[beta] Fix naming conventions for new lints

26 files changed, 54 insertions, 49 deletions

diff --git a/src/doc/rustc/src/lints/listing/allowed-by-default.md b/src/doc/rustc/src/lints/listing/allowed-by-default.md
index e1a3f96a6fe..7768b41f85e 100644
--- a/src/doc/rustc/src/lints/listing/allowed-by-default.md
+++ b/src/doc/rustc/src/lints/listing/allowed-by-default.md
@@ -64,7 +64,7 @@ To fix it, do as the help message suggests:
 
 ```rust
 #![feature(dyn_trait)]
-#![deny(bare_trait_object)]
+#![deny(bare_trait_objects)]
 
 trait Trait { }
 
diff --git a/src/librustc/hir/lowering.rs b/src/librustc/hir/lowering.rs
index 51f0c1d7047..25eaff89d55 100644
--- a/src/librustc/hir/lowering.rs
+++ b/src/librustc/hir/lowering.rs
@@ -4122,7 +4122,7 @@ impl<'a> LoweringContext<'a> {
 
     fn maybe_lint_bare_trait(&self, span: Span, id: NodeId, is_global: bool) {
         self.sess.buffer_lint_with_diagnostic(
-            builtin::BARE_TRAIT_OBJECT,
+            builtin::BARE_TRAIT_OBJECTS,
             id,
             span,
             "trait objects without an explicit `dyn` are deprecated",
diff --git a/src/librustc/lint/builtin.rs b/src/librustc/lint/builtin.rs
index 175b44991fd..2ec31cca81c 100644
--- a/src/librustc/lint/builtin.rs
+++ b/src/librustc/lint/builtin.rs
@@ -231,7 +231,7 @@ declare_lint! {
 }
 
 declare_lint! {
-    pub SINGLE_USE_LIFETIME,
+    pub SINGLE_USE_LIFETIMES,
     Allow,
    "detects single use lifetimes"
 }
@@ -243,19 +243,19 @@ declare_lint! {
 }
 
 declare_lint! {
-    pub ELIDED_LIFETIME_IN_PATH,
+    pub ELIDED_LIFETIMES_IN_PATHS,
     Allow,
     "hidden lifetime parameters are deprecated, try `Foo<'_>`"
 }
 
 declare_lint! {
-    pub BARE_TRAIT_OBJECT,
+    pub BARE_TRAIT_OBJECTS,
     Allow,
     "suggest using `dyn Trait` for trait objects"
 }
 
 declare_lint! {
-    pub ABSOLUTE_PATH_STARTING_WITH_MODULE,
+    pub ABSOLUTE_PATHS_NOT_STARTING_WITH_CRATE,
     Allow,
     "fully qualified paths that start with a module name \
      instead of `crate`, `self`, or an extern crate name"
@@ -268,7 +268,7 @@ declare_lint! {
 }
 
 declare_lint! {
-    pub UNSTABLE_NAME_COLLISION,
+    pub UNSTABLE_NAME_COLLISIONS,
     Warn,
     "detects name collision with an existing but unstable method"
 }
@@ -317,12 +317,12 @@ impl LintPass for HardwiredLints {
             DEPRECATED,
             UNUSED_UNSAFE,
             UNUSED_MUT,
-            SINGLE_USE_LIFETIME,
+            SINGLE_USE_LIFETIMES,
             TYVAR_BEHIND_RAW_POINTER,
-            ELIDED_LIFETIME_IN_PATH,
-            BARE_TRAIT_OBJECT,
-            ABSOLUTE_PATH_STARTING_WITH_MODULE,
-            UNSTABLE_NAME_COLLISION,
+            ELIDED_LIFETIMES_IN_PATHS,
+            BARE_TRAIT_OBJECTS,
+            ABSOLUTE_PATHS_NOT_STARTING_WITH_CRATE,
+            UNSTABLE_NAME_COLLISIONS,
         )
     }
 }
diff --git a/src/librustc/lint/mod.rs b/src/librustc/lint/mod.rs
index d6c6f9dc0f6..ea5c990d5f9 100644
--- a/src/librustc/lint/mod.rs
+++ b/src/librustc/lint/mod.rs
@@ -505,7 +505,7 @@ pub fn struct_lint_level<'a>(sess: &'a Session,
             "this was previously accepted by the compiler but is being phased out; \
              it will become a hard error";
 
-        let explanation = if lint_id == LintId::of(::lint::builtin::UNSTABLE_NAME_COLLISION) {
+        let explanation = if lint_id == LintId::of(::lint::builtin::UNSTABLE_NAME_COLLISIONS) {
             "once this method is added to the standard library, \
              the ambiguity may cause an error or change in behavior!"
                 .to_owned()
diff --git a/src/librustc/middle/resolve_lifetime.rs b/src/librustc/middle/resolve_lifetime.rs
index ceda72dcd7a..a4b1dd77bbb 100644
--- a/src/librustc/middle/resolve_lifetime.rs
+++ b/src/librustc/middle/resolve_lifetime.rs
@@ -1290,7 +1290,7 @@ impl<'a, 'tcx> LifetimeContext<'a, 'tcx> {
 
                         this.tcx
                             .struct_span_lint_node(
-                                lint::builtin::SINGLE_USE_LIFETIME,
+                                lint::builtin::SINGLE_USE_LIFETIMES,
                                 id,
                                 span,
                                 &format!(
@@ -1901,7 +1901,7 @@ impl<'a, 'tcx> LifetimeContext<'a, 'tcx> {
         if deprecated {
             self.tcx
                 .struct_span_lint_node(
-                    lint::builtin::ELIDED_LIFETIME_IN_PATH,
+                    lint::builtin::ELIDED_LIFETIMES_IN_PATHS,
                     id,
                     span,
                     &format!("hidden lifetime parameters are deprecated, try `Foo<'_>`"),
diff --git a/src/librustc_lint/builtin.rs b/src/librustc_lint/builtin.rs
index 817abe2ceeb..cf6406800e1 100644
--- a/src/librustc_lint/builtin.rs
+++ b/src/librustc_lint/builtin.rs
@@ -694,7 +694,7 @@ impl EarlyLintPass for DeprecatedAttr {
 }
 
 declare_lint! {
-    pub UNUSED_DOC_COMMENT,
+    pub UNUSED_DOC_COMMENTS,
     Warn,
     "detects doc comments that aren't used by rustdoc"
 }
@@ -704,7 +704,7 @@ pub struct UnusedDocComment;
 
 impl LintPass for UnusedDocComment {
     fn get_lints(&self) -> LintArray {
-        lint_array![UNUSED_DOC_COMMENT]
+        lint_array![UNUSED_DOC_COMMENTS]
     }
 }
 
@@ -713,7 +713,7 @@ impl UnusedDocComment {
                    I: Iterator<Item=&'a ast::Attribute>,
                    C: LintContext<'tcx>>(&self, mut attrs: I, cx: &C) {
         if let Some(attr) = attrs.find(|a| a.is_value_str() && a.check_name("doc")) {
-            cx.struct_span_lint(UNUSED_DOC_COMMENT, attr.span, "doc comment not used by rustdoc")
+            cx.struct_span_lint(UNUSED_DOC_COMMENTS, attr.span, "doc comment not used by rustdoc")
               .emit();
         }
     }
diff --git a/src/librustc_lint/lib.rs b/src/librustc_lint/lib.rs
index 074fa914f37..559c2459876 100644
--- a/src/librustc_lint/lib.rs
+++ b/src/librustc_lint/lib.rs
@@ -40,7 +40,7 @@ extern crate rustc_target;
 extern crate syntax_pos;
 
 use rustc::lint;
-use rustc::lint::builtin::{BARE_TRAIT_OBJECT, ABSOLUTE_PATH_STARTING_WITH_MODULE};
+use rustc::lint::builtin::{BARE_TRAIT_OBJECTS, ABSOLUTE_PATHS_NOT_STARTING_WITH_CRATE};
 use rustc::session;
 use rustc::util;
 
@@ -172,14 +172,14 @@ pub fn register_builtins(store: &mut lint::LintStore, sess: Option<&Session>) {
                     UNUSED_ATTRIBUTES,
                     UNUSED_MACROS,
                     UNUSED_ALLOCATION,
-                    UNUSED_DOC_COMMENT,
+                    UNUSED_DOC_COMMENTS,
                     UNUSED_EXTERN_CRATES,
                     UNUSED_FEATURES,
                     UNUSED_PARENS);
 
     add_lint_group!(sess,
                     "rust_2018_migration",
-                    BARE_TRAIT_OBJECT,
+                    BARE_TRAIT_OBJECTS,
                     UNREACHABLE_PUB);
 
     // Guidelines for creating a future incompatibility lint:
@@ -273,20 +273,25 @@ pub fn register_builtins(store: &mut lint::LintStore, sess: Option<&Session>) {
             edition: Some(Edition::Edition2018),
         },
         FutureIncompatibleInfo {
-            id: LintId::of(UNSTABLE_NAME_COLLISION),
+            id: LintId::of(UNSTABLE_NAME_COLLISIONS),
             reference: "issue #48919 <https://github.com/rust-lang/rust/issues/48919>",
             edition: None,
             // Note: this item represents future incompatibility of all unstable functions in the
             //       standard library, and thus should never be removed or changed to an error.
         },
         FutureIncompatibleInfo {
-            id: LintId::of(ABSOLUTE_PATH_STARTING_WITH_MODULE),
+            id: LintId::of(ABSOLUTE_PATHS_NOT_STARTING_WITH_CRATE),
             reference: "issue TBD",
             edition: Some(Edition::Edition2018),
         },
         ]);
 
     // Register renamed and removed lints
+    store.register_renamed("single_use_lifetime", "single_use_lifetimes");
+    store.register_renamed("elided_lifetime_in_path", "elided_lifetimes_in_paths");
+    store.register_renamed("bare_trait_object", "bare_trait_objects");
+    store.register_renamed("unstable_name_collision", "unstable_name_collisions");
+    store.register_renamed("unused_doc_comment", "unused_doc_comments");
     store.register_renamed("unknown_features", "unused_features");
     store.register_removed("unsigned_negation", "replaced by negate_unsigned feature gate");
     store.register_removed("negate_unsigned", "cast a signed value instead");
diff --git a/src/librustc_resolve/lib.rs b/src/librustc_resolve/lib.rs
index 0f931d4374e..cf0df30b93d 100644
--- a/src/librustc_resolve/lib.rs
+++ b/src/librustc_resolve/lib.rs
@@ -3367,7 +3367,7 @@ impl<'a> Resolver<'a> {
                                     let diag = lint::builtin::BuiltinLintDiagnostics
                                                    ::AbsPathWithModule(path_span);
                                     self.session.buffer_lint_with_diagnostic(
-                                        lint::builtin::ABSOLUTE_PATH_STARTING_WITH_MODULE,
+                                        lint::builtin::ABSOLUTE_PATHS_NOT_STARTING_WITH_CRATE,
                                         id, path_span,
                                         "Absolute paths must start with `self`, `super`, \
                                         `crate`, or an external crate name in the 2018 edition",
diff --git a/src/librustc_typeck/check/method/probe.rs b/src/librustc_typeck/check/method/probe.rs
index 907c80f0daf..ecaa1dad033 100644
--- a/src/librustc_typeck/check/method/probe.rs
+++ b/src/librustc_typeck/check/method/probe.rs
@@ -1056,7 +1056,7 @@ impl<'a, 'gcx, 'tcx> ProbeContext<'a, 'gcx, 'tcx> {
         unstable_candidates: &[(&Candidate<'tcx>, Symbol)],
     ) {
         let mut diag = self.tcx.struct_span_lint_node(
-            lint::builtin::UNSTABLE_NAME_COLLISION,
+            lint::builtin::UNSTABLE_NAME_COLLISIONS,
             self.fcx.body_id,
             self.span,
             "a method with this name may be added to the standard library in the future",
diff --git a/src/test/compile-fail/trait-bounds-not-on-struct.rs b/src/test/compile-fail/trait-bounds-not-on-struct.rs
index 1b1a238a941..76bbca60658 100644
--- a/src/test/compile-fail/trait-bounds-not-on-struct.rs
+++ b/src/test/compile-fail/trait-bounds-not-on-struct.rs
@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![allow(bare_trait_object)]
+#![allow(bare_trait_objects)]
 
 struct Foo;
 
diff --git a/src/test/compile-fail/useless_comment.rs b/src/test/compile-fail/useless_comment.rs
index 90eb66728fc..645514971da 100644
--- a/src/test/compile-fail/useless_comment.rs
+++ b/src/test/compile-fail/useless_comment.rs
@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![deny(unused_doc_comment)]
+#![deny(unused_doc_comments)]
 
 fn foo() {
     /// a //~ ERROR doc comment not used by rustdoc
diff --git a/src/test/ui/edition-lint-paths.rs b/src/test/ui/edition-lint-paths.rs
index 0b49e72ccd9..8164a862a18 100644
--- a/src/test/ui/edition-lint-paths.rs
+++ b/src/test/ui/edition-lint-paths.rs
@@ -9,7 +9,7 @@
 // except according to those terms.
 
 #![feature(crate_in_paths)]
-#![deny(absolute_path_starting_with_module)]
+#![deny(absolute_paths_not_starting_with_crate)]
 #![allow(unused)]
 
 pub mod foo {
diff --git a/src/test/ui/edition-lint-paths.stderr b/src/test/ui/edition-lint-paths.stderr
index 509527e0374..fca6edfc055 100644
--- a/src/test/ui/edition-lint-paths.stderr
+++ b/src/test/ui/edition-lint-paths.stderr
@@ -7,8 +7,8 @@ LL |     use ::bar::Bar;
 note: lint level defined here
   --> $DIR/edition-lint-paths.rs:12:9
    |
-LL | #![deny(absolute_path_starting_with_module)]
-   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+LL | #![deny(absolute_paths_not_starting_with_crate)]
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2018 edition!
    = note: for more information, see issue TBD
 
diff --git a/src/test/ui/in-band-lifetimes/ellided-lifetimes.rs b/src/test/ui/in-band-lifetimes/ellided-lifetimes.rs
index 5151abd6823..3739ffe6a26 100644
--- a/src/test/ui/in-band-lifetimes/ellided-lifetimes.rs
+++ b/src/test/ui/in-band-lifetimes/ellided-lifetimes.rs
@@ -9,7 +9,7 @@
 // except according to those terms.
 #![allow(warnings)]
 #![allow(unused_variables, dead_code, unused, bad_style)]
-#![deny(elided_lifetime_in_path)]
+#![deny(elided_lifetimes_in_paths)]
 
 struct Foo<'a> { x: &'a u32 }
 fn foo(x: &Foo) {
diff --git a/src/test/ui/in-band-lifetimes/ellided-lifetimes.stderr b/src/test/ui/in-band-lifetimes/ellided-lifetimes.stderr
index ba58ca1ed95..c2bd2c261ac 100644
--- a/src/test/ui/in-band-lifetimes/ellided-lifetimes.stderr
+++ b/src/test/ui/in-band-lifetimes/ellided-lifetimes.stderr
@@ -7,8 +7,8 @@ LL | fn foo(x: &Foo) {
 note: lint level defined here
   --> $DIR/ellided-lifetimes.rs:12:9
    |
-LL | #![deny(elided_lifetime_in_path)]
-   |         ^^^^^^^^^^^^^^^^^^^^^^^
+LL | #![deny(elided_lifetimes_in_paths)]
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/in-band-lifetimes/single_use_lifetimes-2.rs b/src/test/ui/in-band-lifetimes/single_use_lifetimes-2.rs
index 005f1f033b6..6aa95bc3ee5 100644
--- a/src/test/ui/in-band-lifetimes/single_use_lifetimes-2.rs
+++ b/src/test/ui/in-band-lifetimes/single_use_lifetimes-2.rs
@@ -7,7 +7,7 @@
 // <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.
-#![deny(single_use_lifetime)]
+#![deny(single_use_lifetimes)]
 // FIXME(#44752) -- this scenario should not be warned
 fn deref<'x>() -> &'x u32 { //~ ERROR lifetime name `'x` only used once
     22
diff --git a/src/test/ui/in-band-lifetimes/single_use_lifetimes-2.stderr b/src/test/ui/in-band-lifetimes/single_use_lifetimes-2.stderr
index 38d05369fb8..33d35de9356 100644
--- a/src/test/ui/in-band-lifetimes/single_use_lifetimes-2.stderr
+++ b/src/test/ui/in-band-lifetimes/single_use_lifetimes-2.stderr
@@ -7,8 +7,8 @@ LL | fn deref<'x>() -> &'x u32 { //~ ERROR lifetime name `'x` only used once
 note: lint level defined here
   --> $DIR/single_use_lifetimes-2.rs:10:9
    |
-LL | #![deny(single_use_lifetime)]
-   |         ^^^^^^^^^^^^^^^^^^^
+LL | #![deny(single_use_lifetimes)]
+   |         ^^^^^^^^^^^^^^^^^^^^
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/in-band-lifetimes/single_use_lifetimes-3.rs b/src/test/ui/in-band-lifetimes/single_use_lifetimes-3.rs
index 263548ca7f4..1855ec7b5ac 100644
--- a/src/test/ui/in-band-lifetimes/single_use_lifetimes-3.rs
+++ b/src/test/ui/in-band-lifetimes/single_use_lifetimes-3.rs
@@ -7,7 +7,7 @@
 // <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.
-#![deny(single_use_lifetime)]
+#![deny(single_use_lifetimes)]
 struct Foo<'x> { //~ ERROR lifetime name `'x` only used once
     x: &'x u32 // no warning!
 }
diff --git a/src/test/ui/in-band-lifetimes/single_use_lifetimes-3.stderr b/src/test/ui/in-band-lifetimes/single_use_lifetimes-3.stderr
index 49c06aafbe5..8226f2fdffd 100644
--- a/src/test/ui/in-band-lifetimes/single_use_lifetimes-3.stderr
+++ b/src/test/ui/in-band-lifetimes/single_use_lifetimes-3.stderr
@@ -7,8 +7,8 @@ LL | struct Foo<'x> { //~ ERROR lifetime name `'x` only used once
 note: lint level defined here
   --> $DIR/single_use_lifetimes-3.rs:10:9
    |
-LL | #![deny(single_use_lifetime)]
-   |         ^^^^^^^^^^^^^^^^^^^
+LL | #![deny(single_use_lifetimes)]
+   |         ^^^^^^^^^^^^^^^^^^^^
 
 error: lifetime name `'y` only used once
   --> $DIR/single_use_lifetimes-3.rs:16:6
diff --git a/src/test/ui/in-band-lifetimes/single_use_lifetimes-4.rs b/src/test/ui/in-band-lifetimes/single_use_lifetimes-4.rs
index 4ac8f8c0d4e..97982ff53b5 100644
--- a/src/test/ui/in-band-lifetimes/single_use_lifetimes-4.rs
+++ b/src/test/ui/in-band-lifetimes/single_use_lifetimes-4.rs
@@ -7,7 +7,7 @@
 // <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.
-#![deny(single_use_lifetime)]
+#![deny(single_use_lifetimes)]
  // Neither should issue a warning, as explicit lifetimes are mandatory in this case
 struct Foo<'x> { //~ ERROR lifetime name `'x` only used once
     x: &'x u32
diff --git a/src/test/ui/in-band-lifetimes/single_use_lifetimes-4.stderr b/src/test/ui/in-band-lifetimes/single_use_lifetimes-4.stderr
index 2df370f5d02..fbe6f2d1867 100644
--- a/src/test/ui/in-band-lifetimes/single_use_lifetimes-4.stderr
+++ b/src/test/ui/in-band-lifetimes/single_use_lifetimes-4.stderr
@@ -7,8 +7,8 @@ LL | struct Foo<'x> { //~ ERROR lifetime name `'x` only used once
 note: lint level defined here
   --> $DIR/single_use_lifetimes-4.rs:10:9
    |
-LL | #![deny(single_use_lifetime)]
-   |         ^^^^^^^^^^^^^^^^^^^
+LL | #![deny(single_use_lifetimes)]
+   |         ^^^^^^^^^^^^^^^^^^^^
 
 error: lifetime name `'x` only used once
   --> $DIR/single_use_lifetimes-4.rs:16:10
diff --git a/src/test/ui/in-band-lifetimes/single_use_lifetimes-5.rs b/src/test/ui/in-band-lifetimes/single_use_lifetimes-5.rs
index cef904c4896..e9f3cb9a137 100644
--- a/src/test/ui/in-band-lifetimes/single_use_lifetimes-5.rs
+++ b/src/test/ui/in-band-lifetimes/single_use_lifetimes-5.rs
@@ -7,7 +7,7 @@
 // <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.
-#![deny(single_use_lifetime)]
+#![deny(single_use_lifetimes)]
 // Should not issue a warning, as explicit lifetimes are mandatory in this case:
 trait Foo<'x> { //~ ERROR lifetime name `'x` only used once
     fn foo(&self, arg: &'x u32);
diff --git a/src/test/ui/in-band-lifetimes/single_use_lifetimes-5.stderr b/src/test/ui/in-band-lifetimes/single_use_lifetimes-5.stderr
index eec426e4e63..bb96fd26006 100644
--- a/src/test/ui/in-band-lifetimes/single_use_lifetimes-5.stderr
+++ b/src/test/ui/in-band-lifetimes/single_use_lifetimes-5.stderr
@@ -7,8 +7,8 @@ LL | trait Foo<'x> { //~ ERROR lifetime name `'x` only used once
 note: lint level defined here
   --> $DIR/single_use_lifetimes-5.rs:10:9
    |
-LL | #![deny(single_use_lifetime)]
-   |         ^^^^^^^^^^^^^^^^^^^
+LL | #![deny(single_use_lifetimes)]
+   |         ^^^^^^^^^^^^^^^^^^^^
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/in-band-lifetimes/single_use_lifetimes.rs b/src/test/ui/in-band-lifetimes/single_use_lifetimes.rs
index a97056b6240..af3457523ca 100644
--- a/src/test/ui/in-band-lifetimes/single_use_lifetimes.rs
+++ b/src/test/ui/in-band-lifetimes/single_use_lifetimes.rs
@@ -7,7 +7,7 @@
 // <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.
-#![deny(single_use_lifetime)]
+#![deny(single_use_lifetimes)]
 
 fn deref<'x>(v: &'x u32) -> u32 { //~ ERROR lifetime name `'x` only used once
     *v
diff --git a/src/test/ui/in-band-lifetimes/single_use_lifetimes.stderr b/src/test/ui/in-band-lifetimes/single_use_lifetimes.stderr
index 15917d3c085..a96f5c5c4e7 100644
--- a/src/test/ui/in-band-lifetimes/single_use_lifetimes.stderr
+++ b/src/test/ui/in-band-lifetimes/single_use_lifetimes.stderr
@@ -7,8 +7,8 @@ LL | fn deref<'x>(v: &'x u32) -> u32 { //~ ERROR lifetime name `'x` only used on
 note: lint level defined here
   --> $DIR/single_use_lifetimes.rs:10:9
    |
-LL | #![deny(single_use_lifetime)]
-   |         ^^^^^^^^^^^^^^^^^^^
+LL | #![deny(single_use_lifetimes)]
+   |         ^^^^^^^^^^^^^^^^^^^^
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/inference_unstable.stderr b/src/test/ui/inference_unstable.stderr
index a217bc57b36..3a5cb6f2b2e 100644
--- a/src/test/ui/inference_unstable.stderr
+++ b/src/test/ui/inference_unstable.stderr
@@ -4,7 +4,7 @@ warning: a method with this name may be added to the standard library in the fut
 LL |     assert_eq!('x'.ipu_flatten(), 1);
    |                    ^^^^^^^^^^^
    |
-   = note: #[warn(unstable_name_collision)] on by default
+   = note: #[warn(unstable_name_collisions)] on by default
    = warning: once this method is added to the standard library, the ambiguity may cause an error or change in behavior!
    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
    = help: call with fully qualified syntax `inference_unstable_itertools::IpuItertools::ipu_flatten(...)` to keep using the current method