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Add missing long error code explanations #61137

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GuillaumeGomez opened this issue May 24, 2019 · 69 comments · Fixed by #108482
Closed
98 of 100 tasks

Add missing long error code explanations #61137

GuillaumeGomez opened this issue May 24, 2019 · 69 comments · Fixed by #108482
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A-diagnostics Area: Messages for errors, warnings, and lints A-docs Area: documentation for any part of the project, including the compiler, standard library, and tools D-newcomer-roadblock Diagnostics: Confusing error or lint; hard to understand for new users. E-easy Call for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue. E-help-wanted Call for participation: Help is requested to fix this issue. metabug Issues about issues themselves ("bugs about bugs") T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.

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@GuillaumeGomez
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GuillaumeGomez commented May 24, 2019 •
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This is a re-opening of #32777.

Explanations

Those error codes and their explanations are declared in files named error_codes.rs. In those files, you can see generally two macros: register_diagnostics and register_long_diagnostics. If an error code is in register_diagnostics, it means it lacks long error explanation. The goal of this issue is to add those missing explanations!

This is an easy first issue but don't hesitate to ask for help if you're stuck on something!

Here is the list of all error codes that don't have a long error explanation yet:
@GuillaumeGomez GuillaumeGomez added E-easy Call for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue. A-diagnostics Area: Messages for errors, warnings, and lints labels May 24, 2019
@GuillaumeGomez GuillaumeGomez mentioned this issue May 24, 2019
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@estebank estebank mentioned this issue May 25, 2019
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@imbrem
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imbrem commented May 25, 2019

Can I take one of these on?

@GuillaumeGomez
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@imbrem: Sure, go ahead! When you open a PR, please link to this issue so others can see what's being worked on.

@imbrem imbrem mentioned this issue May 26, 2019
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imbrem commented May 26, 2019

Done! Actually, should I have requested/should I request you as a reviewer?

ewk added a commit to ewk/rust that referenced this issue May 27, 2019
@ewk
Add missing error code explanation for E0183
69db412 
This is part of the ongoing work for rust-lang#61137
@ewk ewk mentioned this issue May 27, 2019
Closed
Centril added a commit to Centril/rust that referenced this issue May 28, 2019
@Centril
Rollup merge of rust-lang#61220 - imbrem:error_explanations, r=estebank
3b51579 
Added error message for E0284

Work on rust-lang#61137
@Krout0n
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Krout0n commented May 31, 2019

Can I take one of these on too?

@GuillaumeGomez
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Sure, go ahead (and thanks!). Just like I told previously: don't forget to link to this issue once your PR is open so we can keep track. :)

@JohnTitor JohnTitor mentioned this issue Jun 14, 2019
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bors added a commit that referenced this issue Jun 18, 2019
@bors
Auto merge of #61822 - JohnTitor:add-long-e0592, r=GuillaumeGomez,Cen…
0376941 
…tril

Add explanation for E0592

This is a part of #61137

r? @GuillaumeGomez
@estebank estebank added the A-docs Area: documentation for any part of the project, including the compiler, standard library, and tools label Jul 12, 2019
@Karrq Karrq mentioned this issue Jul 26, 2019
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@estebank
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estebank commented Sep 5, 2019

E0307 handled in #64110.

This was referenced Sep 10, 2019
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@Mark-Simulacrum Mark-Simulacrum added E-help-wanted Call for participation: Help is requested to fix this issue. E-mentor Call for participation: This issue has a mentor. Use #t-compiler/help on Zulip for discussion. and removed E-mentor Call for participation: This issue has a mentor. Use #t-compiler/help on Zulip for discussion. labels Sep 11, 2019
@GuillaumeGomez GuillaumeGomez mentioned this issue Sep 12, 2019
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Centril added a commit to Centril/rust that referenced this issue Sep 13, 2019
@Centril
Rollup merge of rust-lang#64377 - GuillaumeGomez:E0493, r=estebank
1059ddd 
Add long error explanation for E0493

Part of rust-lang#61137.
This was referenced Sep 13, 2019
Merged
Merged
Centril added a commit to Centril/rust that referenced this issue Sep 21, 2019
@Centril
Rollup merge of rust-lang#64347 - GuillaumeGomez:E0312, r=oli-obk
a93c0da 
Add long error explanation for E0312

Part of rust-lang#61137.
Centril added a commit to Centril/rust that referenced this issue Sep 23, 2019
@Centril
Rollup merge of rust-lang#64428 - GuillaumeGomez:error-explanation-E0…
5d8a8b6 
…524, r=Centril

Error explanation e0524

Part of rust-lang#61137
Centril added a commit to Centril/rust that referenced this issue Sep 24, 2019
@Centril
Rollup merge of rust-lang#64428 - GuillaumeGomez:error-explanation-E0…
8f9ad07 
…524, r=Centril

Error explanation e0524

Part of rust-lang#61137
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this issue Dec 19, 2022
@matthiaskrgr
Rollup merge of rust-lang#105860 - Ezrashaw:add-long-errors-0460-0457…
6e6ec81 
…, r=jruderman,GuillaumeGomez

Add long error docs for `E0460` and `E0457`

Final docs for errors in rust-lang#61137 that have UI tests, my next PRs will also add these tests.

r? ``@GuillaumeGomez``
This was referenced Dec 20, 2022
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@bindsdev
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I was working on adding an explanation for E0313. But, I hit a roadblock in doing so and I was recommended by other contributors to propose a deprecation for the error code (#103742) since it seemingly isn't emitted anymore by the current revision of the borrow checker and it has no UI tests. Please view the reference issue for more background.

This was referenced Dec 29, 2022
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Merged
jyn514 added a commit to jyn514/rust that referenced this issue Dec 30, 2022
@jyn514
Rollup merge of rust-lang#106282 - Ezrashaw:merge-e0465, r=estebank
690f0f7 
refactor: merge error code `E0465` into `E0464`

`E0465` is an undocumented and untested error code that is functionally identical to `E0464`. This PR merges `E0465` into `E0464`, thus documenting and testing another error code (rust-lang#61137).

r? `@GuillaumeGomez` (not sure if you want to review this but it's relevant to my other PRs that you have reviewed)
bors added a commit to rust-lang-ci/rust that referenced this issue Dec 31, 2022
@bors
Auto merge of rust-lang#106282 - Ezrashaw:merge-e0465, r=estebank
574b64a 
refactor: merge error code `E0465` into `E0464`

`E0465` is an undocumented and untested error code that is functionally identical to `E0464`. This PR merges `E0465` into `E0464`, thus documenting and testing another error code (rust-lang#61137).

r? `@GuillaumeGomez` (not sure if you want to review this but it's relevant to my other PRs that you have reviewed)
@oskgo oskgo mentioned this issue Jan 6, 2023
Merged
@Ezrashaw Ezrashaw mentioned this issue Jan 8, 2023
Merged
JohnTitor pushed a commit to JohnTitor/rust that referenced this issue Jan 8, 2023
Rollup merge of rust-lang#106580 - Ezrashaw:remove-e0313, r=compiler-…
ec549d9 
…errors

remove unreachable error code `E0313`

Fixes rust-lang#103742
Makes rust-lang#103433 redundant

Implements removal of `E0313`. I agree with the linked issue that this error code is unreachable but if someone could confirm that would be great, are crater runs done for this sort of thing?

Also removed a redundant `// ignore-tidy-filelength` that I found while reading code.

cc `@GuillaumeGomez` rust-lang#61137
JohnTitor pushed a commit to JohnTitor/rust that referenced this issue Jan 8, 2023
Rollup merge of rust-lang#106580 - Ezrashaw:remove-e0313, r=compiler-…
6459a51 
…errors

remove unreachable error code `E0313`

Fixes rust-lang#103742
Makes rust-lang#103433 redundant

Implements removal of `E0313`. I agree with the linked issue that this error code is unreachable but if someone could confirm that would be great, are crater runs done for this sort of thing?

Also removed a redundant `// ignore-tidy-filelength` that I found while reading code.

cc ``@GuillaumeGomez`` rust-lang#61137
JohnTitor pushed a commit to JohnTitor/rust that referenced this issue Jan 11, 2023
Rollup merge of rust-lang#106521 - oskgo:remove-E0280, r=jackh726
12b1242 
remove E0280

After looking at rust-lang#61137 I tried my hand at E0280. I'm unable to find a reasonable example that emits the error. There are a couple of old examples that compile with the current compiler ([rust-lang#26217](rust-lang#26217), [rust-lang#42114](rust-lang#42114), [rust-lang#27113](rust-lang#27113)) and there is a [bug with chalk](https://github.com/rust-lang/rust/blob/b7cdb635c4b973572307ad288466fba64533369c/src/test/ui/chalkify/bugs/async.rs) that makes it emit the error, with a couple more chalk bugs on zulip.

It seems like the error is supposed to be emitted from unfulfilled where bounds, of which two are related to borrow checking (error in where T: 'a or where 'a: 'b) and thus tend to emit errors like "lifetime may not live long enough" from borrow checking instead. The final case is with type equality constraints (where <T as Iterator>::Item == u32), which is unimplemented ([rust-lang#20041](rust-lang#20041)). That such different problems are supposed to have the same error code also seems strange to me.

Since the error seems to only be emitted when using chalk I propose to remove it and replace it with an ICE instead. A crater run might be warranted.

Pinging `@jackh726` due to removal of chalk test that now ICEs.
@Ezrashaw Ezrashaw mentioned this issue Jan 11, 2023
Merged
Nilstrieb added a commit to Nilstrieb/rust that referenced this issue Jan 12, 2023
@Nilstrieb
Rollup merge of rust-lang#106714 - Ezrashaw:remove-e0490, r=davidtwco
4a0626e 
remove unreachable error code `E0490`

AFAIK, the untested and undocumented error code `E0490` is now unreachable, it was from the days of the original borrow checker.

cc `@GuillaumeGomez` rust-lang#61137
Nilstrieb added a commit to Nilstrieb/rust that referenced this issue Jan 12, 2023
@Nilstrieb
Rollup merge of rust-lang#106714 - Ezrashaw:remove-e0490, r=davidtwco
c61f29c 
remove unreachable error code `E0490`

AFAIK, the untested and undocumented error code `E0490` is now unreachable, it was from the days of the original borrow checker.

cc ``@GuillaumeGomez`` rust-lang#61137
@Ezrashaw Ezrashaw mentioned this issue Jan 14, 2023
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@Ezrashaw
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@GuillaumeGomez sigh, turns out that E0476 isn't unreachable, I'll have to document it instead.

@GuillaumeGomez
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It's fine. I'll update the list once the new PR is open.

@GuillaumeGomez GuillaumeGomez mentioned this issue Jan 16, 2023
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GuillaumeGomez added a commit to GuillaumeGomez/rust that referenced this issue Jan 19, 2023
@GuillaumeGomez
Rollup merge of rust-lang#106931 - Ezrashaw:docs-e0208, r=compiler-er…
246daa4 
…rors

document + UI test `E0208` and make its output more user-friendly

Cleans up `E0208`'s output a lot. It could actually be useful for someone learning about variance now. I also added a UI test for it in `tests/ui/error-codes/` and wrote some docs for it.

r? `@GuillaumeGomez` another error code, can't be bothered to find the issue :P. Obviously there's some compiler stuff, so you'll have to hand it off.

Part of rust-lang#61137.
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this issue Feb 6, 2023
@matthiaskrgr
Rollup merge of rust-lang#100599 - MatthewPeterKelly:add-E0523-descri…
83f5954 
…ption-and-test, r=compiler-errors,GuillaumeGomez

Add compiler error E0523 long description and test

This PR is one step towards addressing:  rust-lang#61137.
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this issue Feb 7, 2023
@matthiaskrgr
Rollup merge of rust-lang#100599 - MatthewPeterKelly:add-E0523-descri…
6d225bb 
…ption-and-test, r=compiler-errors,GuillaumeGomez

Add compiler error E0523 long description and test

This PR is one step towards addressing:  rust-lang#61137.
@GuillaumeGomez GuillaumeGomez mentioned this issue Feb 25, 2023
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compiler-errors added a commit to compiler-errors/rust that referenced this issue Feb 25, 2023
@compiler-errors
Rollup merge of rust-lang#108444 - Ezrashaw:add-test+docs-for-e0476, …
c894630 
…r=GuillaumeGomez

docs/test: add UI test and docs for `E0476`

Final undocumented error code. Not entirely sure about wording in the docs.

Part of rust-lang#61137.

r? `@compiler-errors`

cc `@compiler-errors`
compiler-errors added a commit to compiler-errors/rust that referenced this issue Feb 25, 2023
@compiler-errors
Rollup merge of rust-lang#108444 - Ezrashaw:add-test+docs-for-e0476, …
cb58440 
…r=GuillaumeGomez

docs/test: add UI test and docs for `E0476`

Final undocumented error code. Not entirely sure about wording in the docs.

Part of rust-lang#61137.

r? ``@compiler-errors``

cc ``@compiler-errors``
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this issue Feb 25, 2023
@matthiaskrgr
Rollup merge of rust-lang#108444 - Ezrashaw:add-test+docs-for-e0476, …
65eecc6 
…r=GuillaumeGomez

docs/test: add UI test and docs for `E0476`

Final undocumented error code. Not entirely sure about wording in the docs.

Part of rust-lang#61137.

r? ```@compiler-errors```

cc ```@compiler-errors```
@Ezrashaw Ezrashaw mentioned this issue Feb 26, 2023
Merged
@bors bors closed this as completed in edd27cf Feb 26, 2023
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A-diagnostics Area: Messages for errors, warnings, and lints A-docs Area: documentation for any part of the project, including the compiler, standard library, and tools D-newcomer-roadblock Diagnostics: Confusing error or lint; hard to understand for new users. E-easy Call for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue. E-help-wanted Call for participation: Help is requested to fix this issue. metabug Issues about issues themselves ("bugs about bugs") T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
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statically guarantee that current error codes are documented Ezrashaw/rust