jiebi/CodeConvo huggingface dataset:
Code change:
Spawned off of I tried this code: I expected to see this happen: I expected the to be mapped to the local paths in the installed component, rather than being left as raw Instead, this happened: is showing up in the output. <!-- 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. --:
see related discussion from wg-debugging triage
in particular, pointed out that that this remapping should be happening if one has the component installed, and that the code doing the remapping should be executed here: and there is corresponding code in bootstrap dist code: There's some useful statements mixed in there, I bet we might be able to figure out what's going on here without too much trickery...
But this is currently a remapping at runtime only when using like in UI tests, right ? Otherwise it's optionally done at compile-time on the dist builders if they set .
is , right? That is what it is mapped from, not what it is mapped to.
Its and 's presence seem to control (at rustc build-time and at runtime respectively) whether the remapping happens in the code you listed above (otherwise would be "empty" and would be a no-op), so I may be missing how this could already remap to the local component according to Felix's comment above ?
I believe these are not being remapped on purpose (based on ). I think currently the remapping only happens for diagnostics (and not things that end up in the binary). There's some more discussion in (and and to some degree). There's also concerns about how it can affect binary size (). also discusses it some.
These paths are also not being remapped even when explicitly requested with

Related discussion:
text: <ins> error[E0507]: cannot move out of `self.thread` which is behind a mutable reference --> $DIR/remap-path-prefix-sysroot.rs:LL:COL | LL |         self.thread.join().unwrap(); |         ^^^^^^^^^^^ ------ `self.thread` moved due to this method call |         | |         move occurs because `self.thread` has type `JoinHandle<()>`, which does not implement the `Copy` trait | note: `JoinHandle::<T>::join` takes ownership of the receiver `self`, which moves `self.thread` --> $SRC_DIR_REAL/std/src/thread/mod.rs:LL:COL | LL |     pub fn join(self) -> Result<T> { |                 ^^^^ error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0507`. </ins>
Code change:
we should suggest cloning. Also, we should suggest <!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --<!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOTEND --
claim
If we suggest add bound, we don't need dervie , This code will compile:

Related discussion:
text: || self.suggest_boxing_when_appropriate(err, expr, expected, expr_ty) || self.suggest_block_to_brackets_peeling_refs(err, expr, expr_ty, expected) || self.suggest_copied_or_cloned(err, expr, expr_ty, expected) <ins> || self.suggest_clone_for_ref(err, expr, expr_ty, expected) </ins> || self.suggest_into(err, expr, expr_ty, expected) || self.suggest_floating_point_literal(err, expr, expected); if !suggested {
Code change:
we should suggest cloning. Also, we should suggest <!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --<!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOTEND --
claim
If we suggest add bound, we don't need dervie , This code will compile:

Related discussion:
text: } } <ins> pub(crate) fn suggest_clone_for_ref( &self, diag: &mut Diagnostic, expr: &hir::Expr<'_>, expr_ty: Ty<'tcx>, expected_ty: Ty<'tcx>, ) -> bool { if let ty::Ref(_, inner_ty, hir::Mutability::Not) = expr_ty.kind() && let Some(clone_trait_def) = self.tcx.lang_items().clone_trait() && expected_ty == *inner_ty && self .infcx .type_implements_trait( clone_trait_def, [self.tcx.erase_regions(expected_ty)], self.param_env ) .must_apply_modulo_regions() { diag.span_suggestion_verbose( expr.span.shrink_to_hi(), "consider using clone here", ".clone()", Applicability::MachineApplicable, ); return true; } false } </ins> pub(crate) fn suggest_copied_or_cloned( &self, diag: &mut Diagnostic,
Code change:
we should suggest cloning. Also, we should suggest <!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --<!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOTEND --
claim
If we suggest add bound, we don't need dervie , This code will compile:

Related discussion:
text: ); } <ins> if self.suggest_add_clone_to_arg(&obligation, &mut err, trait_predicate) { err.emit(); return; } </ins> if self.suggest_impl_trait(&mut err, span, &obligation, trait_predicate) { err.emit(); return;
Code change:
we should suggest cloning. Also, we should suggest <!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --<!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOTEND --
claim
If we suggest add bound, we don't need dervie , This code will compile:

Related discussion:
text: use crate::traits::{NormalizeExt, ObligationCtxt}; use hir::def::CtorOf; <del> use hir::HirId; </del> <ins> use hir::{Expr, HirId}; </ins> use rustc_data_structures::fx::FxHashSet; use rustc_data_structures::stack::ensure_sufficient_stack; use rustc_errors::{
Code change:
we should suggest cloning. Also, we should suggest <!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --<!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOTEND --
claim
If we suggest add bound, we don't need dervie , This code will compile:

Related discussion:
text: trait_pred: ty::PolyTraitPredicate<'tcx>, ); <ins> fn suggest_add_clone_to_arg( &self, obligation: &PredicateObligation<'tcx>, err: &mut Diagnostic, trait_pred: ty::PolyTraitPredicate<'tcx>, ) -> bool; </ins> fn suggest_add_reference_to_arg( &self, obligation: &PredicateObligation<'tcx>,
Code change:
we should suggest cloning. Also, we should suggest <!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --<!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOTEND --
claim
If we suggest add bound, we don't need dervie , This code will compile:

Related discussion:
text: } } <ins> fn suggest_add_clone_to_arg( &self, obligation: &PredicateObligation<'tcx>, err: &mut Diagnostic, trait_pred: ty::PolyTraitPredicate<'tcx>, ) -> bool { let self_ty = self.resolve_vars_if_possible(trait_pred.self_ty()); let ty = self.tcx.erase_late_bound_regions(self_ty); let owner = self.tcx.hir().get_parent_item(obligation.cause.body_id); let Some(generics) = self.tcx.hir().get_generics(owner.def_id) else { return false }; let ty::Ref(_, inner_ty, hir::Mutability::Not) = ty.kind() else { return false }; let ty::Param(param) = inner_ty.kind() else { return false }; let ObligationCauseCode::FunctionArgumentObligation { arg_hir_id, .. } = obligation.cause.code() else { return false }; let arg_node = self.tcx.hir().get(*arg_hir_id); let Node::Expr(Expr { kind: hir::ExprKind::Path(_), ..}) = arg_node else { return false }; let clone_trait = self.tcx.require_lang_item(LangItem::Clone, None); let has_clone = |ty| { self.type_implements_trait(clone_trait, [ty], obligation.param_env) .must_apply_modulo_regions() }; let new_obligation = self.mk_trait_obligation_with_new_self_ty( obligation.param_env, trait_pred.map_bound(|trait_pred| (trait_pred, *inner_ty)), ); if self.predicate_may_hold(&new_obligation) && has_clone(ty) { if !has_clone(param.to_ty(self.tcx)) { suggest_constraining_type_param( self.tcx, generics, err, param.name.as_str(), "Clone", Some(clone_trait), ); } err.span_suggestion_verbose( obligation.cause.span.shrink_to_hi(), "consider using clone here", ".clone()".to_string(), Applicability::MaybeIncorrect, ); return true; } false } </ins> fn suggest_add_reference_to_arg( &self, obligation: &PredicateObligation<'tcx>,
Code change:
we should suggest cloning. Also, we should suggest <!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --<!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOTEND --
claim
If we suggest add bound, we don't need dervie , This code will compile:

Related discussion:
text: <ins> #[derive(Clone)] struct S; // without Clone struct T; fn foo(_: S) {} fn test1() { let s = &S; foo(s); //~ ERROR mismatched types } fn bar(_: T) {} fn test2() { let t = &T; bar(t); //~ ERROR mismatched types } fn main() { test1(); test2(); } </ins>
Code change:
we should suggest cloning. Also, we should suggest <!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --<!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOTEND --
claim
If we suggest add bound, we don't need dervie , This code will compile:

Related discussion:
text: <ins> error[E0308]: mismatched types --> $DIR/issue-106443-sugg-clone-for-arg.rs:11:9 | LL |     foo(s); |     --- ^ expected struct `S`, found `&S` |     | |     arguments to this function are incorrect | note: function defined here --> $DIR/issue-106443-sugg-clone-for-arg.rs:7:4 | LL | fn foo(_: S) {} |    ^^^ ---- help: consider using clone here | LL |     foo(s.clone()); |          ++++++++ error[E0308]: mismatched types --> $DIR/issue-106443-sugg-clone-for-arg.rs:17:9 | LL |     bar(t); |     --- ^ expected struct `T`, found `&T` |     | |     arguments to this function are incorrect | note: function defined here --> $DIR/issue-106443-sugg-clone-for-arg.rs:14:4 | LL | fn bar(_: T) {} |    ^^^ ---- error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0308`. </ins>
Code change:
we should suggest cloning. Also, we should suggest <!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --<!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOTEND --
claim
If we suggest add bound, we don't need dervie , This code will compile:

Related discussion:
text: <ins> #[derive(Clone)] struct S; trait X {} impl X for S {} fn foo<T: X>(_: T) {} fn bar<T: X>(s: &T) { foo(s); //~ ERROR the trait bound `&T: X` is not satisfied } fn bar_with_clone<T: X + Clone>(s: &T) { foo(s); //~ ERROR the trait bound `&T: X` is not satisfied } fn main() { let s = &S; bar(s); } </ins>
Code change:
we should suggest cloning. Also, we should suggest <!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --<!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOTEND --
claim
If we suggest add bound, we don't need dervie , This code will compile:

Related discussion:
text: <ins> error[E0277]: the trait bound `&T: X` is not satisfied --> $DIR/issue-106443-sugg-clone-for-bound.rs:10:9 | LL |     foo(s); |         ^ the trait `X` is not implemented for `&T` | help: consider further restricting this bound | LL | fn bar<T: X + Clone>(s: &T) { |             +++++++ help: consider using clone here | LL |     foo(s.clone()); |          ++++++++ error[E0277]: the trait bound `&T: X` is not satisfied --> $DIR/issue-106443-sugg-clone-for-bound.rs:14:9 | LL |     foo(s); |         ^ the trait `X` is not implemented for `&T` | help: consider using clone here | LL |     foo(s.clone()); |          ++++++++ error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0277`. </ins>
Code change:
There is a latent bug in rustdoc that hangs in when is enabled.
From the thread on :
Interestingly, also gets stuck. I believe that runs the beta (non-parallel) rustdoc. So that'd mean that rustdoc gets stuck when documenting parallel rustc, not that parallel rustdoc gets stuck when documenting rustc.
Both of the PRs that are blocked by this issue are changes that change the ast.
It seems it's not an infinite loop, but just bad (exponential?) time complexity somewhere. suggested trying out what happens when explicitly implementing Send and Sync for the new ast node, and that indeed 'fixes' the problem in So this issue has almost nothing to do with parallel compiler. It occurs in regular non-parallel rustdoc. It's just that with , the ast is Send and Sync, and apparently that takes a huge amount of time to prove when documenting rustcmiddle. (Oli is investigating.)
Data point: Adding the following snippet to will not stop it from compiling successfully, even though documenting the crate will never stop. This makes me think the issue is very much rustdoc related, as it appears to get stuck on proving .
WG-prioritization assigning priority () (note: seems not a regression) label -I-prioritize +P-high
cc
and , https://rust-
[Edit] I'm trying to solve this problem and what I'm currently observing is that the does not store all the information when using rustdoc. This causes rustdoc to recalculate many times when collecting auto trait impl and blanket trait impl. I guess it may be that rustdoc does not calculate the trait implementation on some data structures (such as ) in advance, which resulting in too deep recursion
A revealing phenomenon: The following struct in will cause rustdoc to block while proving that is : But when the generics are instantiated, it will not cause blocking: So I guess it is that causes the values in to not be reused. Because this cache needs inserting (predictions, ).
does this happen even with disabled?
If so, this is probably related to . This is how we determine the paramenv:
I can't reproduce this issue , including my local test Have there been any recent changes?

Related discussion:
text: names: FxHashMap<Symbol, usize>, } <del> // FIXME: Rustdoc has trouble proving Send/Sync for this. See #106930. #[cfg(parallel_compiler)] unsafe impl Sync for FormatArguments {} #[cfg(parallel_compiler)] unsafe impl Send for FormatArguments {} </del> impl FormatArguments { pub fn new() -> Self { Self {
Code change:
There is a latent bug in rustdoc that hangs in when is enabled.
From the thread on :
Interestingly, also gets stuck. I believe that runs the beta (non-parallel) rustdoc. So that'd mean that rustdoc gets stuck when documenting parallel rustc, not that parallel rustdoc gets stuck when documenting rustc.
Both of the PRs that are blocked by this issue are changes that change the ast.
It seems it's not an infinite loop, but just bad (exponential?) time complexity somewhere. suggested trying out what happens when explicitly implementing Send and Sync for the new ast node, and that indeed 'fixes' the problem in So this issue has almost nothing to do with parallel compiler. It occurs in regular non-parallel rustdoc. It's just that with , the ast is Send and Sync, and apparently that takes a huge amount of time to prove when documenting rustcmiddle. (Oli is investigating.)
Data point: Adding the following snippet to will not stop it from compiling successfully, even though documenting the crate will never stop. This makes me think the issue is very much rustdoc related, as it appears to get stuck on proving .
WG-prioritization assigning priority () (note: seems not a regression) label -I-prioritize +P-high
cc
and , https://rust-
[Edit] I'm trying to solve this problem and what I'm currently observing is that the does not store all the information when using rustdoc. This causes rustdoc to recalculate many times when collecting auto trait impl and blanket trait impl. I guess it may be that rustdoc does not calculate the trait implementation on some data structures (such as ) in advance, which resulting in too deep recursion
A revealing phenomenon: The following struct in will cause rustdoc to block while proving that is : But when the generics are instantiated, it will not cause blocking: So I guess it is that causes the values in to not be reused. Because this cache needs inserting (predictions, ).
does this happen even with disabled?
If so, this is probably related to . This is how we determine the paramenv:
I can't reproduce this issue , including my local test Have there been any recent changes?

Related discussion:
text: cx: &mut DocContext<'_>, item_def_id: DefId, ) -> impl Iterator<Item = Item> { <del> // FIXME: To be removed once `parallel_compiler` bugs are fixed! // More information in <https://github.com/rust-lang/rust/pull/106930>. if cfg!(parallel_compiler) { return vec![].into_iter().chain(vec![].into_iter()); } </del> let auto_impls = cx .sess() .prof
Code change:
The bug is in the help section of the "missing lifetime specifier" error (E0106). When the method head is formatted over multiple lines, then green highlighting will be misaligned. I tried this code: I expected to see this happen: For the function it looks like this, which is fine <img width="417" alt="image" src="https://user-"Instead, this happened: But for the function the highlight is misaligned <img width="564" alt="image" src="https://user-"<!-- 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. --: also on stable: <!-- Include a backtrace in the code block by setting in your environment. E.g. . --<details<summaryBacktrace</summary<p</p</details

Related discussion:
text: self.draw_code_line( &mut buffer, &mut row_num, <del> &Vec::new(), </del> <ins> &[], </ins> p + line_start, l, show_code_change,
Code change:
The bug is in the help section of the "missing lifetime specifier" error (E0106). When the method head is formatted over multiple lines, then green highlighting will be misaligned. I tried this code: I expected to see this happen: For the function it looks like this, which is fine <img width="417" alt="image" src="https://user-"Instead, this happened: But for the function the highlight is misaligned <img width="564" alt="image" src="https://user-"<!-- 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. --: also on stable: <!-- Include a backtrace in the code block by setting in your environment. E.g. . --<details<summaryBacktrace</summary<p</p</details

Related discussion:
text: self.draw_code_line( &mut buffer, &mut row_num, <del> highlight_parts, </del> <ins> &highlight_parts, </ins> line_pos + line_start, line, show_code_change,
Code change:
The bug is in the help section of the "missing lifetime specifier" error (E0106). When the method head is formatted over multiple lines, then green highlighting will be misaligned. I tried this code: I expected to see this happen: For the function it looks like this, which is fine <img width="417" alt="image" src="https://user-"Instead, this happened: But for the function the highlight is misaligned <img width="564" alt="image" src="https://user-"<!-- 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. --: also on stable: <!-- Include a backtrace in the code block by setting in your environment. E.g. . --<details<summaryBacktrace</summary<p</p</details

Related discussion:
text: &self, buffer: &mut StyledBuffer, row_num: &mut usize, <del> highlight_parts: &Vec<SubstitutionHighlight>, </del> <ins> highlight_parts: &[SubstitutionHighlight], </ins> line_num: usize, line_to_add: &str, show_code_change: DisplaySuggestion,
Code change:
The bug is in the help section of the "missing lifetime specifier" error (E0106). When the method head is formatted over multiple lines, then green highlighting will be misaligned. I tried this code: I expected to see this happen: For the function it looks like this, which is fine <img width="417" alt="image" src="https://user-"Instead, this happened: But for the function the highlight is misaligned <img width="564" alt="image" src="https://user-"<!-- 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. --: also on stable: <!-- Include a backtrace in the code block by setting in your environment. E.g. . --<details<summaryBacktrace</summary<p</p</details

Related discussion:
text: }); buf.push_str(&part.snippet); let cur_hi = sm.lookup_char_pos(part.span.hi()); <del> if prev_hi.line == cur_lo.line && cur_hi.line == cur_lo.line { </del> <ins> if cur_hi.line == cur_lo.line { </ins> // Account for the difference between the width of the current code and the // snippet being suggested, so that the *later* suggestions are correctly // aligned on the screen.
Code change:
The bug is in the help section of the "missing lifetime specifier" error (E0106). When the method head is formatted over multiple lines, then green highlighting will be misaligned. I tried this code: I expected to see this happen: For the function it looks like this, which is fine <img width="417" alt="image" src="https://user-"Instead, this happened: But for the function the highlight is misaligned <img width="564" alt="image" src="https://user-"<!-- 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. --: also on stable: <!-- Include a backtrace in the code block by setting in your environment. E.g. . --<details<summaryBacktrace</summary<p</p</details

Related discussion:
text: <ins> // compile-flags: --error-format=human --color=always // ignore-windows fn short(foo_bar: &Vec<&i32>) -> &i32 { //~ ERROR missing lifetime specifier &12 } fn long( //~ ERROR missing lifetime specifier foo_bar: &Vec<&i32>, something_very_long_so_that_the_line_will_wrap_around__________: i32, ) -> &i32 { &12 } fn long2( //~ ERROR missing lifetime specifier foo_bar: &Vec<&i32>) -> &i32 { &12 } fn main() {} </ins>
Code change:
When running with the above code, the docs list the following items: <details<summaryDocs</summary </detailsI would expect to be listed as a reexport, not a struct. The way it is now, it looks like and are different types, which is not the case. If is made , everything looks as it's supposed to. label +T-rustdoc
It's the intended behaviour. Since the module is private, is inlining the item into .
Yes, but is public, so should it really be inlined a second time?
Ok sorry I misunderstood what you meant. No, it shouldn't be inlined a second time.

Related discussion:
text: add_without_unwanted_attributes(attributes, hir_map.attrs(item.hir_id()), is_inline); } <del> let def_id = if let [.., parent_segment, _] = &path.segments { match parent_segment.res { hir::def::Res::Def(_, def_id) => def_id, _ if parent_segment.ident.name == kw::Crate => { // In case the "parent" is the crate, it'll give `Res::Err` so we need to // circumvent it this way. tcx.parent(item.owner_id.def_id.to_def_id()) } _ => break, } } else { // If the path doesn't have a parent, then the parent is the current module. tcx.parent(item.owner_id.def_id.to_def_id()) }; let Some(parent) = hir_map.get_if_local(def_id) else { break }; // We get the `Ident` we will be looking for into `item`. let looking_for = path.segments[path.segments.len() - 1].ident; visitor.reset(looking_for); match parent { hir::Node::Item(parent_item) => { hir::intravisit::walk_item(&mut visitor, parent_item); } hir::Node::Crate(m) => { hir::intravisit::walk_mod( &mut visitor, m, tcx.local_def_id_to_hir_id(def_id.as_local().unwrap()), ); } _ => break, } if let Some(i) = visitor.item { </del> <ins> if let Some(i) = visitor.find_target(tcx, item.owner_id.def_id.to_def_id(), path) { </ins> item = i; } else { break;
Code change:
When running with the above code, the docs list the following items: <details<summaryDocs</summary </detailsI would expect to be listed as a reexport, not a struct. The way it is now, it looks like and are different types, which is not the case. If is made , everything looks as it's supposed to. label +T-rustdoc
It's the intended behaviour. Since the module is private, is inlining the item into .
Yes, but is public, so should it really be inlined a second time?
Ok sorry I misunderstood what you meant. No, it shouldn't be inlined a second time.

Related discussion:
text: use std::mem; <del> use crate::clean::{cfg::Cfg, AttributesExt, NestedAttributesExt}; </del> <ins> use crate::clean::{cfg::Cfg, AttributesExt, NestedAttributesExt, OneLevelVisitor}; </ins> use crate::core; /// This module is used to store stuff from Rust's AST in a more convenient