jiebi/CodeConvo huggingface dataset:
Code change:
<ins> // Copyright 2015 The Rust Project Developers. See the COPYRIGHT // file at the top-level directory of this distribution and at // http://rust-lang.org/COPYRIGHT. // // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your // option. This file may not be copied, modified, or distributed // except according to those terms. macro_rules! items { () => { type A = (); fn a() {} } } trait Foo { type A; fn a(); } impl Foo for () { items!(); } fn main() { } </ins>

Related discussion:
text: RegionScope::anonregions::h0a5ed4a2d46d3aeeqlu 12: 0x6d5978bd - astconv::asttytoty::h1dadfccc9ddb5e90VHv 13: 0x6d5ef523 - rscope::ShiftedRscope<'r.RegionScope::anonregions::h0a5ed4a2d46d3aeeqlu 14: 0x6d5fa734 - rscope::ShiftedRscope<'r.RegionScope::anonregions::h0a5ed4a2d46d3aeeqlu 15: 0x6d61330f - collect::CollectCtxt<'a, 'tcx.AstConv<'tcx::tcx::hf449f596d422460aAFw 16: 0x6d60a79a - collect::CollectCtxt<'a, 'tcx.
Code change:
<ins> // Copyright 2015 The Rust Project Developers. See the COPYRIGHT // file at the top-level directory of this distribution and at // http://rust-lang.org/COPYRIGHT. // // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your // option. This file may not be copied, modified, or distributed // except according to those terms. macro_rules! items { () => { type A = (); fn a() {} } } trait Foo { type A; fn a(); } impl Foo for () { items!(); } fn main() { } </ins>

Related discussion:
text: AstConv<'tcx::getitemtypescheme::he174d5be00f2627cMFw 17: 0x6d643867 - checkcrate::h72731a5b4298723fkrB 18: 0x6d64131c - checkcrate::h72731a5b4298723fkrB 19: 0x70b1eb58 - driver::phase3runanalysispasses::hc863f28a1bd50b11SGa 20: 0x70b02618 - driver::compileinput::hd580d8c011d24ba3Eba 21: 0x70bcfc4c - runcompiler::hb48a33a057cced0e5bc 22: 0x70bcd85b - run::h3df2025cf41d43b3Ibc 23: 0x70bcc56a - run::h3df2025cf41d43b3Ibc 24: 0x69c4180c - rusttry 25: 0x69c417e9 - rusttry 26: 0x70bccbdc - run::h3df2025cf41d43b3Ibc 27: 0x69c03ae2 - sys::tcp::TcpListener::bind::h2319ec78a0f49dc2faF 28: 0x770f59ed - BaseThreadInitThunk
Same error as .
Code change:
<ins> // Copyright 2015 The Rust Project Developers. See the COPYRIGHT // file at the top-level directory of this distribution and at // http://rust-lang.org/COPYRIGHT. // // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your // option. This file may not be copied, modified, or distributed // except according to those terms. macro_rules! items { () => { type A = (); fn a() {} } } trait Foo { type A; fn a(); } impl Foo for () { items!(); } fn main() { } </ins>

Related discussion:
text: I got this while trying to implement something similar to a FromStr trait and tried to rely on a lot of inferencing when calling it. I can try to extract a standalone example if needed.
This ICE is also producible by trying to refer to an associated type that's never defined. is accepted by the compiler when it clearly should not be - what on earth is ? The following and code cases the same ICE. Here's the stack trace:
Code change:
<ins> // Copyright 2015 The Rust Project Developers. See the COPYRIGHT // file at the top-level directory of this distribution and at // http://rust-lang.org/COPYRIGHT. // // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your // option. This file may not be copied, modified, or distributed // except according to those terms. macro_rules! items { () => { type A = (); fn a() {} } } trait Foo { type A; fn a(); } impl Foo for () { items!(); } fn main() { } </ins>

Related discussion:
text: I get the ICE below when I compile this fragment of code: The above structs are defined here: The above fragment is part of That crate depends on And that crate requires erlang-17.4 to be installed.
A minimal program to demonstrate the crash is...
Code change:
<ins> // Copyright 2015 The Rust Project Developers. See the COPYRIGHT // file at the top-level directory of this distribution and at // http://rust-lang.org/COPYRIGHT. // // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your // option. This file may not be copied, modified, or distributed // except according to those terms. macro_rules! items { () => { type A = (); fn a() {} } } trait Foo { type A; fn a(); } impl Foo for () { items!(); } fn main() { } </ins>

Related discussion:
text: compile with opt-level = 2 (works fine with opt-level=0)
strange. the program looks legit to me.
this works for me now, as of
This prints on all opt levels for me at .
Code change:
<ins> struct Foo(i32); fn main() { let Foo(...) = Foo(0); //~ ERROR unexpected `...` let [_, ..., _] = [0, 1]; //~ ERROR unexpected `...` let _recovery_witness: () = 0; //~ ERROR mismatched types } </ins>

Related discussion:
text: ` The problem here is that we have instead of The compiler however points towards in the error message instead of the superfluous : Fun fact: when using four dots , it correctly points at the last dot :) <!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --This issue has been assigned to via . <!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOTEND --
seems like a simple issue to fix. If I were to take a shot at fixing this, where would I start?
Mentoring instructions: Add a branch after this one... instead of , check that . This should be interpreted as a as in the previous branch, but an error should also be emitted. (Add the code for error emission in a separate method, with an appropriate , where the span of the is replaced with . See for an example on emitting an error with a suggestion.)
Sure thing! Will get to it right after work. Thanks for the pointers.
assign
Code change:
<ins> mod list { pub use self::List::Cons; pub enum List<T> { Cons(T, Box<List<T>>), } } mod alias { use crate::list::List; pub type Foo = List<String>; } fn foo(l: crate::alias::Foo) { match l { Cons(..) => {} //~ ERROR: cannot find tuple struct or tuple variant `Cons` in this scope } } fn main() {} </ins>

Related discussion:
text: Bisected to a rollup, but I think it's very likely to be . cc searched nightlies: from nightly-2021-10-01 to nightly-2021-10-19 regressed nightly: nightly-2021-10-02 searched commits: from to regressed commit: <details<summarybisected with <a href=''cargo-bisect-rustc</av0.6.0</summaryHost triple: x86_64-apple-darwin Reproduce with: </details
The old suggestion was actually incorrect because it suggested , which is a private import. However, the new error is "more incorrect" IMO since it says something confusing (and incorrect).
Assigning priority as discussed in the of the Prioritization Working Group. label -I-prioritize +P-medium
Code change:
<ins> Couldn't create directory for doctest executables: Permission denied (os error 13) </ins>

Related discussion:
text: When setting the directory to persist doctests to if an UNC path is used on windows there's a segfault. The offending setting of persist-doctests: . cargo-tarpaulin sets this programatically using a path it gets for the target directory from cargo-metadata. The path from cargo-metadata is an UNC path and this then causes a segfault. I'm going to detect UNC paths in my code and remove the on windows, but I felt this warrants a bug report as someone else will hit it eventually. Also, I'm not sure if other parts of the compiler fall prey to this issue? Compiler version is: the latest nightly (1.64.0-nightly 2022-06-28) The stack trace: <!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --<!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOT_END --
This panic is also triggered in Linux if e.g. trying to write into a directory that the user has no permission to write. I PR'd fix to change the unwrap to more orderly panic and relaying the underlying error detail via eprintln! ~/gg/rust/build/x86_64-unknown-linux-gnu/stage2/bin/rustdoc --test -Z unstable-options --persist-doctests /tmp/foobar Couldn't create directory for doctest executables: Permission denied (os error 13) instead of:
The lack of ICE is definitely nicer, but this still won't handle UNC paths on windows will it? Which is the main issue I personally have with the code
That's a problem for std::fs::createdirall(&path) me thinks has to be fixed there
Makes sense looking at the code, should I raise another issue for the libs team?
Actually, yes it would be great to raise another issue targeting std::fs::createdirall - as it is wider issue. you are right. Thanks!
So isn't this an issue with the tool generating an incorrect argument?
So the paths are weirding me out (I normally only use linux), because they seem to sometimes print differently given different display methods. It shows up as printing the path in my rust code before making the env var, and if I print the rustdocflags I'm setting it's correct.
Code change:
<ins> Couldn't create directory for doctest executables: Permission denied (os error 13) </ins>

Related discussion:
text: But if I do it returns false, I have to do for it to return true. I'll raise the other issue and after work look into it more properly try to make a better MRE for windows
do you mind changing title s/UNC/invalid/ to address the panic on this issue, thanks! :)
also please remove s/on windows// thanks a lot :+1:
Done, and I realised what was wrong with the path, it's correct in the code, it's just when it got set into the environment variable it seems it needed the first slash to be escaped and that caused the invalid path (so no issues in std::fs need fixing)
claim label +I-ICE +T-RUSTDOC
Code change:
fn main() { let x = box 3; //~^ ERROR box expression syntax is experimental; you can call `Box::new` instead. <del> //~| HELP add #![feature(box_syntax)] to the crate attributes to enable </del> }

Related discussion:
text: Steps to reproduce: The output of is: does as suggested by the message, but that fails too (as expected): Proposed fix: in the beta and stable channels (i.e. whenever is forbidden), the message that suggests adding should not be shown. (Clean up the test case with .) CC
Gonna milestone this real quick, as it seems quite important.
I might be able to whip up a quick fix, though I'm not 100% sure about testing it properly ... (I've never actually tried building something for a non-dev release channel before...)
after chatting with it seems like I have a patch, building it now
gonna leave to it
Hello good Rust folks :smile: Before the beta, I used which is in . Is there any way to use this trait during the beta ? I'm not sure how I can get the code to compile. Thanks for any tip / hints you can offer :+1:
Hi Commenting on random unrelated issues is usually not the right thing to do. You should rather open a new issue, or ask on . But to answer your question anyway, that trait only has : … and is stable and can be used on beta. So I’d recommend you copy/paste the trait into your code, or make a function.
Thanks for taking the time to answer. I appreciate it. I don't see how this is unrelated. This is related, since the code I'm talking about used to compile with and the compiler suggests to do that, during the beta period. Thanks for your tip on copying the function :+1: I guess I'll just do that if nothing better is available and change this again when the trait is stable.
This specific issue is about fixing one of the compiler’s error message, not about fixing code that triggers that error. It really helps everyone to keep discussions on topic.
Alright. I understand. I'll make sure to open a new issue or go on StackOverflow next time if appropriate. Thanks again :+1:
This doesn't seem to be properly fixed in the beta channel. I'm still being recommended to add in the errors, and then told it's not available in the beta channel. Rust version: The code I used (snappy example in the docs with the extra addition on the first line:
This happened after Beta release.
Code change:
fn main() { let x = box 3; //~^ ERROR box expression syntax is experimental; you can call `Box::new` instead. <del> //~| HELP add #![feature(box_syntax)] to the crate attributes to enable </del> }

Related discussion:
text: We'll see the effect of this patch in 1.0 and afterwards Beta, etc.
Whoops, I thought this made it in before beta. Thanks!
are there plans to release updates to the beta channel within a given 6 weeks cycle? Either this one or in the future.
I'm certain there will be updates; see discussion from last night here:
So how does one fix this error? I'm a new user of the rust library and I can't seem to use the collections library during the beta due to this problem. Given this git issue is a top google result, it would be nice if there were a solution here. Edit: Looks like the solution is to switch to the rust nightly. Is the entire collections library off-limits in the beta?
by design, you have access to the parts of that are re-exported from (and are stable).
Code change:
<ins> // compile-flags: -Ztrait-solver=next-coherence // Makes sure we don't ICE on associated const projection when the feature gate // is not enabled, since we should avoid encountering ICEs on stable if possible. trait Bar { const ASSOC: usize; } impl Bar for () { const ASSOC: usize = 1; } trait Foo {} impl Foo for () {} impl<T> Foo for T where T: Bar<ASSOC = 0> {} //~^ ERROR associated const equality is incomplete //~| ERROR conflicting implementations of trait `Foo` for type `()` fn main() {} </ins>

Related discussion:
text: <!-- 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. --<!-- 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
Code change:
let scope = if self.monotonic { invoc.expansion_data.mark } else { orig_expansion_data.mark }; <ins> let attr_id_before = invoc.attr_id(); </ins> let ext = match self.cx.resolver.resolve_invoc(&mut invoc, scope, force) { Ok(ext) => Some(ext), Err(Determinacy::Determined) => None, Err(Determinacy::Undetermined) => { <ins> // Sometimes attributes which we thought were invocations // end up being custom attributes for custom derives. If // that's the case our `invoc` will have changed out from // under us. If this is the case we're making progress so we // want to flag it as such, and we test this by looking if // the `attr_id()` method has been changing over time. if invoc.attr_id() != attr_id_before { progress = true; } </ins> undetermined_invocations.push(invoc); continue }

Related discussion:
text: This is the code you are supposed to use according to the lint. It fails to compile, with It compiles fine if you use just one of the two attributes. Swapping attribute order makes it complain about the last non-derive attribute. This seems broken? cc
Confirmed, this behavior is broken. Possibly related to .
As a workaround specific to serde_derive, we allow multiple elements within one attribute.
yeah, that's what I ended up doing
This should be fixed in
Code change:
| LL | extern "C" unsafe { |            ^^^^^^ <ins> | = note: see issue #123743 <https://github.com/rust-lang/rust/issues/123743> for more information = help: add `#![feature(unsafe_extern_blocks)]` to the crate attributes to enable = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date </ins> error: items in unadorned `extern` blocks cannot have safety qualifiers --> $DIR/unsafe-foreign-mod-2.rs:4:5 | LL |     unsafe fn foo(); |     ^^^^^^^^^^^^^^^^ <del> | help: add unsafe to this `extern` block | LL | unsafe extern "C" unsafe { | ++++++ </del> error: aborting due to 3 previous errors

Related discussion:
text: With the following code: We get this error: Making the block then gives: cc
:+1:, this should error in both cases but the diagnostics are misleading. Going to fix it. r?
Code change:
<ins> // Don't suggest double quotes when encountering an expr of type `char` where a `&str` // is expected if the expr is not a char literal. // issue: rust-lang/rust#125595 fn main() { let _: &str = ('a'); //~ ERROR mismatched types let token = || 'a'; let _: &str = token(); //~ ERROR mismatched types } </ins>

Related discussion:
text: <!-- [31mICE[0m: Rustc '' 'thread 'rustc' panicked at 'assertion failed: bpos.tou32() = () + as u32'', 'thread 'rustc' panicked at 'assertion failed: bpos.tou32() = () + as u32'' File: --snippet: Version information Command: <!-- Include a backtrace in the code block by setting in your environment. E.g. . --<details<summary<strongProgram output</strong</summary<p</p</details<!-- query stack: [typeck] type-checking [analysis] running analysis passes on this crate --
cc
Code change:
<ins> error[E0771]: use of non-static lifetime `'a` in const generic --> $DIR/outer-lifetime-in-const-generic-default.rs:4:17 | LL |         let x: &'a (); |                 ^^ | = note: for more information, see issue #74052 <https://github.com/rust-lang/rust/issues/74052> error: aborting due to previous error For more information about this error, try `rustc --explain E0771`. </ins>

Related discussion:
text: Const generic defaults are being stabilized, <!-- 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. --<!-- 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<!-- TRIAGEBOTSTART --<!-- TRIAGEBOTASSIGNSTART --<!-- TRIAGEBOTASSIGNDATASTARTTRIAGEBOTASSIGNDATAEND --<!-- TRIAGEBOTASSIGNEND --<!-- TRIAGEBOTEND --
Seems to also happen with closures:
I got a fix for this one I think. claim
even worse, this compiles on beta but shouldn't
Assigning priority as discussed in the of the Prioritization Working Group. label -I-prioritize +P-critical
I think this needs to remain open until the fix is beta-backported :thinking: not 100% sure on procedure here
You might be correct. At least that's what happened last time one of my PRs was backport nominated (), though I'm not sure if that was due to that being a regression on stable. Regardless, thanks for reopening this.
that's my understading, too. I /think/ issues that are pending a beta/stable backport (like this one) will stay open until the corresponding backport PR has landed. The {stable,beta}-backport procedure is detailed but this detail is not explicited (I'll see if I can fix that to be more clear). For completeness, backports are discussed every Thursday during the compiler team weekly meeting (). Anyway, thanks a lot for fixing this issue and also to + for reporting and debugging :)
Copied from Zulip: Question/thought: Is this a case where tracking bound vars got in the way? Or did it actually help uncover a potential bug?
Not sure what you mean. The bug was that we were just not doing lifetime name resolution at all on const generic defaults. Like this code compiles on beta: edit: ohhh, you mean ?
Code change:
<ins> error[E0771]: use of non-static lifetime `'a` in const generic --> $DIR/outer-lifetime-in-const-generic-default.rs:4:17 | LL |         let x: &'a (); |                 ^^ | = note: for more information, see issue #74052 <https://github.com/rust-lang/rust/issues/74052> error: aborting due to previous error For more information about this error, try `rustc --explain E0771`. </ins>

Related discussion:
text: Yeah I think in this case it helped uncover the bug, because of the fact it ICEd and showed us we weren't resolving the closure default.
I guess this example shows that this did help us uncover a bug, but kind of indirectly: This just didn't uncover a case where "lost" bound vars.
this is now fixed on beta
Code change:
/// ``` ``` <ins> As of version 1.34.0, one can also omit the `fn main()`, but you will have to disambiguate the error type: ```ignore /// ``` /// use std::io; /// let mut input = String::new(); /// io::stdin().read_line(&mut input)?; /// # Ok::<(), io:Error>(()) /// ``` ``` This is an unfortunate consequence of the `?` operator adding an implicit conversion, so type inference fails because the type is not unique. Please note that you must write the `(())` in one sequence without intermediate whitespace so that rustdoc understands you want an implicit `Result`-returning function. </ins> ## Documenting macros Here’s an example of documenting a macro:

Related discussion:
text: Rustdoc now allows us to use in our tests. Unfortunately, this requires writing the manually, which really shouldn't be needed IMHO. So we now have to write: rust ///# fn main() -Result<(), (){ /// let foo = Ok(1usize); /// assert!(foo? 0); ///# } /// where it should suffice to write: rust /// let foo = Ok(1usize); /// assert!(foo? 0); /// Doing so will make the tests shorter and hopefully lead to more and less in tests.
Feels like a no-brainer to me; would be great. :)
I think there are two things we want before doing this: , so that it can always be , and existing code will just work. The re-do, so we can make a type that accepts any error type (since it'll just error anyway).
?
Yes, that's what I'm thinking, and I'm setting up a PR for that. However, it's still unstable.
I talked about this back in March on the " in main" tracking issue: That sample you gave isn't even valid as-is, unless coercing to is also in the pipeline?
That'll be next, hopefully. I wonder if it suffices to or if we need to keep a generic error type (which might mess with type inference). In any event, having both the aforementioned and should be a no-brainer, right?
Code change:
<ins> error: macro-expanded `extern crate` items cannot shadow names passed with `--extern` --> $DIR/issue-78325-inconsistent-resolution.rs:3:9 | LL |         extern crate std as core; |         ^^^^^^^^^^^^^^^^^^^^^^^^^ ... LL | define_other_core!(); | --------------------- in this macro invocation | = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info) error: aborting due to previous error </ins>

Related discussion:
text: <!-- 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. --<!-- 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</detailsNOTE: The bug is found by our work-in-progress compiler testing tool Kira, and the test program is reduced/minimized by
Seems to have regressed in Rust 1.33 based on testing in Godbolt.
With only the errors relevant to the ICE:
I'll fix this.
Fixed in