jiebi/CodeConvo huggingface dataset:
Code change:
<!-- Thank you for filing a bug report! Please provide a short summary of the bug, along with any information you feel relevant to replicating the bug. --I tried this code: I expected to see this happen: The program terminates. Instead, this happened: The program loops indefinitely. I encountered this while working on <!-- If you're using the stable version of the compiler, you should also check if the bug also exists in the beta or nightly versions. --:
Hangs here: label I-hang
CC
Thanks for the report. Priority wise, this seems like it isn’t going to be super high priority to resolve, given that 1<<47 is 128TiB. 128TiB, unfortunately, is half of the maximum supported address space on many modern x8664 and aarch64 deployments, so it is conceivable that this could be actually hit. Still would be nice to actually fix it. As for the strategies to fix this, there are a couple of approaches to consider: could store the into a u128 (2 usize on any supported platform today.) This is not super future-proof, and unfortunately probably somewhat more costly in the non-const-evaluated case. could use instead of . When overflows on the last iteration, it will become the maximum value that fits in and the termination condition will be hit. Not super clear what codegen quality implications are for using saturatingmul; a widening/checked multiplication and additionally compare the high bits for in the terminating condition. This is an alteration of 1. I suspect this is going to produce the best code, but that remains to be seen.
Would it work to change the termination condition from to ? Where means it wrapped, so the logical value is out of the type's range, and thus bigger than .
Or weirder: store instead of , so the comparison can be done using and the squaring operation can be replaced with a doubling (bit shift).

Related discussion:
text: // FIXME(#75598): Direct use of these intrinsics improves codegen significantly at opt-level <= // 1, where the method versions of these operations are not inlined. use intrinsics::{ <del> cttz_nonzero, exact_div, unchecked_rem, unchecked_shl, unchecked_shr, unchecked_sub, wrapping_add, wrapping_mul, wrapping_sub, </del> <ins> cttz_nonzero, exact_div, mul_with_overflow, unchecked_rem, unchecked_shl, unchecked_shr, unchecked_sub, wrapping_add, wrapping_mul, wrapping_sub, </ins> }; /// Calculate multiplicative modular inverse of `x` modulo `m`.
Code change:
<!-- Thank you for filing a bug report! Please provide a short summary of the bug, along with any information you feel relevant to replicating the bug. --I tried this code: I expected to see this happen: The program terminates. Instead, this happened: The program loops indefinitely. I encountered this while working on <!-- If you're using the stable version of the compiler, you should also check if the bug also exists in the beta or nightly versions. --:
Hangs here: label I-hang
CC
Thanks for the report. Priority wise, this seems like it isn’t going to be super high priority to resolve, given that 1<<47 is 128TiB. 128TiB, unfortunately, is half of the maximum supported address space on many modern x8664 and aarch64 deployments, so it is conceivable that this could be actually hit. Still would be nice to actually fix it. As for the strategies to fix this, there are a couple of approaches to consider: could store the into a u128 (2 usize on any supported platform today.) This is not super future-proof, and unfortunately probably somewhat more costly in the non-const-evaluated case. could use instead of . When overflows on the last iteration, it will become the maximum value that fits in and the termination condition will be hit. Not super clear what codegen quality implications are for using saturatingmul; a widening/checked multiplication and additionally compare the high bits for in the terminating condition. This is an alteration of 1. I suspect this is going to produce the best code, but that remains to be seen.
Would it work to change the termination condition from to ? Where means it wrapped, so the logical value is out of the type's range, and thus bigger than .
Or weirder: store instead of , so the comparison can be done using and the squaring operation can be replaced with a doubling (bit shift).

Related discussion:
text: } #[test] <ins> fn align_offset_issue_103361() { #[cfg(target_pointer_width = "64")] const SIZE: usize = 1 << 47; #[cfg(target_pointer_width = "32")] const SIZE: usize = 1 << 30; #[cfg(target_pointer_width = "16")] const SIZE: usize = 1 << 13; struct HugeSize([u8; SIZE - 1]); let _ = (SIZE as *const HugeSize).align_offset(SIZE); } #[test] </ins> fn offset_from() { let mut a = [0; 5]; let ptr1: *mut i32 = &mut a[1];
Code change:
: Fails on nightly 1.66.0 but not on stable 1.64.0. <details<summary<strongBacktrace</strong</summary<p</p</detailsEdited: minified the code
Also ICEs on beta
stable error -beta ICE I tried moving things around so lifetime is on , but that's fine. This also requires the lifetime .
Going to preemptively assign P-medium, since this code isn't correct anyways. I think this has something to do with our error recovery here, since this valid code is fine, which only changes the trait:
I got a fix here.

Related discussion:
text: add_constraints(&infcx, region_bound_pairs); <ins> infcx.process_registered_region_obligations( outlives_environment.region_bound_pairs(), param_env, ); </ins> let errors = infcx.resolve_regions(&outlives_environment); debug!(?errors, "errors");
Code change:
: Fails on nightly 1.66.0 but not on stable 1.64.0. <details<summary<strongBacktrace</strong</summary<p</p</detailsEdited: minified the code
Also ICEs on beta
stable error -beta ICE I tried moving things around so lifetime is on , but that's fine. This also requires the lifetime .
Going to preemptively assign P-medium, since this code isn't correct anyways. I think this has something to do with our error recovery here, since this valid code is fine, which only changes the trait:
I got a fix here.

Related discussion:
text: <ins> trait TraitA { type TypeA; } trait TraitD { type TypeD; } pub trait TraitB { type TypeB: TraitD; fn f(_: &<Self::TypeB as TraitD>::TypeD); } pub trait TraitC<E> { type TypeC<'a>: TraitB; fn g<'a>(_: &<<Self::TypeC<'a> as TraitB>::TypeB as TraitA>::TypeA); //~^ ERROR the trait bound `<<Self as TraitC<E>>::TypeC<'a> as TraitB>::TypeB: TraitA` is not satisfied } fn main() {} </ins>
Code change:
: Fails on nightly 1.66.0 but not on stable 1.64.0. <details<summary<strongBacktrace</strong</summary<p</p</detailsEdited: minified the code
Also ICEs on beta
stable error -beta ICE I tried moving things around so lifetime is on , but that's fine. This also requires the lifetime .
Going to preemptively assign P-medium, since this code isn't correct anyways. I think this has something to do with our error recovery here, since this valid code is fine, which only changes the trait:
I got a fix here.

Related discussion:
text: <ins> error[E0277]: the trait bound `<<Self as TraitC<E>>::TypeC<'a> as TraitB>::TypeB: TraitA` is not satisfied --> $DIR/issue-103573.rs:18:5 | LL |     fn g<'a>(_: &<<Self::TypeC<'a> as TraitB>::TypeB as TraitA>::TypeA); |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `TraitA` is not implemented for `<<Self as TraitC<E>>::TypeC<'a> as TraitB>::TypeB` | help: consider further restricting the associated type | LL |     fn g<'a>(_: &<<Self::TypeC<'a> as TraitB>::TypeB as TraitA>::TypeA) where <<Self as TraitC<E>>::TypeC<'a> as TraitB>::TypeB: TraitA; |                                                                         +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ error: aborting due to previous error For more information about this error, try `rustc --explain E0277`. </ins>
Code change:
Our CI system building artifact for aarch64 with the release of Rust 1.65 I tried to reduce the bug a bit: dependencies Build with (same with ) Since Rust 1.65, we get this error: Can still be reproduced in nightly
I wasn't able to reproduce this (on either stable or nightly).
You're right, trying in a fresh project i couldn't reproduce. I realized the original also contained a that was also necessary I edited the original description to add Thanks for looking into this.
Also, contrary to what i wrote initially, the bug appeared first in 1.65 (and not 1.64)
Thanks, I can reproduce the issue now. Reduced test case:
Upstream issue:
The upstream issue appears to be fixed. What needs to be done now to apply this fix?
I can still reproduce this on 1.68.0-nightly ( 2022-12-15).
Can confirm that the issue still exists.
New upstream issue:

Related discussion:
text: [submodule "src/llvm-project"] path = src/llvm-project url = https://github.com/rust-lang/llvm-project.git <del> branch = rustc/15.0-2022-08-09 </del> <ins> branch = rustc/15.0-2022-12-07 </ins> [submodule "src/doc/embedded-book"] path = src/doc/embedded-book url = https://github.com/rust-embedded/book.git
Code change:
Our CI system building artifact for aarch64 with the release of Rust 1.65 I tried to reduce the bug a bit: dependencies Build with (same with ) Since Rust 1.65, we get this error: Can still be reproduced in nightly
I wasn't able to reproduce this (on either stable or nightly).
You're right, trying in a fresh project i couldn't reproduce. I realized the original also contained a that was also necessary I edited the original description to add Thanks for looking into this.
Also, contrary to what i wrote initially, the bug appeared first in 1.65 (and not 1.64)
Thanks, I can reproduce the issue now. Reduced test case:
Upstream issue:
The upstream issue appears to be fixed. What needs to be done now to apply this fix?
I can still reproduce this on 1.68.0-nightly ( 2022-12-15).
Can confirm that the issue still exists.
New upstream issue:

Related discussion:
text: <del> Subproject commit a1232c451fc27173f8718e05d174b2503ca0b607 </del> <ins> Subproject commit 3dfd4d93fa013e1c0578d3ceac5c8f4ebba4b6ec </ins>
Code change:
Our CI system building artifact for aarch64 with the release of Rust 1.65 I tried to reduce the bug a bit: dependencies Build with (same with ) Since Rust 1.65, we get this error: Can still be reproduced in nightly
I wasn't able to reproduce this (on either stable or nightly).
You're right, trying in a fresh project i couldn't reproduce. I realized the original also contained a that was also necessary I edited the original description to add Thanks for looking into this.
Also, contrary to what i wrote initially, the bug appeared first in 1.65 (and not 1.64)
Thanks, I can reproduce the issue now. Reduced test case:
Upstream issue:
The upstream issue appears to be fixed. What needs to be done now to apply this fix?
I can still reproduce this on 1.68.0-nightly ( 2022-12-15).
Can confirm that the issue still exists.
New upstream issue:

Related discussion:
text: <del> Subproject commit 3dfd4d93fa013e1c0578d3ceac5c8f4ebba4b6ec </del> <ins> Subproject commit 9ad24035fea8d309753f5e39e6eb53d1d0eb39ce </ins>
Code change:
<details<summary<bbacktrace</b</summary</details<details<summary<bfull stderr (two panics / backtraces)</b</summary</details: label requires-nightly A-associated-items F-inherentassociatedtypes
Context: The recent PR implemented the resolution of inherent associated types but it appears that parameter substitution was overlooked.

Related discussion:
text: assert!(self_ty.is_some()); } } else { <del> assert!(self_ty.is_none() && parent_substs.is_empty()); </del> <ins> assert!(self_ty.is_none()); </ins> } let arg_count = Self::check_generic_arg_count(
Code change:
<details<summary<bbacktrace</b</summary</details<details<summary<bfull stderr (two panics / backtraces)</b</summary</details: label requires-nightly A-associated-items F-inherentassociatedtypes
Context: The recent PR implemented the resolution of inherent associated types but it appears that parameter substitution was overlooked.

Related discussion:
text: // Check if we have an enum variant. let mut variant_resolution = None; <del> if let ty::Adt(adt_def, _) = qself_ty.kind() { </del> <ins> if let ty::Adt(adt_def, adt_substs) = qself_ty.kind() { </ins> if adt_def.is_enum() { let variant_def = adt_def .variants()
Code change:
<details<summary<bbacktrace</b</summary</details<details<summary<bfull stderr (two panics / backtraces)</b</summary</details: label requires-nightly A-associated-items F-inherentassociatedtypes
Context: The recent PR implemented the resolution of inherent associated types but it appears that parameter substitution was overlooked.

Related discussion:
text: let Some(assoc_ty_did) = self.lookup_assoc_ty(assoc_ident, hir_ref_id, span, impl_) else { continue; }; <del> // FIXME(inherent_associated_types): This does not substitute parameters. let ty = tcx.type_of(assoc_ty_did); </del> <ins> let item_substs = self.create_substs_for_associated_item( span, assoc_ty_did, assoc_segment, adt_substs, ); let ty = tcx.bound_type_of(assoc_ty_did).subst(tcx, item_substs); </ins> return Ok((ty, DefKind::AssocTy, assoc_ty_did)); } }
Code change:
<details<summary<bbacktrace</b</summary</details<details<summary<bfull stderr (two panics / backtraces)</b</summary</details: label requires-nightly A-associated-items F-inherentassociatedtypes
Context: The recent PR implemented the resolution of inherent associated types but it appears that parameter substitution was overlooked.

Related discussion:
text: <ins> // check-pass #![feature(inherent_associated_types)] #![allow(incomplete_features)] struct S<T>(T); impl<T> S<T> { type P = T; } fn main() { type A = S<()>::P; let _: A = (); } </ins>
Code change:
In the following code, I can successfully refer to the private inherent associated type : I expected to see an error denying the access. If the associated item was a constant, this would indeed be the case: : label T-compiler requires-nightly A-associated-items A-visibility F-inherentassociatedtypes <!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --<!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOTEND --
claim

Related discussion:
text: } // see if we can satisfy using an inherent associated type <del> for impl_ in tcx.inherent_impls(adt_def.did()) { let assoc_ty = tcx.associated_items(impl_).find_by_name_and_kind( tcx, assoc_ident, ty::AssocKind::Type, *impl_, ); if let Some(assoc_ty) = assoc_ty { let ty = tcx.type_of(assoc_ty.def_id); return Ok((ty, DefKind::AssocTy, assoc_ty.def_id)); } </del> <ins> for &impl_ in tcx.inherent_impls(adt_def.did()) { let Some(assoc_ty_did) = self.lookup_assoc_ty(assoc_ident, hir_ref_id, span, impl_) else { continue; }; // FIXME(inherent_associated_types): This does not substitute parameters. let ty = tcx.type_of(assoc_ty_did); return Ok((ty, DefKind::AssocTy, assoc_ty_did)); </ins> } }
Code change:
In the following code, I can successfully refer to the private inherent associated type : I expected to see an error denying the access. If the associated item was a constant, this would indeed be the case: : label T-compiler requires-nightly A-associated-items A-visibility F-inherentassociatedtypes <!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --<!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOTEND --
claim

Related discussion:
text: }; let trait_did = bound.def_id(); <del> let (assoc_ident, def_scope) = tcx.adjust_ident_and_get_scope(assoc_ident, trait_did, hir_ref_id); // We have already adjusted the item name above, so compare with `ident.normalize_to_macros_2_0()` instead // of calling `filter_by_name_and_kind`. let item = tcx.associated_items(trait_did).in_definition_order().find(|i| { i.kind.namespace() == Namespace::TypeNS && i.ident(tcx).normalize_to_macros_2_0() == assoc_ident }); // Assume that if it's not matched, there must be a const defined with the same name // but it was used in a type position. let Some(item) = item else { </del> <ins> let Some(assoc_ty_did) = self.lookup_assoc_ty(assoc_ident, hir_ref_id, span, trait_did) else { // Assume that if it's not matched, there must be a const defined with the same name // but it was used in a type position. </ins> let msg = format!("found associated const `{assoc_ident}` when type was expected"); let guar = tcx.sess.struct_span_err(span, &msg).emit(); return Err(guar); }; <del> let ty = self.projected_ty_from_poly_trait_ref(span, item.def_id, assoc_segment, bound); </del> <ins> let ty = self.projected_ty_from_poly_trait_ref(span, assoc_ty_did, assoc_segment, bound); </ins> let ty = self.normalize_ty(span, ty); <del> let kind = DefKind::AssocTy; if !item.visibility(tcx).is_accessible_from(def_scope, tcx) { let kind = kind.descr(item.def_id); let msg = format!("{} `{}` is private", kind, assoc_ident); tcx.sess .struct_span_err(span, &msg) .span_label(span, &format!("private {}", kind)) .emit(); } tcx.check_stability(item.def_id, Some(hir_ref_id), span, None); </del> if let Some(variant_def_id) = variant_resolution { tcx.struct_span_lint_hir( AMBIGUOUS_ASSOCIATED_ITEMS,
Code change:
In the following code, I can successfully refer to the private inherent associated type : I expected to see an error denying the access. If the associated item was a constant, this would indeed be the case: : label T-compiler requires-nightly A-associated-items A-visibility F-inherentassociatedtypes <!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --<!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOTEND --
claim

Related discussion:
text: }; could_refer_to(DefKind::Variant, variant_def_id, ""); <del> could_refer_to(kind, item.def_id, " also"); </del> <ins> could_refer_to(DefKind::AssocTy, assoc_ty_did, " also"); </ins> lint.span_suggestion( span,
Code change:
In the following code, I can successfully refer to the private inherent associated type : I expected to see an error denying the access. If the associated item was a constant, this would indeed be the case: : label T-compiler requires-nightly A-associated-items A-visibility F-inherentassociatedtypes <!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --<!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOTEND --
claim

Related discussion:
text: }, ); } <del> Ok((ty, kind, item.def_id)) </del> <ins> Ok((ty, DefKind::AssocTy, assoc_ty_did)) } fn lookup_assoc_ty( &self, ident: Ident, block: hir::HirId, span: Span, scope: DefId, ) -> Option<DefId> { let tcx = self.tcx(); let (ident, def_scope) = tcx.adjust_ident_and_get_scope(ident, scope, block); // We have already adjusted the item name above, so compare with `ident.normalize_to_macros_2_0()` instead // of calling `find_by_name_and_kind`. let item = tcx.associated_items(scope).in_definition_order().find(|i| { i.kind.namespace() == Namespace::TypeNS && i.ident(tcx).normalize_to_macros_2_0() == ident })?; let kind = DefKind::AssocTy; if !item.visibility(tcx).is_accessible_from(def_scope, tcx) { let kind = kind.descr(item.def_id); let msg = format!("{kind} `{ident}` is private"); let def_span = self.tcx().def_span(item.def_id); tcx.sess .struct_span_err_with_code(span, &msg, rustc_errors::error_code!(E0624)) .span_label(span, &format!("private {kind}")) .span_label(def_span, &format!("{kind} defined here")) .emit(); } tcx.check_stability(item.def_id, Some(block), span, None); Some(item.def_id) </ins> } fn qpath_to_ty(
Code change:
In the following code, I can successfully refer to the private inherent associated type : I expected to see an error denying the access. If the associated item was a constant, this would indeed be the case: : label T-compiler requires-nightly A-associated-items A-visibility F-inherentassociatedtypes <!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --<!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOTEND --
claim

Related discussion:
text: <ins> #![feature(inherent_associated_types)] #![allow(incomplete_features)] mod m { pub struct T; impl T { type P = (); } } type U = m::T::P; //~ ERROR associated type `P` is private mod n { pub mod n { pub struct T; impl T { pub(super) type P = bool; } } type U = n::T::P; } type V = n::n::T::P; //~ ERROR associated type `P` is private fn main() {} </ins>
Code change:
In the following code, I can successfully refer to the private inherent associated type : I expected to see an error denying the access. If the associated item was a constant, this would indeed be the case: : label T-compiler requires-nightly A-associated-items A-visibility F-inherentassociatedtypes <!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --<!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOTEND --
claim

Related discussion:
text: <ins> error[E0624]: associated type `P` is private --> $DIR/assoc-inherent-private.rs:10:10 | LL |         type P = (); |         ------ associated type defined here ... LL | type U = m::T::P; |          ^^^^^^^ private associated type error[E0624]: associated type `P` is private --> $DIR/assoc-inherent-private.rs:21:10 | LL |             pub(super) type P = bool; |             ----------------- associated type defined here ... LL | type V = n::n::T::P; |          ^^^^^^^^^^ private associated type error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0624`. </ins>
Code change:
In the following code, I can successfully refer to the private inherent associated type : I expected to see an error denying the access. If the associated item was a constant, this would indeed be the case: : label T-compiler requires-nightly A-associated-items A-visibility F-inherentassociatedtypes <!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --<!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOTEND --
claim

Related discussion:
text: <ins> // aux-crate:aux=assoc-inherent-unstable.rs // edition: 2021 type Data = aux::Owner::Data; //~ ERROR use of unstable library feature 'data' fn main() {} </ins>
Code change:
In the following code, I can successfully refer to the private inherent associated type : I expected to see an error denying the access. If the associated item was a constant, this would indeed be the case: : label T-compiler requires-nightly A-associated-items A-visibility F-inherentassociatedtypes <!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --<!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOTEND --
claim

Related discussion:
text: <ins> error[E0658]: use of unstable library feature 'data' --> $DIR/assoc-inherent-unstable.rs:4:13 | LL | type Data = aux::Owner::Data; |             ^^^^^^^^^^^^^^^^ | = help: add `#![feature(data)]` to the crate attributes to enable error: aborting due to previous error For more information about this error, try `rustc --explain E0658`. </ins>
Code change:
In the following code, I can successfully refer to the private inherent associated type : I expected to see an error denying the access. If the associated item was a constant, this would indeed be the case: : label T-compiler requires-nightly A-associated-items A-visibility F-inherentassociatedtypes <!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --<!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOTEND --
claim

Related discussion:
text: <ins> #![feature(staged_api)] #![feature(inherent_associated_types)] #![stable(feature = "main", since = "1.0.0")] #[stable(feature = "main", since = "1.0.0")] pub struct Owner; impl Owner { #[unstable(feature = "data", issue = "none")] pub type Data = (); } </ins>