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Better Debug for Vars and VarsOs#114132

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tamird:better-env-debug-impls
Aug 12, 2023
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Better Debug for Vars and VarsOs#114132
bors merged 1 commit intorust-lang:masterfrom
tamird:better-env-debug-impls

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@tamird tamird commented Jul 27, 2023

Display actual vars instead of two dots.

The same was done for Args and ArgsOs in 275f9a0.

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r? @cuviper

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@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-libs Relevant to the library team, which will review and decide on the PR/issue. labels Jul 27, 2023
@tamird tamird force-pushed the better-env-debug-impls branch from 987b627 to a99b5c4 Compare July 27, 2023 15:22
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cuviper reviewed Jul 27, 2023
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@rustbot rustbot assigned Amanieu and unassigned cuviper Jul 27, 2023
@tamird tamird force-pushed the better-env-debug-impls branch 2 times, most recently from 9f46040 to c9f89d1 Compare July 27, 2023 17:14
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tamird commented Aug 2, 2023

@cuviper @Amanieu ping.

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Amanieu commented Aug 4, 2023

This is missing Debug impls for all the other OSes. Search for pub struct Env in library/std/src/sys.

Perhaps it would be easier if the debug printing logic was in the common code and the underlying OS-specific iterator could just be cloned?

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tamird commented Aug 4, 2023

This is missing Debug impls for all the other OSes. Search for pub struct Env in library/std/src/sys.

Perhaps it would be easier if the debug printing logic was in the common code and the underlying OS-specific iterator could just be cloned?

I'd rather not introduce additional allocations. Done.

@tamird tamird force-pushed the better-env-debug-impls branch from c9f89d1 to 3b5f414 Compare August 4, 2023 12:19
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Amanieu commented Aug 4, 2023

@bors r+

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bors commented Aug 4, 2023

📌 Commit 3b5f41477d4c279c9870d567e31965619396d9f1 has been approved by Amanieu

It is now in the queue for this repository.

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Aug 4, 2023
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bors commented Aug 4, 2023

⌛ Testing commit 3b5f41477d4c279c9870d567e31965619396d9f1 with merge 1ef1988cc8a8ac40375b19a25a71cf9546abdbc4...

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bors commented Aug 4, 2023

💔 Test failed - checks-actions

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@tamird tamird force-pushed the better-env-debug-impls branch from 3b5f414 to 216edcb Compare August 4, 2023 14:34
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tamird commented Aug 4, 2023

Missed a necessary deref, should compile now.

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Amanieu commented Aug 4, 2023

@bors r+

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bors commented Aug 4, 2023

📌 Commit 216edcb has been approved by Amanieu

It is now in the queue for this repository.

@bors bors removed the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Aug 4, 2023
@bors bors added the S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. label Aug 4, 2023
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request Aug 5, 2023
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Rollup merge of rust-lang#114132 - tamird:better-env-debug-impls, r=A…
2628780 
…manieu

Better Debug for Vars and VarsOs

Display actual vars instead of two dots.

The same was done for Args and ArgsOs in 275f9a0.
@matthiaskrgr matthiaskrgr mentioned this pull request Aug 5, 2023
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matthiaskrgr commented Aug 5, 2023

@bors r-
failed in #114506 (comment)
2023-08-05T11:51:16.2355078Z thread 'env::tests::vars_debug' panicked at library\std\src\env\tests.rs:110:5:

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tamird commented Aug 5, 2023

Looks like an environment variable containing a single quoted string on windows was the culprit:

 (\"VERBOSE_ARG\",
-\"'SilentlyContinue'\"),
+\"\\'SilentlyContinue\\'\"),

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tamird commented Aug 5, 2023

This is caused by <Vars as Debug>::fmt not converting to str internally and the slight difference between <str as Debug>::fmt and <OsString as Debug>::fmt. Repro: https://play.rust-lang.org/?version=stable&mode=debug&edition=2021&gist=9577395fe35685cbae74fc74185e28e9.

Will fix momentarily.

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Better Debug for Vars and VarsOs
35c0c03 
Display actual vars instead of two dots.

The same was done for Args and ArgsOs in 275f9a0.
@tamird tamird force-pushed the better-env-debug-impls branch from 216edcb to 35c0c03 Compare August 7, 2023 16:18
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tamird commented Aug 7, 2023

This should be ready for another run.

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library/std/src/sys/hermit/os.rs
}

// FIXME(https://github.com/rust-lang/rust/issues/114583): Remove this when <OsStr as Debug>::fmt matches <str as Debug>::fmt.
pub struct EnvStrDebug<'a> {
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Could we avoid the code duplication here and move EnvStrDebug into common code?

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Not without introducing additional allocations.

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Perhaps I should elaborate. The various Env structures contain iterators - even when they are backed by vectors - so it isn't possible to implement Debug without iterating those iterators. This means the iterators must be cloned. In the case of a vector-backed iterator, cloning would allocate, which this approach avoids.

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Amanieu commented Aug 11, 2023

@bors r+

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bors commented Aug 11, 2023

📌 Commit 35c0c03 has been approved by Amanieu

It is now in the queue for this repository.

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Aug 11, 2023
@matthiaskrgr matthiaskrgr mentioned this pull request Aug 12, 2023
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matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request Aug 12, 2023
@matthiaskrgr
Rollup merge of rust-lang#114132 - tamird:better-env-debug-impls, r=A…
7879823 
…manieu

Better Debug for Vars and VarsOs

Display actual vars instead of two dots.

The same was done for Args and ArgsOs in 275f9a0.
@matthiaskrgr matthiaskrgr mentioned this pull request Aug 12, 2023
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bors added a commit to rust-lang-ci/rust that referenced this pull request Aug 12, 2023
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Auto merge of rust-lang#114756 - matthiaskrgr:rollup-4m7l4p6, r=matth…
cbb48a5 
…iaskrgr

Rollup of 7 pull requests

Successful merges:

 - rust-lang#94455 (Partially stabilize `int_roundings`)
 - rust-lang#114132 (Better Debug for Vars and VarsOs)
 - rust-lang#114584 (E0277 nolonger points at phantom `.await`)
 - rust-lang#114667 (Record binder for bare trait object in LifetimeCollectVisitor)
 - rust-lang#114692 (downgrade `internal_features` to warn)
 - rust-lang#114703 (Cover ParamConst in smir)
 - rust-lang#114734 (Mark oli as "on vacation")

r? `@ghost`
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@bors bors merged commit 8a997b1 into rust-lang:master Aug 12, 2023
@rustbot rustbot added this to the 1.73.0 milestone Aug 12, 2023
@tamird tamird deleted the better-env-debug-impls branch August 13, 2023 13:58
@tamird tamird mentioned this pull request Nov 13, 2025
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