>
  20:     0x55bf9d5f9811 - <alloc[344271dbb998174e]::vec::Vec<rustdoc[3755b0600f342e0c]::clean::types::Item> as alloc[344271dbb998174e]::vec::spec_from_iter::SpecFromIter<rustdoc[3755b0600f342e0c]::clean::types::Item, core[d55ced6309a25c5f]::iter::adapters::map::Map<core[d55ced6309a25c5f]::slice::iter::Iter<rustc_hir[854dfe8484ba389]::hir::TraitItemRef>, rustdoc[3755b0600f342e0c]::clean::clean_maybe_renamed_item::{closure#1}::{closure#5}>>>::from_iter
  21:     0x55bf9d3f4197 - <rustdoc[3755b0600f342e0c]::core::DocContext>::with_param_env::<alloc[344271dbb998174e]::vec::Vec<rustdoc[3755b0600f342e0c]::clean::types::Item>, rustdoc[3755b0600f342e0c]::clean::clean_maybe_renamed_item::{closure#1}>
  22:     0x55bf9d4e8ffb - <&mut rustdoc[3755b0600f342e0c]::clean::clean_doc_module::{closure#2} as core[d55ced6309a25c5f]::ops::function::FnOnce<(&(&rustc_hir[854dfe8484ba389]::hir::Item, core[d55ced6309a25c5f]::option::Option<rustc_span[a05d955188b2abc7]::symbol::Symbol>),)>>::call_once
  23:     0x55bf9d5ea13a - <alloc[344271dbb998174e]::vec::Vec<rustdoc[3755b0600f342e0c]::clean::types::Item> as alloc[344271dbb998174e]::vec::spec_extend::SpecExtend<rustdoc[3755b0600f342e0c]::clean::types::Item, core[d55ced6309a25c5f]::iter::adapters::flatten::FlatMap<core[d55ced6309a25c5f]::slice::iter::Iter<(&rustc_hir[854dfe8484ba389]::hir::Item, core[d55ced6309a25c5f]::option::Option<rustc_span[a05d955188b2abc7]::symbol::Symbol>)>, alloc[344271dbb998174e]::vec::Vec<rustdoc[3755b0600f342e0c]::clean::types::Item>, rustdoc[3755b0600f342e0c]::clean::clean_doc_module::{closure#2}>>>::spec_extend
  24:     0x55bf9d4ea640 - rustdoc[3755b0600f342e0c]::clean::clean_doc_module
  25:     0x55bf9d679374 - rustdoc[3755b0600f342e0c]::clean::utils::krate
  26:     0x55bf9d50ce44 - <rustc_session[605dacab06639d89]::session::Session>::time::<rustdoc[3755b0600f342e0c]::clean::types::Crate, rustdoc[3755b0600f342e0c]::core::run_global_ctxt::{closure#4}>
  27:     0x55bf9d3fb9c1 - rustdoc[3755b0600f342e0c]::core::run_global_ctxt
  28:     0x55bf9d50d26f - <rustc_session[605dacab06639d89]::session::Session>::time::<(rustdoc[3755b0600f342e0c]::clean::types::Crate, rustdoc[3755b0600f342e0c]::config::RenderOptions, rustdoc[3755b0600f342e0c]::formats::cache::Cache), rustdoc[3755b0600f342e0c]::main_options::{closure#0}::{closure#0}::{closure#1}::{closure#0}>
  29:     0x55bf9d463261 - <rustc_interface[158590035fe8886d]::passes::QueryContext>::enter::<rustdoc[3755b0600f342e0c]::main_options::{closure#0}::{closure#0}::{closure#1}, core[d55ced6309a25c5f]::result::Result<(), rustc_errors[e621a6510cc517c5]::ErrorGuaranteed>>
  30:     0x55bf9d3b536b - <rustc_interface[158590035fe8886d]::interface::Compiler>::enter::<rustdoc[3755b0600f342e0c]::main_options::{closure#0}::{closure#0}, core[d55ced6309a25c5f]::result::Result<(), rustc_errors[e621a6510cc517c5]::ErrorGuaranteed>>
  31:     0x55bf9d5834b0 - rustc_span[a05d955188b2abc7]::with_source_map::<core[d55ced6309a25c5f]::result::Result<(), rustc_errors[e621a6510cc517c5]::ErrorGuaranteed>, rustc_interface[158590035fe8886d]::interface::create_compiler_and_run<core[d55ced6309a25c5f]::result::Result<(), rustc_errors[e621a6510cc517c5]::ErrorGuaranteed>, rustdoc[3755b0600f342e0c]::main_options::{closure#0}>::{closure#1}>
  32:     0x55bf9d3b949e - rustc_interface[158590035fe8886d]::interface::create_compiler_and_run::<core[d55ced6309a25c5f]::result::Result<(), rustc_errors[e621a6510cc517c5]::ErrorGuaranteed>, rustdoc[3755b0600f342e0c]::main_options::{closure#0}>
  33:     0x55bf9d3b36e0 - rustdoc[3755b0600f342e0c]::main_options
  34:     0x55bf9d3b693b - <scoped_tls[10d8a9c768e14d1c]::ScopedKey<rustc_span[a05d955188b2abc7]::SessionGlobals>>::set::<rustdoc[3755b0600f342e0c]::main_args::{closure#0}, core[d55ced6309a25c5f]::result::Result<(), rustc_errors[e621a6510cc517c5]::ErrorGuaranteed>>
  35:     0x55bf9d522de0 - std[77418543e64ae431]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[158590035fe8886d]::util::run_in_thread_pool_with_globals<rustdoc[3755b0600f342e0c]::main_args::{closure#0}, core[d55ced6309a25c5f]::result::Result<(), rustc_errors[e621a6510cc517c5]::ErrorGuaranteed>>::{closure#0}, core[d55ced6309a25c5f]::result::Result<(), rustc_errors[e621a6510cc517c5]::ErrorGuaranteed>>
  36:     0x55bf9d3e80ac - <<std[77418543e64ae431]::thread::Builder>::spawn_unchecked_<rustc_interface[158590035fe8886d]::util::run_in_thread_pool_with_globals<rustdoc[3755b0600f342e0c]::main_args::{closure#0}, core[d55ced6309a25c5f]::result::Result<(), rustc_errors[e621a6510cc517c5]::ErrorGuaranteed>>::{closure#0}, core[d55ced6309a25c5f]::result::Result<(), rustc_errors[e621a6510cc517c5]::ErrorGuaranteed>>::{closure#1} as core[d55ced6309a25c5f]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  37:     0x7fdf4695eaf3 - std::sys::unix::thread::Thread::new::thread_start::heafa918dcc1208d8
  38:     0x7fdf46624b43 - start_thread
                               at ./nptl/./nptl/pthread_create.c:442:8
  39:     0x7fdf466b6a00 - clone3
                               at ./misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:81
  40:                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-dev running on x86_64-unknown-linux-gnu

query stack during panic:
end of query stack
error: aborting due to 3 previous errors

Not sure what's going on and why this error appears this late.

matthiaskrgr commented 2 years ago

@GuillaumeGomez Hm, is it worth committing that? :slightly_smiling_face: In other examples like https://github.com/rust-lang/rust/issues/96287 we don't get any information at all on what the underlying error is and rustdoc just says thread 'rustc' panicked at 'Error', src/librustdoc/clean/mod.rs:1671:29

I know that there are perhaps 5-10 ices that all have this thread 'rustc' panicked at 'Error' message and its hard for me to tell if they all have the same cause or are actually due to different underlying issues. :/

GuillaumeGomez commented 2 years ago

I can provide a PR with this change if you want, but I'm not sure it's much of an improvement... Oh well. Pushing a PR and then you'll decide if you want it or not.

compiler-errors commented 1 year ago

This errors correctly on rustdoc now, needs test

GuillaumeGomez commented 1 year ago

I'll add it tomorrow then. Thanks for the heads up!