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ICE: const parameters cannot be generic #113462

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matthiaskrgr opened this issue Jul 7, 2023 · 1 comment · Fixed by #114606
Closed

ICE: const parameters cannot be generic #113462

matthiaskrgr opened this issue Jul 7, 2023 · 1 comment · Fixed by #114606
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C-bug Category: This is a bug. glacier ICE tracked in rust-lang/glacier. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.

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Code

#[derive(Default)]
struct NonGeneric<'a, const N: NonGeneric> {}

Meta

rustc --version --verbose:

rustc 1.72.0-nightly (85bf07972 2023-07-06)
binary: rustc
commit-hash: 85bf07972a1041b9e25393b803d0e006bec3eaaf
commit-date: 2023-07-06
host: x86_64-unknown-linux-gnu
release: 1.72.0-nightly
LLVM version: 16.0.5

Error output

error[E0106]: missing lifetime specifier
 --> treereduce.out:2:32
  |
2 | struct NonGeneric<'a, const N: NonGeneric> {}
  |                                ^^^^^^^^^^ expected named lifetime parameter
  |
help: consider using the `'a` lifetime
  |
2 | struct NonGeneric<'a, const N: NonGeneric<'a>> {}
  |                                          ++++

error[E0601]: `main` function not found in crate `treereduce`
 --> treereduce.out:2:46
  |
2 | struct NonGeneric<'a, const N: NonGeneric> {}
  |                                              ^ consider adding a `main` function to `treereduce.out`

error[E0107]: missing generics for struct `NonGeneric`
 --> treereduce.out:2:32
  |
2 | struct NonGeneric<'a, const N: NonGeneric> {}
  |                                ^^^^^^^^^^ expected 1 generic argument
  |
note: struct defined here, with 1 generic parameter: `N`
 --> treereduce.out:2:8
  |
2 | struct NonGeneric<'a, const N: NonGeneric> {}
  |        ^^^^^^^^^^     -------------------
help: add missing generic argument
  |
2 | struct NonGeneric<'a, const N: NonGeneric<N>> {}
  |                                          +++

error[E0391]: cycle detected when computing type of `NonGeneric::N`
 --> treereduce.out:2:32
  |
2 | struct NonGeneric<'a, const N: NonGeneric> {}
  |                                ^^^^^^^^^^
  |
  = note: ...which immediately requires computing type of `NonGeneric::N` again
note: cycle used when computing type of `NonGeneric`
 --> treereduce.out:2:1
  |
2 | struct NonGeneric<'a, const N: NonGeneric> {}
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error[E0391]: cycle detected when computing type of `NonGeneric`
 --> treereduce.out:2:1
  |
2 | struct NonGeneric<'a, const N: NonGeneric> {}
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
note: ...which requires computing type of `NonGeneric::N`...
 --> treereduce.out:2:32
  |
2 | struct NonGeneric<'a, const N: NonGeneric> {}
  |                                ^^^^^^^^^^
  = note: ...which again requires computing type of `NonGeneric`, completing the cycle
note: cycle used when collecting item types in top-level module
 --> treereduce.out:1:1
  |
1 | / #[derive(Default)]
2 | | struct NonGeneric<'a, const N: NonGeneric> {}
  | |_____________________________________________^
Backtrace 

thread 'rustc' panicked at 'const parameters cannot be generic', compiler/rustc_hir_analysis/src/collect/predicates_of.rs:249:22
stack backtrace:
   0:     0x7fa5a7211a71 - std::backtrace_rs::backtrace::libunwind::trace::h83338e21cbc3510e
                               at /rustc/85bf07972a1041b9e25393b803d0e006bec3eaaf/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7fa5a7211a71 - std::backtrace_rs::backtrace::trace_unsynchronized::h1663b95366fea7e1
                               at /rustc/85bf07972a1041b9e25393b803d0e006bec3eaaf/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7fa5a7211a71 - std::sys_common::backtrace::_print_fmt::hcb919a5390faff94
                               at /rustc/85bf07972a1041b9e25393b803d0e006bec3eaaf/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7fa5a7211a71 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::ha8e8379de0738990
                               at /rustc/85bf07972a1041b9e25393b803d0e006bec3eaaf/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7fa5a7277d7f - core::fmt::rt::Argument::fmt::h12cd44e59c3e03f4
                               at /rustc/85bf07972a1041b9e25393b803d0e006bec3eaaf/library/core/src/fmt/rt.rs:138:9
   5:     0x7fa5a7277d7f - core::fmt::write::h0d2b2a94b10f259a
                               at /rustc/85bf07972a1041b9e25393b803d0e006bec3eaaf/library/core/src/fmt/mod.rs:1094:21
   6:     0x7fa5a72044b7 - std::io::Write::write_fmt::hf16cae54d031f42c
                               at /rustc/85bf07972a1041b9e25393b803d0e006bec3eaaf/library/std/src/io/mod.rs:1714:15
   7:     0x7fa5a7211885 - std::sys_common::backtrace::_print::h7c194ea6232bf362
                               at /rustc/85bf07972a1041b9e25393b803d0e006bec3eaaf/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7fa5a7211885 - std::sys_common::backtrace::print::hca89cc4c64fa92f2
                               at /rustc/85bf07972a1041b9e25393b803d0e006bec3eaaf/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7fa5a7214663 - std::panicking::default_hook::{{closure}}::hba1423900118f107
                               at /rustc/85bf07972a1041b9e25393b803d0e006bec3eaaf/library/std/src/panicking.rs:269:22
  10:     0x7fa5a72143f4 - std::panicking::default_hook::hf4868ae8eb550432
                               at /rustc/85bf07972a1041b9e25393b803d0e006bec3eaaf/library/std/src/panicking.rs:288:9
  11:     0x7fa5a607d65b - rustc_driver_impl[5fd2fff4e2ab1b68]::install_ice_hook::{closure#0}
  12:     0x7fa5a7214e8e - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h2d28fdec3189af27
                               at /rustc/85bf07972a1041b9e25393b803d0e006bec3eaaf/library/alloc/src/boxed.rs:2024:9
  13:     0x7fa5a7214e8e - std::panicking::rust_panic_with_hook::hdb6e4003315ae50a
                               at /rustc/85bf07972a1041b9e25393b803d0e006bec3eaaf/library/std/src/panicking.rs:709:13
  14:     0x7fa5a7214c17 - std::panicking::begin_panic_handler::{{closure}}::h05675051fb0f9296
                               at /rustc/85bf07972a1041b9e25393b803d0e006bec3eaaf/library/std/src/panicking.rs:597:13
  15:     0x7fa5a7211ed6 - std::sys_common::backtrace::__rust_end_short_backtrace::h9866f6ab4fcd5803
                               at /rustc/85bf07972a1041b9e25393b803d0e006bec3eaaf/library/std/src/sys_common/backtrace.rs:151:18
  16:     0x7fa5a7214962 - rust_begin_unwind
                               at /rustc/85bf07972a1041b9e25393b803d0e006bec3eaaf/library/std/src/panicking.rs:593:5
  17:     0x7fa5a7273fd3 - core::panicking::panic_fmt::h1490cb3aae65fe17
                               at /rustc/85bf07972a1041b9e25393b803d0e006bec3eaaf/library/core/src/panicking.rs:67:14
  18:     0x7fa5a7273d33 - core::panicking::panic_display::h09a137dc2025c35c
                               at /rustc/85bf07972a1041b9e25393b803d0e006bec3eaaf/library/core/src/panicking.rs:150:5
  19:     0x7fa5a7273d33 - core::panicking::panic_str::h867e2cb6f4418dd2
                               at /rustc/85bf07972a1041b9e25393b803d0e006bec3eaaf/library/core/src/panicking.rs:134:5
  20:     0x7fa5a7273d33 - core::option::expect_failed::h3aed3553b6e847cc
                               at /rustc/85bf07972a1041b9e25393b803d0e006bec3eaaf/library/core/src/option.rs:1952:5
  21:     0x7fa5a51a4f01 - rustc_hir_analysis[ac41804801612bf5]::collect::predicates_of::gather_explicit_predicates_of
  22:     0x7fa5a4373dd8 - rustc_query_impl[a5debbf18c9cda01]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a5debbf18c9cda01]::query_impl::explicit_predicates_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle[6a835cc3e0a555e0]::query::erase::Erased<[u8; 24usize]>>
  23:     0x7fa5a41469b6 - rustc_query_system[9a6651a6b626ed91]::query::plumbing::try_execute_query::<rustc_query_impl[a5debbf18c9cda01]::DynamicConfig<rustc_query_system[9a6651a6b626ed91]::query::caches::DefaultCache<rustc_span[330d20617ff3531a]::def_id::DefId, rustc_middle[6a835cc3e0a555e0]::query::erase::Erased<[u8; 24usize]>>, false, false, false>, rustc_query_impl[a5debbf18c9cda01]::plumbing::QueryCtxt, false>
  24:     0x7fa5a414663f - rustc_query_impl[a5debbf18c9cda01]::query_impl::explicit_predicates_of::get_query_non_incr::__rust_end_short_backtrace
  25:     0x7fa5a58cbe8a - rustc_hir_analysis[ac41804801612bf5]::collect::predicates_defined_on
  26:     0x7fa5a403334d - rustc_query_impl[a5debbf18c9cda01]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a5debbf18c9cda01]::query_impl::predicates_defined_on::dynamic_query::{closure#2}::{closure#0}, rustc_middle[6a835cc3e0a555e0]::query::erase::Erased<[u8; 24usize]>>
  27:     0x7fa5a4146ca0 - rustc_query_system[9a6651a6b626ed91]::query::plumbing::try_execute_query::<rustc_query_impl[a5debbf18c9cda01]::DynamicConfig<rustc_query_system[9a6651a6b626ed91]::query::caches::DefaultCache<rustc_span[330d20617ff3531a]::def_id::DefId, rustc_middle[6a835cc3e0a555e0]::query::erase::Erased<[u8; 24usize]>>, false, false, false>, rustc_query_impl[a5debbf18c9cda01]::plumbing::QueryCtxt, false>
  28:     0x7fa5a59f8d5f - rustc_query_impl[a5debbf18c9cda01]::query_impl::predicates_defined_on::get_query_non_incr::__rust_end_short_backtrace
  29:     0x7fa5a55406ea - rustc_hir_analysis[ac41804801612bf5]::collect::predicates_of::predicates_of
  30:     0x7fa5a40333bd - rustc_query_impl[a5debbf18c9cda01]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a5debbf18c9cda01]::query_impl::predicates_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle[6a835cc3e0a555e0]::query::erase::Erased<[u8; 24usize]>>
  31:     0x7fa5a414698a - rustc_query_system[9a6651a6b626ed91]::query::plumbing::try_execute_query::<rustc_query_impl[a5debbf18c9cda01]::DynamicConfig<rustc_query_system[9a6651a6b626ed91]::query::caches::DefaultCache<rustc_span[330d20617ff3531a]::def_id::DefId, rustc_middle[6a835cc3e0a555e0]::query::erase::Erased<[u8; 24usize]>>, false, false, false>, rustc_query_impl[a5debbf18c9cda01]::plumbing::QueryCtxt, false>
  32:     0x7fa5a59d1e9f - rustc_query_impl[a5debbf18c9cda01]::query_impl::predicates_of::get_query_non_incr::__rust_end_short_backtrace
  33:     0x7fa5a46cbcdb - <rustc_hir_analysis[ac41804801612bf5]::collect::CollectItemTypesVisitor as rustc_hir[10c9f4f629fa886a]::intravisit::Visitor>::visit_item
  34:     0x7fa5a46c9184 - <rustc_middle[6a835cc3e0a555e0]::hir::map::Map>::visit_item_likes_in_module::<rustc_hir_analysis[ac41804801612bf5]::collect::CollectItemTypesVisitor>
  35:     0x7fa5a46c909c - rustc_hir_analysis[ac41804801612bf5]::collect::collect_mod_item_types
  36:     0x7fa5a4ce67ec - rustc_query_impl[a5debbf18c9cda01]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a5debbf18c9cda01]::query_impl::collect_mod_item_types::dynamic_query::{closure#2}::{closure#0}, rustc_middle[6a835cc3e0a555e0]::query::erase::Erased<[u8; 0usize]>>
  37:     0x7fa5a4ce67ce - <rustc_query_impl[a5debbf18c9cda01]::query_impl::collect_mod_item_types::dynamic_query::{closure#2} as core[bcc6c1a0d905112a]::ops::function::FnOnce<(rustc_middle[6a835cc3e0a555e0]::ty::context::TyCtxt, rustc_span[330d20617ff3531a]::def_id::LocalDefId)>>::call_once
  38:     0x7fa5a46ebf0f - rustc_query_system[9a6651a6b626ed91]::query::plumbing::try_execute_query::<rustc_query_impl[a5debbf18c9cda01]::DynamicConfig<rustc_query_system[9a6651a6b626ed91]::query::caches::VecCache<rustc_span[330d20617ff3531a]::def_id::LocalDefId, rustc_middle[6a835cc3e0a555e0]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[a5debbf18c9cda01]::plumbing::QueryCtxt, false>
  39:     0x7fa5a59e8834 - rustc_query_impl[a5debbf18c9cda01]::query_impl::collect_mod_item_types::get_query_non_incr::__rust_end_short_backtrace
  40:     0x7fa5a549ddd7 - <rustc_middle[6a835cc3e0a555e0]::hir::map::Map>::for_each_module::<rustc_hir_analysis[ac41804801612bf5]::check_crate::{closure#0}::{closure#0}::{closure#0}>
  41:     0x7fa5a549da12 - <rustc_session[ab778da52d62d91c]::session::Session>::track_errors::<rustc_hir_analysis[ac41804801612bf5]::check_crate::{closure#0}, ()>
  42:     0x7fa5a549c1d1 - rustc_hir_analysis[ac41804801612bf5]::check_crate
  43:     0x7fa5a54932ea - rustc_interface[99b7bac6f3a68274]::passes::analysis
  44:     0x7fa5a552d80a - rustc_query_impl[a5debbf18c9cda01]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a5debbf18c9cda01]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[6a835cc3e0a555e0]::query::erase::Erased<[u8; 1usize]>>
  45:     0x7fa5a552d7f9 - <rustc_query_impl[a5debbf18c9cda01]::query_impl::analysis::dynamic_query::{closure#2} as core[bcc6c1a0d905112a]::ops::function::FnOnce<(rustc_middle[6a835cc3e0a555e0]::ty::context::TyCtxt, ())>>::call_once
  46:     0x7fa5a56aba98 - rustc_query_system[9a6651a6b626ed91]::query::plumbing::try_execute_query::<rustc_query_impl[a5debbf18c9cda01]::DynamicConfig<rustc_query_system[9a6651a6b626ed91]::query::caches::SingleCache<rustc_middle[6a835cc3e0a555e0]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[a5debbf18c9cda01]::plumbing::QueryCtxt, false>
  47:     0x7fa5a56ab869 - rustc_query_impl[a5debbf18c9cda01]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  48:     0x7fa5a5268a05 - <rustc_middle[6a835cc3e0a555e0]::ty::context::GlobalCtxt>::enter::<rustc_driver_impl[5fd2fff4e2ab1b68]::run_compiler::{closure#1}::{closure#2}::{closure#4}, core[bcc6c1a0d905112a]::result::Result<(), rustc_span[330d20617ff3531a]::ErrorGuaranteed>>
  49:     0x7fa5a5268032 - <rustc_interface[99b7bac6f3a68274]::interface::Compiler>::enter::<rustc_driver_impl[5fd2fff4e2ab1b68]::run_compiler::{closure#1}::{closure#2}, core[bcc6c1a0d905112a]::result::Result<core[bcc6c1a0d905112a]::option::Option<rustc_interface[99b7bac6f3a68274]::queries::Linker>, rustc_span[330d20617ff3531a]::ErrorGuaranteed>>
  50:     0x7fa5a525ed45 - rustc_span[330d20617ff3531a]::set_source_map::<core[bcc6c1a0d905112a]::result::Result<(), rustc_span[330d20617ff3531a]::ErrorGuaranteed>, rustc_interface[99b7bac6f3a68274]::interface::run_compiler<core[bcc6c1a0d905112a]::result::Result<(), rustc_span[330d20617ff3531a]::ErrorGuaranteed>, rustc_driver_impl[5fd2fff4e2ab1b68]::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
  51:     0x7fa5a525e7b6 - <scoped_tls[df29aac8beac7397]::ScopedKey<rustc_span[330d20617ff3531a]::SessionGlobals>>::set::<rustc_interface[99b7bac6f3a68274]::interface::run_compiler<core[bcc6c1a0d905112a]::result::Result<(), rustc_span[330d20617ff3531a]::ErrorGuaranteed>, rustc_driver_impl[5fd2fff4e2ab1b68]::run_compiler::{closure#1}>::{closure#0}, core[bcc6c1a0d905112a]::result::Result<(), rustc_span[330d20617ff3531a]::ErrorGuaranteed>>
  52:     0x7fa5a525dd7c - std[6f71ef261950bfb1]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[99b7bac6f3a68274]::util::run_in_thread_pool_with_globals<rustc_interface[99b7bac6f3a68274]::interface::run_compiler<core[bcc6c1a0d905112a]::result::Result<(), rustc_span[330d20617ff3531a]::ErrorGuaranteed>, rustc_driver_impl[5fd2fff4e2ab1b68]::run_compiler::{closure#1}>::{closure#0}, core[bcc6c1a0d905112a]::result::Result<(), rustc_span[330d20617ff3531a]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[bcc6c1a0d905112a]::result::Result<(), rustc_span[330d20617ff3531a]::ErrorGuaranteed>>
  53:     0x7fa5a525db45 - <<std[6f71ef261950bfb1]::thread::Builder>::spawn_unchecked_<rustc_interface[99b7bac6f3a68274]::util::run_in_thread_pool_with_globals<rustc_interface[99b7bac6f3a68274]::interface::run_compiler<core[bcc6c1a0d905112a]::result::Result<(), rustc_span[330d20617ff3531a]::ErrorGuaranteed>, rustc_driver_impl[5fd2fff4e2ab1b68]::run_compiler::{closure#1}>::{closure#0}, core[bcc6c1a0d905112a]::result::Result<(), rustc_span[330d20617ff3531a]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[bcc6c1a0d905112a]::result::Result<(), rustc_span[330d20617ff3531a]::ErrorGuaranteed>>::{closure#1} as core[bcc6c1a0d905112a]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  54:     0x7fa5a721f305 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hee94a9b600b92b27
                               at /rustc/85bf07972a1041b9e25393b803d0e006bec3eaaf/library/alloc/src/boxed.rs:2010:9
  55:     0x7fa5a721f305 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hb557fd709dd3520f
                               at /rustc/85bf07972a1041b9e25393b803d0e006bec3eaaf/library/alloc/src/boxed.rs:2010:9
  56:     0x7fa5a721f305 - std::sys::unix::thread::Thread::new::thread_start::h726c141aa23b2e83
                               at /rustc/85bf07972a1041b9e25393b803d0e006bec3eaaf/library/std/src/sys/unix/thread.rs:108:17
  57:     0x7fa5a2c6444b - <unknown>
  58:     0x7fa5a2ce7e40 - <unknown>
  59:                0x0 - <unknown>

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: rustc 1.72.0-nightly (85bf07972 2023-07-06) running on x86_64-unknown-linux-gnu

query stack during panic:
#0 [explicit_predicates_of] computing explicit predicates of `<impl at treereduce.out:1:10: 1:17>`
#1 [predicates_defined_on] computing predicates of `<impl at treereduce.out:1:10: 1:17>`
#2 [predicates_of] computing predicates of `<impl at treereduce.out:1:10: 1:17>`
#3 [collect_mod_item_types] collecting item types in top-level module
#4 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to 5 previous errors

Some errors have detailed explanations: E0106, E0107, E0391, E0601.
For more information about an error, try `rustc --explain E0106`.

@matthiaskrgr matthiaskrgr added I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. C-bug Category: This is a bug. labels Jul 7, 2023
@clubby789
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searched nightlies: from nightly-2023-02-17 to nightly-2023-02-19
regressed nightly: nightly-2023-02-18
searched commit range: 9a7cc6c...9aa5c24
regressed commit: 9556b56 -> #107753 -> cc @kylematsuda

bisected with cargo-bisect-rustc v0.6.6

Host triple: x86_64-unknown-linux-gnu
Reproduce with:

cargo bisect-rustc --start 2023-01-01 --prompt

@rust-lang-glacier-bot rust-lang-glacier-bot added the glacier ICE tracked in rust-lang/glacier. label Jul 14, 2023
@bvanjoi bvanjoi mentioned this issue Aug 8, 2023
Merged
Dylan-DPC added a commit to Dylan-DPC/rust that referenced this issue Aug 8, 2023
@Dylan-DPC
Rollup merge of rust-lang#114606 - bvanjoi:fix-113462, r=compiler-errors
50810a5 
fix: not insert missing lifetime for `ConstParamTy`

Fixes rust-lang#113462

We should ignore the missing lifetime, as it's illegal to include a lifetime in a const param.

r? `@compiler-errors`
@bors bors closed this as completed in 41d2694 Aug 9, 2023
@github-actions github-actions bot mentioned this issue Aug 10, 2023
Merged
@github-actions github-actions bot mentioned this issue Sep 17, 2023
Open
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C-bug Category: This is a bug. glacier ICE tracked in rust-lang/glacier. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
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fix: not insert missing lifetime for ConstParamTy bvanjoi/rust
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