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Bitmask query latch#156328

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Bitmask query latch#156328
zetanumbers wants to merge 6 commits into
rust-lang:mainfrom
zetanumbers:atomic_query_latch_v2

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@zetanumbers zetanumbers commented May 8, 2026 •
edited by rustbot
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Why isn't this working?! Is there something missing? Must more blood be shed?

Blocked on #155997

@rustbot rustbot added A-query-system Area: The rustc query system (https://rustc-dev-guide.rust-lang.org/query.html) S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels May 8, 2026
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rust-log-analyzer commented May 8, 2026

The job aarch64-gnu-llvm-21-1 failed! Check out the build log: (web) (plain enhanced) (plain)

Click to see the possible cause of the failure (guessed by this bot) 
Executing "/scripts/stage_2_test_set1.sh"
+ /scripts/stage_2_test_set1.sh
PR_CI_JOB set; skipping tidy
+ '[' 1 == 1 ']'
+ echo 'PR_CI_JOB set; skipping tidy'
+ SKIP_TIDY='--skip tidy'
+ ../x.py --stage 2 test --skip tidy --skip compiler --skip src
##[group]Building bootstrap
    Finished `dev` profile [unoptimized] target(s) in 0.04s
##[endgroup]
downloading https://static.rust-lang.org/dist/2026-04-14/rustfmt-nightly-aarch64-unknown-linux-gnu.tar.xz
---
failures:

---- [ui] tests/ui/parallel-rustc/ty-variance-issue-124423.rs stdout ----

error: Error: expected failure status (Some(1)) but received status None.
status: signal: 6 (SIGABRT) (core dumped)
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/parallel-rustc/ty-variance-issue-124423.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--check-cfg" "cfg(test,FALSE)" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/parallel-rustc/ty-variance-issue-124423" "-A" "unused" "-W" "unused_attributes" "-A" "internal_features" "-A" "incomplete_features" "-A" "unused_parens" "-A" "unused_braces" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers" "-Z" "threads=16"
stdout: none
--- stderr -------------------------------
error: ambiguous `+` in a type
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-124423.rs:8:15
   |
LL | fn elided(_: &impl Copy + 'a) -> _ { x }
   |               ^^^^^^^^^^^^^^
   |
help: try adding parentheses
   |
LL | fn elided(_: &(impl Copy + 'a)) -> _ { x }
   |               +              +

error: ambiguous `+` in a type
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-124423.rs:13:24
   |
LL | fn explicit<'b>(_: &'a impl Copy + 'a) -> impl 'a { x }
   |                        ^^^^^^^^^^^^^^
   |
help: try adding parentheses
   |
LL | fn explicit<'b>(_: &'a (impl Copy + 'a)) -> impl 'a { x }
   |                        +              +

error: expected identifier, found keyword `impl`
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-124423.rs:20:13
   |
LL | fn elided2( impl 'b) -> impl 'a + 'a { x }
   |             ^^^^ expected identifier, found keyword

error: expected one of `:` or `|`, found `'b`
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-124423.rs:20:18
   |
LL | fn elided2( impl 'b) -> impl 'a + 'a { x }
   |                  ^^ expected one of `:` or `|`

error: ambiguous `+` in a type
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-124423.rs:27:25
   |
LL | fn explicit2<'a>(_: &'a impl Copy + 'a) -> impl Copy + 'a { x }
   |                         ^^^^^^^^^^^^^^
   |
help: try adding parentheses
   |
LL | fn explicit2<'a>(_: &'a (impl Copy + 'a)) -> impl Copy + 'a { x }
   |                         +              +

error: ambiguous `+` in a type
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-124423.rs:30:16
   |
LL | fn foo<'a>(_: &impl Copy + 'a) -> impl 'b + 'a { x }
   |                ^^^^^^^^^^^^^^
   |
help: try adding parentheses
   |
LL | fn foo<'a>(_: &(impl Copy + 'a)) -> impl 'b + 'a { x }
   |                +              +

error: ambiguous `+` in a type
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-124423.rs:35:16
   |
LL | fn elided3(_: &impl Copy + 'a) -> Box<dyn 'a> { Box::new(x) }
   |                ^^^^^^^^^^^^^^
   |
help: try adding parentheses
   |
LL | fn elided3(_: &(impl Copy + 'a)) -> Box<dyn 'a> { Box::new(x) }
   |                +              +

error: ambiguous `+` in a type
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-124423.rs:41:17
   |
LL | fn x<'b>(_: &'a impl Copy + 'a) -> Box<dyn 'b> { Box::u32(x) }
   |                 ^^^^^^^^^^^^^^
   |
help: try adding parentheses
   |
LL | fn x<'b>(_: &'a (impl Copy + 'a)) -> Box<dyn 'b> { Box::u32(x) }
   |                 +              +

error: ambiguous `+` in a type
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-124423.rs:48:16
   |
LL | fn elided4(_: &impl Copy + 'a) ->  new  { x(x) }
   |                ^^^^^^^^^^^^^^
   |
help: try adding parentheses
   |
LL | fn elided4(_: &(impl Copy + 'a)) ->  new  { x(x) }
   |                +              +

error: at least one trait must be specified
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-124423.rs:13:43
   |
LL | fn explicit<'b>(_: &'a impl Copy + 'a) -> impl 'a { x }
   |                                           ^^^^^^^

error: at least one trait must be specified
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-124423.rs:20:25
   |
LL | fn elided2( impl 'b) -> impl 'a + 'a { x }
   |                         ^^^^^^^^^^^^

error: at least one trait must be specified
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-124423.rs:30:35
   |
LL | fn foo<'a>(_: &impl Copy + 'a) -> impl 'b + 'a { x }
   |                                   ^^^^^^^^^^^^

error[E0261]: use of undeclared lifetime name `'a`
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-124423.rs:8:27
   |
LL | fn elided(_: &impl Copy + 'a) -> _ { x }
   |                           ^^ undeclared lifetime
   |
help: consider introducing lifetime `'a` here
   |
LL | fn elided<'a>(_: &impl Copy + 'a) -> _ { x }
   |          ++++

error[E0261]: use of undeclared lifetime name `'a`
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-124423.rs:13:21
   |
LL | fn explicit<'b>(_: &'a impl Copy + 'a) -> impl 'a { x }
   |                     ^^ undeclared lifetime
   |
help: consider introducing lifetime `'a` here
   |
LL | fn explicit<'a, 'b>(_: &'a impl Copy + 'a) -> impl 'a { x }
   |             +++

error[E0261]: use of undeclared lifetime name `'a`
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-124423.rs:13:36
   |
LL | fn explicit<'b>(_: &'a impl Copy + 'a) -> impl 'a { x }
   |                                    ^^ undeclared lifetime
   |
help: consider introducing lifetime `'a` here
   |
LL | fn explicit<'a, 'b>(_: &'a impl Copy + 'a) -> impl 'a { x }
   |             +++

error[E0261]: use of undeclared lifetime name `'a`
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-124423.rs:13:48
   |
LL | fn explicit<'b>(_: &'a impl Copy + 'a) -> impl 'a { x }
   |                                                ^^ undeclared lifetime
   |
help: consider introducing lifetime `'a` here
   |
LL | fn explicit<'a, 'b>(_: &'a impl Copy + 'a) -> impl 'a { x }
   |             +++

error[E0261]: use of undeclared lifetime name `'a`
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-124423.rs:20:30
   |
LL | fn elided2( impl 'b) -> impl 'a + 'a { x }
   |                              ^^ undeclared lifetime
   |
help: consider introducing lifetime `'a` here
   |
LL | fn elided2<'a>( impl 'b) -> impl 'a + 'a { x }
   |           ++++

error[E0261]: use of undeclared lifetime name `'a`
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-124423.rs:20:35
   |
LL | fn elided2( impl 'b) -> impl 'a + 'a { x }
   |                                   ^^ undeclared lifetime
   |
help: consider introducing lifetime `'a` here
   |
LL | fn elided2<'a>( impl 'b) -> impl 'a + 'a { x }
   |           ++++

error[E0261]: use of undeclared lifetime name `'b`
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-124423.rs:30:40
   |
LL | fn foo<'a>(_: &impl Copy + 'a) -> impl 'b + 'a { x }
   |                                        ^^ undeclared lifetime
   |
help: consider introducing lifetime `'b` here
   |
LL | fn foo<'b, 'a>(_: &impl Copy + 'a) -> impl 'b + 'a { x }
   |        +++

error[E0261]: use of undeclared lifetime name `'a`
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-124423.rs:35:28
   |
LL | fn elided3(_: &impl Copy + 'a) -> Box<dyn 'a> { Box::new(x) }
   |                            ^^ undeclared lifetime
   |
help: consider introducing lifetime `'a` here
   |
LL | fn elided3<'a>(_: &impl Copy + 'a) -> Box<dyn 'a> { Box::new(x) }
   |           ++++

error[E0261]: use of undeclared lifetime name `'a`
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-124423.rs:35:43
   |
LL | fn elided3(_: &impl Copy + 'a) -> Box<dyn 'a> { Box::new(x) }
   |                                           ^^ undeclared lifetime
   |
help: consider introducing lifetime `'a` here
   |
LL | fn elided3<'a>(_: &impl Copy + 'a) -> Box<dyn 'a> { Box::new(x) }
   |           ++++

error[E0261]: use of undeclared lifetime name `'a`
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-124423.rs:41:14
   |
LL | fn x<'b>(_: &'a impl Copy + 'a) -> Box<dyn 'b> { Box::u32(x) }
   |              ^^ undeclared lifetime
   |
help: consider introducing lifetime `'a` here
   |
LL | fn x<'a, 'b>(_: &'a impl Copy + 'a) -> Box<dyn 'b> { Box::u32(x) }
   |      +++

error[E0261]: use of undeclared lifetime name `'a`
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-124423.rs:41:29
   |
LL | fn x<'b>(_: &'a impl Copy + 'a) -> Box<dyn 'b> { Box::u32(x) }
   |                             ^^ undeclared lifetime
   |
help: consider introducing lifetime `'a` here
   |
LL | fn x<'a, 'b>(_: &'a impl Copy + 'a) -> Box<dyn 'b> { Box::u32(x) }
   |      +++

error[E0261]: use of undeclared lifetime name `'a`
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-124423.rs:48:28
   |
LL | fn elided4(_: &impl Copy + 'a) ->  new  { x(x) }
   |                            ^^ undeclared lifetime
   |
help: consider introducing lifetime `'a` here
   |
LL | fn elided4<'a>(_: &impl Copy + 'a) ->  new  { x(x) }
   |           ++++

error[E0425]: cannot find type `new` in this scope
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-124423.rs:48:36
   |
LL | fn elided4(_: &impl Copy + 'a) ->  new  { x(x) }
   |                                    ^^^ not found in this scope

error[E0224]: at least one trait is required for an object type
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-124423.rs:55:40
   |
LL | impl<'a> LifetimeTrait<'a> for &'a Box<dyn 'a> {}
   |                                        ^^^^^^

error[E0224]: at least one trait is required for an object type
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-124423.rs:41:40
   |
LL | fn x<'b>(_: &'a impl Copy + 'a) -> Box<dyn 'b> { Box::u32(x) }
   |                                        ^^^^^^

error[E0224]: at least one trait is required for an object type
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-124423.rs:35:39
   |
LL | fn elided3(_: &impl Copy + 'a) -> Box<dyn 'a> { Box::new(x) }
   |                                       ^^^^^^


thread 'rustc query cycle handler' (110813) panicked at compiler/rustc_query_impl/src/job.rs:154:42:
called `Option::unwrap()` on a `None` value
stack backtrace:
   0: __rustc::rust_begin_unwind
   1: core::panicking::panic_fmt
   2: core::panicking::panic
   3: core::option::unwrap_failed
   4: rustc_query_impl::job::abstracted_waiters_of
   5: rustc_query_impl::job::find_cycle
   6: rustc_query_impl::job::break_query_cycle
   7: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#4}::{closure#1}::{closure#1}::{closure#0}, ()>::{closure#0}, ()>
   8: <rustc_middle::ty::context::CurrentGcx>::access::<(), rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#4}::{closure#1}::{closure#1}>
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

error: 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: please make sure that you have updated to the latest nightly

note: rustc 1.97.0-nightly (752691c8a 2026-05-08) running on aarch64-unknown-linux-gnu

note: compiler flags: -Z threads=1 -Z simulate-remapped-rust-src-base=/rustc/FAKE_PREFIX -Z translate-remapped-path-to-local-path=no -Z ignore-directory-in-diagnostics-source-blocks=/cargo -Z ignore-directory-in-diagnostics-source-blocks=/checkout/vendor -C codegen-units=1 -Z ui-testing -Z deduplicate-diagnostics=no -Z write-long-types-to-disk=no -C strip=debuginfo -C prefer-dynamic -C rpath -C debuginfo=0 -Z threads=16

query stack during panic:
end of query stack
internal compiler error: query cycle handler thread panicked, aborting process
------------------------------------------

---- [ui] tests/ui/parallel-rustc/ty-variance-issue-124423.rs stdout end ----
---- [ui] tests/ui/parallel-rustc/ty-variance-issue-127971.rs stdout ----

error: Error: expected failure status (Some(1)) but received status None.
status: signal: 6 (SIGABRT) (core dumped)
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/parallel-rustc/ty-variance-issue-127971.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--check-cfg" "cfg(test,FALSE)" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/parallel-rustc/ty-variance-issue-127971" "-A" "unused" "-W" "unused_attributes" "-A" "internal_features" "-A" "incomplete_features" "-A" "unused_parens" "-A" "unused_braces" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers" "-Z" "threads=16"
stdout: none
--- stderr -------------------------------
error: ambiguous `+` in a type
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-127971.rs:8:15
   |
LL | fn elided(_: &impl Copy + 'a) -> _ { x }
   |               ^^^^^^^^^^^^^^
   |
help: try adding parentheses
   |
LL | fn elided(_: &(impl Copy + 'a)) -> _ { x }
   |               +              +

error: ambiguous `+` in a type
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-127971.rs:13:16
   |
LL | fn foo<'a>(_: &impl Copy + 'a) -> impl 'b + 'a { x }
   |                ^^^^^^^^^^^^^^
   |
help: try adding parentheses
   |
LL | fn foo<'a>(_: &(impl Copy + 'a)) -> impl 'b + 'a { x }
   |                +              +

error: ambiguous `+` in a type
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-127971.rs:18:17
   |
LL | fn x<'b>(_: &'a impl Copy + 'a) -> Box<dyn 'b> { Box::u32(x) }
   |                 ^^^^^^^^^^^^^^
   |
help: try adding parentheses
   |
LL | fn x<'b>(_: &'a (impl Copy + 'a)) -> Box<dyn 'b> { Box::u32(x) }
   |                 +              +

error: at least one trait must be specified
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-127971.rs:13:35
   |
LL | fn foo<'a>(_: &impl Copy + 'a) -> impl 'b + 'a { x }
   |                                   ^^^^^^^^^^^^

error[E0261]: use of undeclared lifetime name `'a`
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-127971.rs:8:27
   |
LL | fn elided(_: &impl Copy + 'a) -> _ { x }
   |                           ^^ undeclared lifetime
   |
help: consider introducing lifetime `'a` here
   |
LL | fn elided<'a>(_: &impl Copy + 'a) -> _ { x }
   |          ++++

error[E0261]: use of undeclared lifetime name `'b`
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-127971.rs:13:40
   |
LL | fn foo<'a>(_: &impl Copy + 'a) -> impl 'b + 'a { x }
   |                                        ^^ undeclared lifetime
   |
help: consider introducing lifetime `'b` here
   |
LL | fn foo<'b, 'a>(_: &impl Copy + 'a) -> impl 'b + 'a { x }
   |        +++

error[E0261]: use of undeclared lifetime name `'a`
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-127971.rs:18:14
   |
LL | fn x<'b>(_: &'a impl Copy + 'a) -> Box<dyn 'b> { Box::u32(x) }
   |              ^^ undeclared lifetime
   |
help: consider introducing lifetime `'a` here
   |
LL | fn x<'a, 'b>(_: &'a impl Copy + 'a) -> Box<dyn 'b> { Box::u32(x) }
   |      +++

error[E0261]: use of undeclared lifetime name `'a`
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-127971.rs:18:29
   |
LL | fn x<'b>(_: &'a impl Copy + 'a) -> Box<dyn 'b> { Box::u32(x) }
   |                             ^^ undeclared lifetime
   |
help: consider introducing lifetime `'a` here
   |
LL | fn x<'a, 'b>(_: &'a impl Copy + 'a) -> Box<dyn 'b> { Box::u32(x) }
   |      +++

error[E0224]: at least one trait is required for an object type
##[error]  --> /checkout/tests/ui/parallel-rustc/ty-variance-issue-127971.rs:18:40
   |
LL | fn x<'b>(_: &'a impl Copy + 'a) -> Box<dyn 'b> { Box::u32(x) }
   |                                        ^^^^^^


thread 'rustc query cycle handler' (110814) panicked at compiler/rustc_query_impl/src/job.rs:154:42:
called `Option::unwrap()` on a `None` value
stack backtrace:
   0: __rustc::rust_begin_unwind
   1: core::panicking::panic_fmt
   2: core::panicking::panic
   3: core::option::unwrap_failed
   4: rustc_query_impl::job::abstracted_waiters_of
   5: rustc_query_impl::job::find_cycle
   6: rustc_query_impl::job::find_cycle
   7: rustc_query_impl::job::break_query_cycle
   8: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#4}::{closure#1}::{closure#1}::{closure#0}, ()>::{closure#0}, ()>
   9: <rustc_middle::ty::context::CurrentGcx>::access::<(), rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#4}::{closure#1}::{closure#1}>
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

error: 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: please make sure that you have updated to the latest nightly

note: rustc 1.97.0-nightly (752691c8a 2026-05-08) running on aarch64-unknown-linux-gnu

note: compiler flags: -Z threads=1 -Z simulate-remapped-rust-src-base=/rustc/FAKE_PREFIX -Z translate-remapped-path-to-local-path=no -Z ignore-directory-in-diagnostics-source-blocks=/cargo -Z ignore-directory-in-diagnostics-source-blocks=/checkout/vendor -C codegen-units=1 -Z ui-testing -Z deduplicate-diagnostics=no -Z write-long-types-to-disk=no -C strip=debuginfo -C prefer-dynamic -C rpath -C debuginfo=0 -Z threads=16

query stack during panic:
end of query stack
internal compiler error: query cycle handler thread panicked, aborting process
------------------------------------------

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A-query-system Area: The rustc query system (https://rustc-dev-guide.rust-lang.org/query.html) S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.

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