Point at lint name instead of whole attr for gated lints

estebank · estebank · commit 19e44f4db48e · 2024-12-18T19:27:44.000Z
```
warning: unknown lint: `test_unstable_lint`
  --&gt; $DIR/warn-unknown-unstable-lint-inline.rs:4:10
   |
LL | #![allow(test_unstable_lint, another_unstable_lint)]
   |          ^^^^^^^^^^^^^^^^^^
   |
   = note: the `test_unstable_lint` lint is unstable
   = help: add `#![feature(test_unstable_lint)]` to the crate attributes to enable
   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
note: the lint level is defined here
  --&gt; $DIR/warn-unknown-unstable-lint-inline.rs:3:9
   |
LL | #![warn(unknown_lints)]
   |         ^^^^^^^^^^^^^

warning: unknown lint: `test_unstable_lint`
  --&gt; $DIR/warn-unknown-unstable-lint-inline.rs:4:29
   |
LL | #![allow(test_unstable_lint, another_unstable_lint)]
   |                              ^^^^^^^^^^^^^^^^^^^^^
   |
   = note: the `test_unstable_lint` lint is unstable
   = help: add `#![feature(test_unstable_lint)]` to the crate attributes to enable
   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
note: the lint level is defined here
  --&gt; $DIR/warn-unknown-unstable-lint-inline.rs:3:9
   |
LL | #![warn(unknown_lints)]
   |         ^^^^^^^^^^^^^
```

This is particularly relevant when there are multiple lints in the same `warn` attribute. Pointing at the smaller span makes it clearer which one the warning is complaining about.
diff --git a/compiler/rustc_lint/src/levels.rs b/compiler/rustc_lint/src/levels.rs
@@ -915,7 +915,7 @@ impl<'s, P: LintLevelsProvider> LintLevelsBuilder<'s, P> {
 
                 let src = LintLevelSource::Node { name, span: sp, reason };
                 for &id in ids {
-                    if self.check_gated_lint(id, attr.span(), false) {
+                    if self.check_gated_lint(id, sp, false) {
                         self.insert_spec(id, (level, src));
                     }
                 }
diff --git a/tests/rustdoc-ui/lints/feature-gate-rustdoc_missing_doc_code_examples.stderr b/tests/rustdoc-ui/lints/feature-gate-rustdoc_missing_doc_code_examples.stderr
@@ -1,8 +1,8 @@
 error: unknown lint: `rustdoc::missing_doc_code_examples`
-  --> $DIR/feature-gate-rustdoc_missing_doc_code_examples.rs:4:1
+  --> $DIR/feature-gate-rustdoc_missing_doc_code_examples.rs:4:10
    |
 LL | #![allow(rustdoc::missing_doc_code_examples)]
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: the `rustdoc::missing_doc_code_examples` lint is unstable
    = note: see issue #101730 <https://github.com/rust-lang/rust/issues/101730> for more information
diff --git a/tests/ui/feature-gates/feature-gate-multiple_supertrait_upcastable.stderr b/tests/ui/feature-gates/feature-gate-multiple_supertrait_upcastable.stderr
@@ -1,19 +1,19 @@
 warning: unknown lint: `multiple_supertrait_upcastable`
-  --> $DIR/feature-gate-multiple_supertrait_upcastable.rs:3:1
+  --> $DIR/feature-gate-multiple_supertrait_upcastable.rs:3:9
    |
 LL | #![deny(multiple_supertrait_upcastable)]
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: the `multiple_supertrait_upcastable` lint is unstable
    = help: add `#![feature(multiple_supertrait_upcastable)]` to the crate attributes to enable
    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
    = note: `#[warn(unknown_lints)]` on by default
 
 warning: unknown lint: `multiple_supertrait_upcastable`
-  --> $DIR/feature-gate-multiple_supertrait_upcastable.rs:5:1
+  --> $DIR/feature-gate-multiple_supertrait_upcastable.rs:5:9
    |
 LL | #![warn(multiple_supertrait_upcastable)]
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: the `multiple_supertrait_upcastable` lint is unstable
    = help: add `#![feature(multiple_supertrait_upcastable)]` to the crate attributes to enable
diff --git a/tests/ui/feature-gates/feature-gate-non_exhaustive_omitted_patterns_lint.stderr b/tests/ui/feature-gates/feature-gate-non_exhaustive_omitted_patterns_lint.stderr
@@ -1,8 +1,8 @@
 warning: unknown lint: `non_exhaustive_omitted_patterns`
-  --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:3:1
+  --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:3:9
    |
 LL | #![deny(non_exhaustive_omitted_patterns)]
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: the `non_exhaustive_omitted_patterns` lint is unstable
    = note: see issue #89554 <https://github.com/rust-lang/rust/issues/89554> for more information
@@ -11,32 +11,32 @@ LL | #![deny(non_exhaustive_omitted_patterns)]
    = note: `#[warn(unknown_lints)]` on by default
 
 warning: unknown lint: `non_exhaustive_omitted_patterns`
-  --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:5:1
+  --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:5:10
    |
 LL | #![allow(non_exhaustive_omitted_patterns)]
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: the `non_exhaustive_omitted_patterns` lint is unstable
    = note: see issue #89554 <https://github.com/rust-lang/rust/issues/89554> for more information
    = help: add `#![feature(non_exhaustive_omitted_patterns_lint)]` to the crate attributes to enable
    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
 
 warning: unknown lint: `non_exhaustive_omitted_patterns`
-  --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:15:5
+  --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:15:13
    |
 LL |     #[allow(non_exhaustive_omitted_patterns)]
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: the `non_exhaustive_omitted_patterns` lint is unstable
    = note: see issue #89554 <https://github.com/rust-lang/rust/issues/89554> for more information
    = help: add `#![feature(non_exhaustive_omitted_patterns_lint)]` to the crate attributes to enable
    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
 
 warning: unknown lint: `non_exhaustive_omitted_patterns`
-  --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:15:5
+  --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:15:13
    |
 LL |     #[allow(non_exhaustive_omitted_patterns)]
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: the `non_exhaustive_omitted_patterns` lint is unstable
    = note: see issue #89554 <https://github.com/rust-lang/rust/issues/89554> for more information
@@ -45,21 +45,21 @@ LL |     #[allow(non_exhaustive_omitted_patterns)]
    = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 warning: unknown lint: `non_exhaustive_omitted_patterns`
-  --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:24:5
+  --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:24:12
    |
 LL |     #[warn(non_exhaustive_omitted_patterns)]
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: the `non_exhaustive_omitted_patterns` lint is unstable
    = note: see issue #89554 <https://github.com/rust-lang/rust/issues/89554> for more information
    = help: add `#![feature(non_exhaustive_omitted_patterns_lint)]` to the crate attributes to enable
    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
 
 warning: unknown lint: `non_exhaustive_omitted_patterns`
-  --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:24:5
+  --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:24:12
    |
 LL |     #[warn(non_exhaustive_omitted_patterns)]
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: the `non_exhaustive_omitted_patterns` lint is unstable
    = note: see issue #89554 <https://github.com/rust-lang/rust/issues/89554> for more information
diff --git a/tests/ui/feature-gates/feature-gate-strict_provenance_lints.stderr b/tests/ui/feature-gates/feature-gate-strict_provenance_lints.stderr
@@ -1,8 +1,8 @@
 warning: unknown lint: `fuzzy_provenance_casts`
-  --> $DIR/feature-gate-strict_provenance_lints.rs:3:1
+  --> $DIR/feature-gate-strict_provenance_lints.rs:3:9
    |
 LL | #![deny(fuzzy_provenance_casts)]
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |         ^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: the `fuzzy_provenance_casts` lint is unstable
    = note: see issue #130351 <https://github.com/rust-lang/rust/issues/130351> for more information
@@ -11,10 +11,10 @@ LL | #![deny(fuzzy_provenance_casts)]
    = note: `#[warn(unknown_lints)]` on by default
 
 warning: unknown lint: `lossy_provenance_casts`
-  --> $DIR/feature-gate-strict_provenance_lints.rs:5:1
+  --> $DIR/feature-gate-strict_provenance_lints.rs:5:9
    |
 LL | #![deny(lossy_provenance_casts)]
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |         ^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: the `lossy_provenance_casts` lint is unstable
    = note: see issue #130351 <https://github.com/rust-lang/rust/issues/130351> for more information
diff --git a/tests/ui/feature-gates/feature-gate-test_unstable_lint.stderr b/tests/ui/feature-gates/feature-gate-test_unstable_lint.stderr
@@ -1,8 +1,8 @@
 warning: unknown lint: `test_unstable_lint`
-  --> $DIR/feature-gate-test_unstable_lint.rs:4:1
+  --> $DIR/feature-gate-test_unstable_lint.rs:4:10
    |
 LL | #![allow(test_unstable_lint)]
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |          ^^^^^^^^^^^^^^^^^^
    |
    = note: the `test_unstable_lint` lint is unstable
    = help: add `#![feature(test_unstable_lint)]` to the crate attributes to enable
diff --git a/tests/ui/feature-gates/feature-gate-unqualified-local-imports.stderr b/tests/ui/feature-gates/feature-gate-unqualified-local-imports.stderr
@@ -1,8 +1,8 @@
 warning: unknown lint: `unqualified_local_imports`
-  --> $DIR/feature-gate-unqualified-local-imports.rs:3:1
+  --> $DIR/feature-gate-unqualified-local-imports.rs:3:10
    |
 LL | #![allow(unqualified_local_imports)]
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |          ^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: the `unqualified_local_imports` lint is unstable
    = help: add `#![feature(unqualified_local_imports)]` to the crate attributes to enable
diff --git a/tests/ui/lint/must_not_suspend/gated.stderr b/tests/ui/lint/must_not_suspend/gated.stderr
@@ -1,8 +1,8 @@
 warning: unknown lint: `must_not_suspend`
-  --> $DIR/gated.rs:4:1
+  --> $DIR/gated.rs:4:9
    |
 LL | #![deny(must_not_suspend)]
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |         ^^^^^^^^^^^^^^^^
    |
    = note: the `must_not_suspend` lint is unstable
    = note: see issue #83310 <https://github.com/rust-lang/rust/issues/83310> for more information
diff --git a/tests/ui/unknown-unstable-lints/deny-unstable-lint-inline.stderr b/tests/ui/unknown-unstable-lints/deny-unstable-lint-inline.stderr
@@ -1,8 +1,8 @@
 error: unknown lint: `test_unstable_lint`
-  --> $DIR/deny-unstable-lint-inline.rs:4:1
+  --> $DIR/deny-unstable-lint-inline.rs:4:10
    |
 LL | #![allow(test_unstable_lint)]
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |          ^^^^^^^^^^^^^^^^^^
    |
    = note: the `test_unstable_lint` lint is unstable
    = help: add `#![feature(test_unstable_lint)]` to the crate attributes to enable
diff --git a/tests/ui/unknown-unstable-lints/warn-unknown-unstable-lint-inline.stderr b/tests/ui/unknown-unstable-lints/warn-unknown-unstable-lint-inline.stderr
@@ -1,8 +1,8 @@
 warning: unknown lint: `test_unstable_lint`
-  --> $DIR/warn-unknown-unstable-lint-inline.rs:4:1
+  --> $DIR/warn-unknown-unstable-lint-inline.rs:4:10
    |
 LL | #![allow(test_unstable_lint)]
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |          ^^^^^^^^^^^^^^^^^^
    |
    = note: the `test_unstable_lint` lint is unstable
    = help: add `#![feature(test_unstable_lint)]` to the crate attributes to enable

Original file line number	Diff line number	Diff line change
`@@ -915,7 +915,7 @@ impl<'s, P: LintLevelsProvider> LintLevelsBuilder<'s, P> {`
`915`	`915`
`916`	`916`	`let src = LintLevelSource::Node { name, span: sp, reason };`
`917`	`917`	`for &id in ids {`
`918`		`- if self.check_gated_lint(id, attr.span(), false) {`
	`918`	`+ if self.check_gated_lint(id, sp, false) {`
`919`	`919`	`self.insert_spec(id, (level, src));`
`920`	`920`	`}`
`921`	`921`	`}`
Original file line number	Diff line number	Diff line change
`@@ -1,8 +1,8 @@`
`1`	`1`	error: unknown lint: `rustdoc::missing_doc_code_examples`
`2`		`- --> $DIR/feature-gate-rustdoc_missing_doc_code_examples.rs:4:1`
	`2`	`+ --> $DIR/feature-gate-rustdoc_missing_doc_code_examples.rs:4:10`
`3`	`3`	`\|`
`4`	`4`	`LL \| #![allow(rustdoc::missing_doc_code_examples)]`
`5`		`- \| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^`
	`5`	`+ \| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^`
`6`	`6`	`\|`
`7`	`7`	= note: the `rustdoc::missing_doc_code_examples` lint is unstable
`8`	`8`	`= note: see issue #101730 <https://github.com/rust-lang/rust/issues/101730> for more information`
Original file line number	Diff line number	Diff line change
`@@ -1,19 +1,19 @@`
`1`	`1`	warning: unknown lint: `multiple_supertrait_upcastable`
`2`		`- --> $DIR/feature-gate-multiple_supertrait_upcastable.rs:3:1`
	`2`	`+ --> $DIR/feature-gate-multiple_supertrait_upcastable.rs:3:9`
`3`	`3`	`\|`
`4`	`4`	`LL \| #![deny(multiple_supertrait_upcastable)]`
`5`		`- \| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^`
	`5`	`+ \| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^`
`6`	`6`	`\|`
`7`	`7`	= note: the `multiple_supertrait_upcastable` lint is unstable
`8`	`8`	= help: add `#![feature(multiple_supertrait_upcastable)]` to the crate attributes to enable
`9`	`9`	`= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date`
`10`	`10`	= note: `#[warn(unknown_lints)]` on by default
`11`	`11`
`12`	`12`	warning: unknown lint: `multiple_supertrait_upcastable`
`13`		`- --> $DIR/feature-gate-multiple_supertrait_upcastable.rs:5:1`
	`13`	`+ --> $DIR/feature-gate-multiple_supertrait_upcastable.rs:5:9`
`14`	`14`	`\|`
`15`	`15`	`LL \| #![warn(multiple_supertrait_upcastable)]`
`16`		`- \| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^`
	`16`	`+ \| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^`
`17`	`17`	`\|`
`18`	`18`	= note: the `multiple_supertrait_upcastable` lint is unstable
`19`	`19`	= help: add `#![feature(multiple_supertrait_upcastable)]` to the crate attributes to enable
Original file line number	Diff line number	Diff line change
`@@ -1,8 +1,8 @@`
`1`	`1`	warning: unknown lint: `fuzzy_provenance_casts`
`2`		`- --> $DIR/feature-gate-strict_provenance_lints.rs:3:1`
	`2`	`+ --> $DIR/feature-gate-strict_provenance_lints.rs:3:9`
`3`	`3`	`\|`
`4`	`4`	`LL \| #![deny(fuzzy_provenance_casts)]`
`5`		`- \| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^`
	`5`	`+ \| ^^^^^^^^^^^^^^^^^^^^^^`
`6`	`6`	`\|`
`7`	`7`	= note: the `fuzzy_provenance_casts` lint is unstable
`8`	`8`	`= note: see issue #130351 <https://github.com/rust-lang/rust/issues/130351> for more information`
`@@ -11,10 +11,10 @@ LL \| #![deny(fuzzy_provenance_casts)]`
`11`	`11`	= note: `#[warn(unknown_lints)]` on by default
`12`	`12`
`13`	`13`	warning: unknown lint: `lossy_provenance_casts`
`14`		`- --> $DIR/feature-gate-strict_provenance_lints.rs:5:1`
	`14`	`+ --> $DIR/feature-gate-strict_provenance_lints.rs:5:9`
`15`	`15`	`\|`
`16`	`16`	`LL \| #![deny(lossy_provenance_casts)]`
`17`		`- \| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^`
	`17`	`+ \| ^^^^^^^^^^^^^^^^^^^^^^`
`18`	`18`	`\|`
`19`	`19`	= note: the `lossy_provenance_casts` lint is unstable
`20`	`20`	`= note: see issue #130351 <https://github.com/rust-lang/rust/issues/130351> for more information`
Original file line number	Diff line number	Diff line change
`@@ -1,8 +1,8 @@`
`1`	`1`	warning: unknown lint: `test_unstable_lint`
`2`		`- --> $DIR/feature-gate-test_unstable_lint.rs:4:1`
	`2`	`+ --> $DIR/feature-gate-test_unstable_lint.rs:4:10`
`3`	`3`	`\|`
`4`	`4`	`LL \| #![allow(test_unstable_lint)]`
`5`		`- \| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^`
	`5`	`+ \| ^^^^^^^^^^^^^^^^^^`
`6`	`6`	`\|`
`7`	`7`	= note: the `test_unstable_lint` lint is unstable
`8`	`8`	= help: add `#![feature(test_unstable_lint)]` to the crate attributes to enable
Original file line number	Diff line number	Diff line change
`@@ -1,8 +1,8 @@`
`1`	`1`	warning: unknown lint: `unqualified_local_imports`
`2`		`- --> $DIR/feature-gate-unqualified-local-imports.rs:3:1`
	`2`	`+ --> $DIR/feature-gate-unqualified-local-imports.rs:3:10`
`3`	`3`	`\|`
`4`	`4`	`LL \| #![allow(unqualified_local_imports)]`
`5`		`- \| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^`
	`5`	`+ \| ^^^^^^^^^^^^^^^^^^^^^^^^^`
`6`	`6`	`\|`
`7`	`7`	= note: the `unqualified_local_imports` lint is unstable
`8`	`8`	= help: add `#![feature(unqualified_local_imports)]` to the crate attributes to enable
Original file line number	Diff line number	Diff line change
`@@ -1,8 +1,8 @@`
`1`	`1`	warning: unknown lint: `must_not_suspend`
`2`		`- --> $DIR/gated.rs:4:1`
	`2`	`+ --> $DIR/gated.rs:4:9`
`3`	`3`	`\|`
`4`	`4`	`LL \| #![deny(must_not_suspend)]`
`5`		`- \| ^^^^^^^^^^^^^^^^^^^^^^^^^^`
	`5`	`+ \| ^^^^^^^^^^^^^^^^`
`6`	`6`	`\|`
`7`	`7`	= note: the `must_not_suspend` lint is unstable
`8`	`8`	`= note: see issue #83310 <https://github.com/rust-lang/rust/issues/83310> for more information`
Original file line number	Diff line number	Diff line change
`@@ -1,8 +1,8 @@`
`1`	`1`	error: unknown lint: `test_unstable_lint`
`2`		`- --> $DIR/deny-unstable-lint-inline.rs:4:1`
	`2`	`+ --> $DIR/deny-unstable-lint-inline.rs:4:10`
`3`	`3`	`\|`
`4`	`4`	`LL \| #![allow(test_unstable_lint)]`
`5`		`- \| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^`
	`5`	`+ \| ^^^^^^^^^^^^^^^^^^`
`6`	`6`	`\|`
`7`	`7`	= note: the `test_unstable_lint` lint is unstable
`8`	`8`	= help: add `#![feature(test_unstable_lint)]` to the crate attributes to enable
Original file line number	Diff line number	Diff line change
`@@ -1,8 +1,8 @@`
`1`	`1`	warning: unknown lint: `test_unstable_lint`
`2`		`- --> $DIR/warn-unknown-unstable-lint-inline.rs:4:1`
	`2`	`+ --> $DIR/warn-unknown-unstable-lint-inline.rs:4:10`
`3`	`3`	`\|`
`4`	`4`	`LL \| #![allow(test_unstable_lint)]`
`5`		`- \| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^`
	`5`	`+ \| ^^^^^^^^^^^^^^^^^^`
`6`	`6`	`\|`
`7`	`7`	= note: the `test_unstable_lint` lint is unstable
`8`	`8`	= help: add `#![feature(test_unstable_lint)]` to the crate attributes to enable