jiebi/CodeConvo huggingface dataset:
Code change:
I would expect the following code to compile successfully since we explicitly opt out of implementing : However, the code fails to compile with the following error message: label C-bug A-lint F-negativeimpls <!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --<!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOT_END --
The compiler only checks if the type implements already to return early and not emit the lint diagnostic but it doesn't check if the type implements :
I think this makes the trick, you are right! the last think is to explore what is the code of the method The code of the method looks not so trivial :) If you did not find already I can play with your on it by mentoring you, I had some experience in "git archeology" :) label +E-mentor
claim

Related discussion:
text: use rustc_middle::ty::layout::{LayoutError, LayoutOf}; use rustc_middle::ty::print::with_no_trimmed_paths; use rustc_middle::ty::GenericArgKind; <ins> use rustc_middle::ty::ToPredicate; </ins> use rustc_middle::ty::TypeVisitableExt; use rustc_middle::ty::{self, Instance, Ty, TyCtxt, VariantDef}; use rustc_session::config::ExpectedValues;
Code change:
I would expect the following code to compile successfully since we explicitly opt out of implementing : However, the code fails to compile with the following error message: label C-bug A-lint F-negativeimpls <!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --<!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOT_END --
The compiler only checks if the type implements already to return early and not emit the lint diagnostic but it doesn't check if the type implements :
I think this makes the trick, you are right! the last think is to explore what is the code of the method The code of the method looks not so trivial :) If you did not find already I can play with your on it by mentoring you, I had some experience in "git archeology" :) label +E-mentor
claim

Related discussion:
text: use rustc_span::{BytePos, InnerSpan, Span}; use rustc_target::abi::{Abi, FIRST_VARIANT}; use rustc_trait_selection::infer::{InferCtxtExt, TyCtxtInferExt}; <ins> use rustc_trait_selection::traits::query::evaluate_obligation::InferCtxtExt as _; </ins> use rustc_trait_selection::traits::{self, misc::type_allowed_to_implement_copy}; use crate::nonstandard_style::{method_context, MethodLateContext};
Code change:
I would expect the following code to compile successfully since we explicitly opt out of implementing : However, the code fails to compile with the following error message: label C-bug A-lint F-negativeimpls <!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --<!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOT_END --
The compiler only checks if the type implements already to return early and not emit the lint diagnostic but it doesn't check if the type implements :
I think this makes the trick, you are right! the last think is to explore what is the code of the method The code of the method looks not so trivial :) If you did not find already I can play with your on it by mentoring you, I had some experience in "git archeology" :) label +E-mentor
claim

Related discussion:
text: if ty.is_copy_modulo_regions(cx.tcx, param_env) { return; } <ins> if type_implements_negative_copy_modulo_regions(cx.tcx, ty, param_env) { return; } </ins> // We shouldn't recommend implementing `Copy` on stateful things, // such as iterators.
Code change:
I would expect the following code to compile successfully since we explicitly opt out of implementing : However, the code fails to compile with the following error message: label C-bug A-lint F-negativeimpls <!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --<!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOT_END --
The compiler only checks if the type implements already to return early and not emit the lint diagnostic but it doesn't check if the type implements :
I think this makes the trick, you are right! the last think is to explore what is the code of the method The code of the method looks not so trivial :) If you did not find already I can play with your on it by mentoring you, I had some experience in "git archeology" :) label +E-mentor
claim

Related discussion:
text: } } <ins> /// Check whether a `ty` has a negative `Copy` implementation, ignoring outlives constraints. fn type_implements_negative_copy_modulo_regions<'tcx>( tcx: TyCtxt<'tcx>, ty: Ty<'tcx>, param_env: ty::ParamEnv<'tcx>, ) -> bool { let trait_ref = ty::TraitRef::new(tcx, tcx.require_lang_item(hir::LangItem::Copy, None), [ty]); let pred = ty::TraitPredicate { trait_ref, polarity: ty::ImplPolarity::Negative }; let obligation = traits::Obligation { cause: traits::ObligationCause::dummy(), param_env, recursion_depth: 0, predicate: ty::Binder::dummy(pred).to_predicate(tcx), }; tcx.infer_ctxt().build().predicate_must_hold_modulo_regions(&obligation) } </ins> declare_lint! { /// The `missing_debug_implementations` lint detects missing /// implementations of [`fmt::Debug`] for public types.
Code change:
I would expect the following code to compile successfully since we explicitly opt out of implementing : However, the code fails to compile with the following error message: label C-bug A-lint F-negativeimpls <!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --<!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOT_END --
The compiler only checks if the type implements already to return early and not emit the lint diagnostic but it doesn't check if the type implements :
I think this makes the trick, you are right! the last think is to explore what is the code of the method The code of the method looks not so trivial :) If you did not find already I can play with your on it by mentoring you, I had some experience in "git archeology" :) label +E-mentor
claim

Related discussion:
text: <ins> // Regression test for issue #101980. // Ensure that we don't suggest impl'ing `Copy` for a type if it already impl's `!Copy`. // check-pass #![feature(negative_impls)] #![deny(missing_copy_implementations)] pub struct Struct { pub field: i32, } impl !Copy for Struct {} fn main() {} </ins>
Code change:
Example: yields <details<summaryBacktrace</summary</details
cc and
This has to do with late-bound regions and RPITITs. I have a fix, but it's probably not right nor is it cleaned up much. I'll put it up for scrutiny soon though.
Actually nvm, it was a silly little resolver bug.
label +I-ICE +C-bug

Related discussion:
text: sig.decl.has_self(), sig.decl.inputs.iter().map(|Param { ty, .. }| (None, &**ty)), &sig.decl.output, <del> ) </del> <ins> ); this.record_lifetime_params_for_async( fn_id, sig.header.asyncness.opt_return_id(), ); </ins> }, ); return;
Code change:
Example: yields <details<summaryBacktrace</summary</details
cc and
This has to do with late-bound regions and RPITITs. I have a fix, but it's probably not right nor is it cleaned up much. I'll put it up for scrutiny soon though.
Actually nvm, it was a silly little resolver bug.
label +I-ICE +C-bug

Related discussion:
text: }, ); <del> // Construct the list of in-scope lifetime parameters for async lowering. // We include all lifetime parameters, either named or "Fresh". // The order of those parameters does not matter, as long as it is // deterministic. if let Some((async_node_id, _)) = async_node_id { let mut extra_lifetime_params = this .r .extra_lifetime_params_map .get(&fn_id) .cloned() .unwrap_or_default(); for rib in this.lifetime_ribs.iter().rev() { extra_lifetime_params.extend( rib.bindings .iter() .map(|(&ident, &(node_id, res))| (ident, node_id, res)), ); match rib.kind { LifetimeRibKind::Item => break, LifetimeRibKind::AnonymousCreateParameter { binder, .. } => { if let Some(earlier_fresh) = this.r.extra_lifetime_params_map.get(&binder) { extra_lifetime_params.extend(earlier_fresh); } } _ => {} } } this.r .extra_lifetime_params_map .insert(async_node_id, extra_lifetime_params); } </del> <ins> this.record_lifetime_params_for_async(fn_id, async_node_id); </ins> if let Some(body) = body { // Ignore errors in function bodies if this is rustdoc
Code change:
Example: yields <details<summaryBacktrace</summary</details
cc and
This has to do with late-bound regions and RPITITs. I have a fix, but it's probably not right nor is it cleaned up much. I'll put it up for scrutiny soon though.
Actually nvm, it was a silly little resolver bug.
label +I-ICE +C-bug

Related discussion:
text: Some((ident.name, ns)), ) } <ins> /// Construct the list of in-scope lifetime parameters for async lowering. /// We include all lifetime parameters, either named or "Fresh". /// The order of those parameters does not matter, as long as it is /// deterministic. fn record_lifetime_params_for_async( &mut self, fn_id: NodeId, async_node_id: Option<(NodeId, Span)>, ) { if let Some((async_node_id, _)) = async_node_id { let mut extra_lifetime_params = self.r.extra_lifetime_params_map.get(&fn_id).cloned().unwrap_or_default(); for rib in self.lifetime_ribs.iter().rev() { extra_lifetime_params.extend( rib.bindings.iter().map(|(&ident, &(node_id, res))| (ident, node_id, res)), ); match rib.kind { LifetimeRibKind::Item => break, LifetimeRibKind::AnonymousCreateParameter { binder, .. } => { if let Some(earlier_fresh) = self.r.extra_lifetime_params_map.get(&binder) { extra_lifetime_params.extend(earlier_fresh); } } _ => {} } } self.r.extra_lifetime_params_map.insert(async_node_id, extra_lifetime_params); } } </ins> } struct LifetimeCountVisitor<'a, 'b> {
Code change:
Example: yields <details<summaryBacktrace</summary</details
cc and
This has to do with late-bound regions and RPITITs. I have a fix, but it's probably not right nor is it cleaned up much. I'll put it up for scrutiny soon though.
Actually nvm, it was a silly little resolver bug.
label +I-ICE +C-bug

Related discussion:
text: <ins> // check-pass // edition:2021 #![feature(async_fn_in_trait)] #![allow(incomplete_features)] use std::future::Future; async fn yield_now() {} trait AsyncIterator { type Item; async fn next(&mut self) -> Option<Self::Item>; } struct YieldingRange { counter: u32, stop: u32, } impl AsyncIterator for YieldingRange { type Item = u32; async fn next(&mut self) -> Option<Self::Item> { if self.counter == self.stop { None } else { let c = self.counter; self.counter += 1; yield_now().await; Some(c) } } } async fn async_main() { let mut x = YieldingRange { counter: 0, stop: 10 }; while let Some(v) = x.next().await { println!("Hi: {v}"); } } fn main() { let _ = async_main(); } </ins>
Code change:
Example: yields <details<summaryBacktrace</summary</details
cc and
This has to do with late-bound regions and RPITITs. I have a fix, but it's probably not right nor is it cleaned up much. I'll put it up for scrutiny soon though.
Actually nvm, it was a silly little resolver bug.
label +I-ICE +C-bug

Related discussion:
text: <ins> // check-pass // This is currently stable behavior, which was almost accidentally made an // error in #102161 since there is no test exercising it. I am not sure if // this _should_ be the desired behavior, but at least we should know if it // changes. fn main() {} trait Foo { fn fn_with_type_named_same_as_local_in_param(b: i32, b: i32); } </ins>
Code change:
<!-- Thank you for finding an Internal Compiler Error! If possible, try to provide a minimal verifiable example. You can read "Rust Bug Minimization Patterns" for how to create smaller examples. --found via fuzzing <!-- 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. --: <!-- Include a backtrace in the code block by setting in your environment. E.g. . --<details<summary<strongBacktrace</strong</summary<p</p</details
It seems that the ICE does not need and no_core feature. A little bit smaller example is:

Related discussion:
text: ObligationCauseCode::BinOp { rhs_span: Some(span), is_lit, .. } if *is_lit => span, _ => return, }; <del> match ( trait_ref.skip_binder().self_ty().kind(), trait_ref.skip_binder().substs.type_at(1).kind(), ) { (ty::Float(_), ty::Infer(InferTy::IntVar(_))) => { err.span_suggestion_verbose( rhs_span.shrink_to_hi(), "consider using a floating-point literal by writing it with `.0`", ".0", Applicability::MaybeIncorrect, ); } _ => {} </del> <ins> if let ty::Float(_) = trait_ref.skip_binder().self_ty().kind() && let ty::Infer(InferTy::IntVar(_)) = trait_ref.skip_binder().substs.type_at(1).kind() { err.span_suggestion_verbose( rhs_span.shrink_to_hi(), "consider using a floating-point literal by writing it with `.0`", ".0", Applicability::MaybeIncorrect, ); </ins> } }
Code change:
<!-- Thank you for finding an Internal Compiler Error! If possible, try to provide a minimal verifiable example. You can read "Rust Bug Minimization Patterns" for how to create smaller examples. --found via fuzzing <!-- 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. --: <!-- Include a backtrace in the code block by setting in your environment. E.g. . --<details<summary<strongBacktrace</strong</summary<p</p</details
It seems that the ICE does not need and no_core feature. A little bit smaller example is:

Related discussion:
text: <ins> // normalize-stderr-test "loaded from .*libcore-.*.rlib" -> "loaded from SYSROOT/libcore-*.rlib" #![feature(lang_items)] #[lang="sized"] trait Sized { } //~ ERROR found duplicate lang item `sized` fn ref_Struct(self: &Struct, f: &u32) -> &u32 { //~^ ERROR `self` parameter is only allowed in associated functions //~| ERROR cannot find type `Struct` in this scope //~| ERROR mismatched types let x = x << 1; //~^ ERROR the size for values of type `{integer}` cannot be known at compilation time //~| ERROR cannot find value `x` in this scope } fn main() {} </ins>
Code change:
<!-- Thank you for finding an Internal Compiler Error! If possible, try to provide a minimal verifiable example. You can read "Rust Bug Minimization Patterns" for how to create smaller examples. --found via fuzzing <!-- 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. --: <!-- Include a backtrace in the code block by setting in your environment. E.g. . --<details<summary<strongBacktrace</strong</summary<p</p</details
It seems that the ICE does not need and no_core feature. A little bit smaller example is:

Related discussion:
text: <ins> error: `self` parameter is only allowed in associated functions --> $DIR/issue-102989.rs:7:15 | LL | fn ref_Struct(self: &Struct, f: &u32) -> &u32 { |               ^^^^ not semantically valid as function parameter | = note: associated functions are those in `impl` or `trait` definitions error[E0412]: cannot find type `Struct` in this scope --> $DIR/issue-102989.rs:7:22 | LL | fn ref_Struct(self: &Struct, f: &u32) -> &u32 { |                      ^^^^^^ not found in this scope error[E0425]: cannot find value `x` in this scope --> $DIR/issue-102989.rs:11:13 | LL |     let x = x << 1; |             ^ help: a local variable with a similar name exists: `f` error[E0152]: found duplicate lang item `sized` --> $DIR/issue-102989.rs:5:1 | LL | trait Sized { } | ^^^^^^^^^^^ | = note: the lang item is first defined in crate `core` (which `std` depends on) = note: first definition in `core` loaded from SYSROOT/libcore-*.rlib = note: second definition in the local crate (`issue_102989`) error[E0277]: the size for values of type `{integer}` cannot be known at compilation time --> $DIR/issue-102989.rs:11:15 | LL |     let x = x << 1; |               ^^ doesn't have a size known at compile-time | = help: the trait `std::marker::Sized` is not implemented for `{integer}` error[E0308]: mismatched types --> $DIR/issue-102989.rs:7:42 | LL | fn ref_Struct(self: &Struct, f: &u32) -> &u32 { |    ----------                            ^^^^ expected `&u32`, found `()` |    | |    implicitly returns `()` as its body has no tail or `return` expression | note: consider returning one of these bindings --> $DIR/issue-102989.rs:7:30 | LL | fn ref_Struct(self: &Struct, f: &u32) -> &u32 { |                              ^ ... LL |     let x = x << 1; |         ^ error: aborting due to 6 previous errors Some errors have detailed explanations: E0152, E0277, E0308, E0412, E0425. For more information about an error, try `rustc --explain E0152`. </ins>
Code change:
I tried this code: I expected to see this happen: I expected to see two diagnostic messages, telling me about the distinct parse errors on lines 1 and 2. Instead, this happened: The first error was treated as non-recoverable, yielding this output (): I'm assuming recovering in the face of this parse error would be a relatively simple task, given that there is already the present that should be a strong hint that someone meant to type . So I'm tagging this with labels indicating that its a good opportunity for someone who wants to acquaint themselves with the code base. <!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --<!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOTEND --
(This needs a mentor. I am thinking that if someone doesn't pick it up by Friday, then I will see about using it as the basis for one or more instructional videos.)
I can mentor whoever wants to work on this. See for the general area where changes need to be made, and ping me if someone needs help on Zulip.
May I work on this?
You can , and I recommend checking out the to find out what the contribution process looks like.
i would like to work on this with your help.
claim
release-assignment
This is mostly about adding checks around such that it recovers when encountering . However, we would also need the ability to recover to be configurable as arguments to , as we would want to recover from as well. PS: don't take this as is.. I am not that familiar with ast and recovery, but I think this is the main idea
I will take a quick look into this. claim

Related discussion:
text: if self.eat(&token::ModSep) { self.parse_use_tree_glob_or_nested()? } else { <ins> // Recover from using a colon as path separator. while self.eat_noexpect(&token::Colon) { self.struct_span_err(self.prev_token.span, "expected `::`, found `:`") .span_suggestion_short( self.prev_token.span, "use double colon", "::", Applicability::MachineApplicable, ) .note_once("import paths are delimited using `::`") .emit(); // We parse the rest of the path and append it to the original prefix. self.parse_path_segments(&mut prefix.segments, PathStyle::Mod, None)?; prefix.span = lo.to(self.prev_token.span); } </ins> UseTreeKind::Simple(self.parse_rename()?, DUMMY_NODE_ID, DUMMY_NODE_ID) } };
Code change:
I tried this code: I expected to see this happen: I expected to see two diagnostic messages, telling me about the distinct parse errors on lines 1 and 2. Instead, this happened: The first error was treated as non-recoverable, yielding this output (): I'm assuming recovering in the face of this parse error would be a relatively simple task, given that there is already the present that should be a strong hint that someone meant to type . So I'm tagging this with labels indicating that its a good opportunity for someone who wants to acquaint themselves with the code base. <!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --<!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOTEND --
(This needs a mentor. I am thinking that if someone doesn't pick it up by Friday, then I will see about using it as the basis for one or more instructional videos.)
I can mentor whoever wants to work on this. See for the general area where changes need to be made, and ping me if someone needs help on Zulip.
May I work on this?
You can , and I recommend checking out the to find out what the contribution process looks like.
i would like to work on this with your help.
claim
release-assignment
This is mostly about adding checks around such that it recovers when encountering . However, we would also need the ability to recover to be configurable as arguments to , as we would want to recover from as well. PS: don't take this as is.. I am not that familiar with ast and recovery, but I think this is the main idea
I will take a quick look into this. claim

Related discussion:
text: <ins> // Recover from using a colon as a path separator. use std::process:Command; //~^ ERROR expected `::`, found `:` use std:fs::File; //~^ ERROR expected `::`, found `:` use std:collections:HashMap; //~^ ERROR expected `::`, found `:` //~| ERROR expected `::`, found `:` fn main() { } </ins>
Code change:
I tried this code: I expected to see this happen: I expected to see two diagnostic messages, telling me about the distinct parse errors on lines 1 and 2. Instead, this happened: The first error was treated as non-recoverable, yielding this output (): I'm assuming recovering in the face of this parse error would be a relatively simple task, given that there is already the present that should be a strong hint that someone meant to type . So I'm tagging this with labels indicating that its a good opportunity for someone who wants to acquaint themselves with the code base. <!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --<!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOTEND --
(This needs a mentor. I am thinking that if someone doesn't pick it up by Friday, then I will see about using it as the basis for one or more instructional videos.)
I can mentor whoever wants to work on this. See for the general area where changes need to be made, and ping me if someone needs help on Zulip.
May I work on this?
You can , and I recommend checking out the to find out what the contribution process looks like.
i would like to work on this with your help.
claim
release-assignment
This is mostly about adding checks around such that it recovers when encountering . However, we would also need the ability to recover to be configurable as arguments to , as we would want to recover from as well. PS: don't take this as is.. I am not that familiar with ast and recovery, but I think this is the main idea
I will take a quick look into this. claim

Related discussion:
text: <ins> error: expected `::`, found `:` --> $DIR/use-colon-as-mod-sep.rs:3:17 | LL | use std::process:Command; |                 ^ help: use double colon | = note: import paths are delimited using `::` error: expected `::`, found `:` --> $DIR/use-colon-as-mod-sep.rs:5:8 | LL | use std:fs::File; |        ^ help: use double colon error: expected `::`, found `:` --> $DIR/use-colon-as-mod-sep.rs:7:8 | LL | use std:collections:HashMap; |        ^ help: use double colon error: expected `::`, found `:` --> $DIR/use-colon-as-mod-sep.rs:7:20 | LL | use std:collections:HashMap; |                    ^ help: use double colon error: aborting due to 4 previous errors </ins>
Code change:
Latest mingw has broken headers () therefore missing definitions locally. This causes error on mingw-w64 since its header is not broken. :( cc
Quick fix is adding at . mingw-w64 doesn't define them, defines instead. I think we should prepare a plan when mingw also fixes it. (They already fixed third one of on w32api-4.0.3.) However, seems like mingw doesn't increment : both 4.0.0-1 and 4.0.3 have value .
mingw-w64 gets its' own section in , doesn't it? So adding mingw-fix-include to include path in can be conditioned on some macro defined there. As for mingw fixing their headers, I think we can just remove fixed headers from mingw-fix-include when that happens.
I'm building rust on mingw-w64-32bit but rust thinks it is on mingw. I'm not sure this is "legal", but I don't want to cross-build from mingw to mingw-w64-32bit since their difference is small.
has three mingw entries: i686-pc-mingw32 (normal mingw), i586-mingw32msvc (anyone who know this?), and x86_64-w64-mingw32 (mingw-w64 64bit). We don't have i686-w64-mingw32 (mingw-w64 32-bit). I don't know if it is good idea of adding it, so quick fix seems sufficient for now.

Related discussion:
text: #include_next <winsock2.h> <ins> // mingw 4.0.x has broken headers (#9246) but mingw-w64 does not. #if defined(__MINGW_MAJOR_VERSION) && __MINGW_MAJOR_VERSION == 4 </ins> typedef struct pollfd { SOCKET fd; short  events;