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unused_extern_crates false positives #42591

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ishitatsuyuki opened this issue Jun 11, 2017 · 0 comments · Fixed by #42588
Closed

unused_extern_crates false positives #42591

ishitatsuyuki opened this issue Jun 11, 2017 · 0 comments · Fixed by #42588
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A-lint Area: Lints (warnings about flaws in source code) such as unused_mut. C-bug Category: This is a bug.

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@ishitatsuyuki
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ishitatsuyuki commented Jun 11, 2017 •
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List of crates that can suffer from the link-only false positives:

  • compiler_builtins
  • panic runtimes

Allocators used to, but not after redesign.
@ishitatsuyuki ishitatsuyuki mentioned this issue Jun 11, 2017
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@Mark-Simulacrum Mark-Simulacrum added the A-lint Area: Lints (warnings about flaws in source code) such as unused_mut. label Jun 23, 2017
@Mark-Simulacrum Mark-Simulacrum changed the title unused_extern_crates false positive: alloc_system unused_extern_crates false positives Jun 23, 2017
@Mark-Simulacrum Mark-Simulacrum added the C-bug Category: This is a bug. label Jul 27, 2017
bors added a commit that referenced this issue Aug 27, 2017
@bors
Auto merge of #42588 - ishitatsuyuki:patch-1, r=petrochenkov
78e95bb 
Make unused-extern-crate warn-by-default

Apart from enabling the lint, this pull request also removes existing unused crates in the codebase, and fix some amount of false positives on crates with special purposes.

Now that all false positive issues are closed, it should be possible to make it available to wider users.

Quote:
> Now that macro modularization is implemented, this is true today! *#30849 (comment)

Concerns: can break some `#[deny(warnings)]`.

Close #42591
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A-lint Area: Lints (warnings about flaws in source code) such as unused_mut. C-bug Category: This is a bug.
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Make unused-extern-crate warn-by-default ishitatsuyuki/rust
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@Mark-Simulacrum @ishitatsuyuki