Tweak wording

JohnTitor · JohnTitor · commit a9b64766a47c · 2020-07-10T07:24:18.000+09:00
diff --git a/src/librustc_resolve/late/diagnostics.rs b/src/librustc_resolve/late/diagnostics.rs
@@ -1091,7 +1091,7 @@ impl<'tcx> LifetimeContext<'_, 'tcx> {
             && suggests_in_band
         {
             err.help(
-                "if you want to use in-band lifetime bindings, \
+                "if you want to experiment with in-band lifetime bindings, \
                     add `#![feature(in_band_lifetimes)]` to the crate attributes",
             );
         }
diff --git a/src/test/ui/error-codes/E0261.stderr b/src/test/ui/error-codes/E0261.stderr
@@ -6,7 +6,7 @@ LL | fn foo(x: &'a str) { }
    |       |
    |       help: consider introducing lifetime `'a` here: `<'a>`
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 
 error[E0261]: use of undeclared lifetime name `'a`
   --> $DIR/E0261.rs:5:9
@@ -16,7 +16,7 @@ LL | struct Foo {
 LL |     x: &'a str,
    |         ^^ undeclared lifetime
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-in_band_lifetimes.stderr b/src/test/ui/feature-gates/feature-gate-in_band_lifetimes.stderr
@@ -6,7 +6,7 @@ LL | fn foo(x: &'x u8) -> &'x u8 { x }
    |       |
    |       help: consider introducing lifetime `'x` here: `<'x>`
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 
 error[E0261]: use of undeclared lifetime name `'x`
   --> $DIR/feature-gate-in_band_lifetimes.rs:3:23
@@ -16,7 +16,7 @@ LL | fn foo(x: &'x u8) -> &'x u8 { x }
    |       |
    |       help: consider introducing lifetime `'x` here: `<'x>`
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 
 error[E0261]: use of undeclared lifetime name `'b`
   --> $DIR/feature-gate-in_band_lifetimes.rs:15:12
@@ -32,7 +32,7 @@ error[E0261]: use of undeclared lifetime name `'b`
 LL |     fn inner_2(&self) -> &'b u8 {
    |                           ^^ undeclared lifetime
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 help: consider introducing lifetime `'b` here
    |
 LL | impl<'b, 'a> X<'b> {
@@ -50,15 +50,15 @@ LL | impl X<'b> {
    |     |
    |     help: consider introducing lifetime `'b` here: `<'b>`
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 
 error[E0261]: use of undeclared lifetime name `'b`
   --> $DIR/feature-gate-in_band_lifetimes.rs:25:27
    |
 LL |     fn inner_3(&self) -> &'b u8 {
    |                           ^^ undeclared lifetime
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 help: consider introducing lifetime `'b` here
    |
 LL | impl<'b> X<'b> {
@@ -76,15 +76,15 @@ LL | impl Y<&'a u8> {
    |     |
    |     help: consider introducing lifetime `'a` here: `<'a>`
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 
 error[E0261]: use of undeclared lifetime name `'a`
   --> $DIR/feature-gate-in_band_lifetimes.rs:35:25
    |
 LL |     fn inner(&self) -> &'a u8 {
    |                         ^^ undeclared lifetime
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 help: consider introducing lifetime `'a` here
    |
 LL | impl<'a> Y<&'a u8> {
@@ -100,7 +100,7 @@ error[E0261]: use of undeclared lifetime name `'b`
 LL |     fn any_lifetime() -> &'b u8;
    |                           ^^ undeclared lifetime
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 help: consider introducing lifetime `'b` here
    |
 LL | trait MyTrait<'b, 'a> {
@@ -116,7 +116,7 @@ error[E0261]: use of undeclared lifetime name `'b`
 LL |     fn borrowed_lifetime(&'b self) -> &'b u8;
    |                           ^^ undeclared lifetime
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 help: consider introducing lifetime `'b` here
    |
 LL | trait MyTrait<'b, 'a> {
@@ -132,7 +132,7 @@ error[E0261]: use of undeclared lifetime name `'b`
 LL |     fn borrowed_lifetime(&'b self) -> &'b u8;
    |                                        ^^ undeclared lifetime
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 help: consider introducing lifetime `'b` here
    |
 LL | trait MyTrait<'b, 'a> {
@@ -150,7 +150,7 @@ LL | impl MyTrait<'a> for Y<&'a u8> {
    |     |
    |     help: consider introducing lifetime `'a` here: `<'a>`
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 
 error[E0261]: use of undeclared lifetime name `'a`
   --> $DIR/feature-gate-in_band_lifetimes.rs:50:25
@@ -160,15 +160,15 @@ LL | impl MyTrait<'a> for Y<&'a u8> {
    |     |
    |     help: consider introducing lifetime `'a` here: `<'a>`
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 
 error[E0261]: use of undeclared lifetime name `'a`
   --> $DIR/feature-gate-in_band_lifetimes.rs:53:31
    |
 LL |     fn my_lifetime(&self) -> &'a u8 { self.0 }
    |                               ^^ undeclared lifetime
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 help: consider introducing lifetime `'a` here
    |
 LL | impl<'a> MyTrait<'a> for Y<&'a u8> {
@@ -184,7 +184,7 @@ error[E0261]: use of undeclared lifetime name `'b`
 LL |     fn any_lifetime() -> &'b u8 { &0 }
    |                           ^^ undeclared lifetime
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 help: consider introducing lifetime `'b` here
    |
 LL | impl<'b> MyTrait<'a> for Y<&'a u8> {
@@ -200,7 +200,7 @@ error[E0261]: use of undeclared lifetime name `'b`
 LL |     fn borrowed_lifetime(&'b self) -> &'b u8 { &*self.0 }
    |                           ^^ undeclared lifetime
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 help: consider introducing lifetime `'b` here
    |
 LL | impl<'b> MyTrait<'a> for Y<&'a u8> {
@@ -216,7 +216,7 @@ error[E0261]: use of undeclared lifetime name `'b`
 LL |     fn borrowed_lifetime(&'b self) -> &'b u8 { &*self.0 }
    |                                        ^^ undeclared lifetime
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 help: consider introducing lifetime `'b` here
    |
 LL | impl<'b> MyTrait<'a> for Y<&'a u8> {
diff --git a/src/test/ui/generic-associated-types/generic_associated_type_undeclared_lifetimes.stderr b/src/test/ui/generic-associated-types/generic_associated_type_undeclared_lifetimes.stderr
@@ -4,7 +4,7 @@ error[E0261]: use of undeclared lifetime name `'b`
 LL |         + Deref<Target = Self::Item<'b>>;
    |                                     ^^ undeclared lifetime
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 help: consider introducing lifetime `'b` here
    |
 LL | trait Iterable<'b> {
@@ -20,7 +20,7 @@ error[E0261]: use of undeclared lifetime name `'undeclared`
 LL |     fn iter<'a>(&'a self) -> Self::Iter<'undeclared>;
    |                                         ^^^^^^^^^^^ undeclared lifetime
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 help: consider introducing lifetime `'undeclared` here
    |
 LL | trait Iterable<'undeclared> {
diff --git a/src/test/ui/methods/method-call-lifetime-args-unresolved.stderr b/src/test/ui/methods/method-call-lifetime-args-unresolved.stderr
@@ -6,7 +6,7 @@ LL | fn main() {
 LL |     0.clone::<'a>();
    |               ^^ undeclared lifetime
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/regions/regions-in-enums.stderr b/src/test/ui/regions/regions-in-enums.stderr
@@ -6,7 +6,7 @@ LL | enum No0 {
 LL |     X5(&'foo usize)
    |         ^^^^ undeclared lifetime
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 
 error[E0261]: use of undeclared lifetime name `'a`
   --> $DIR/regions-in-enums.rs:17:9
@@ -16,7 +16,7 @@ LL | enum No1 {
 LL |     X6(&'a usize)
    |         ^^ undeclared lifetime
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/regions/regions-in-structs.stderr b/src/test/ui/regions/regions-in-structs.stderr
@@ -6,7 +6,7 @@ LL | struct StructDecl {
 LL |     a: &'a isize,
    |         ^^ undeclared lifetime
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 
 error[E0261]: use of undeclared lifetime name `'a`
   --> $DIR/regions-in-structs.rs:11:9
@@ -17,7 +17,7 @@ LL |     a: &'a isize,
 LL |     b: &'a isize,
    |         ^^ undeclared lifetime
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/regions/regions-name-undeclared.stderr b/src/test/ui/regions/regions-name-undeclared.stderr
@@ -4,7 +4,7 @@ error[E0261]: use of undeclared lifetime name `'b`
 LL |     fn m4(&self, arg: &'b isize) { }
    |                        ^^ undeclared lifetime
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 help: consider introducing lifetime `'b` here
    |
 LL | impl<'b, 'a> Foo<'a> {
@@ -20,7 +20,7 @@ error[E0261]: use of undeclared lifetime name `'b`
 LL |     fn m5(&'b self) { }
    |            ^^ undeclared lifetime
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 help: consider introducing lifetime `'b` here
    |
 LL | impl<'b, 'a> Foo<'a> {
@@ -36,7 +36,7 @@ error[E0261]: use of undeclared lifetime name `'b`
 LL |     fn m6(&self, arg: Foo<'b>) { }
    |                           ^^ undeclared lifetime
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 help: consider introducing lifetime `'b` here
    |
 LL | impl<'b, 'a> Foo<'a> {
@@ -54,7 +54,7 @@ LL |     type X = Option<&'a isize>;
    |           |
    |           help: consider introducing lifetime `'a` here: `<'a>`
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 
 error[E0261]: use of undeclared lifetime name `'a`
   --> $DIR/regions-name-undeclared.rs:27:13
@@ -64,7 +64,7 @@ LL |     enum E {
 LL |         E1(&'a isize)
    |             ^^ undeclared lifetime
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 
 error[E0261]: use of undeclared lifetime name `'a`
   --> $DIR/regions-name-undeclared.rs:30:13
@@ -74,7 +74,7 @@ LL |     struct S {
 LL |         f: &'a isize
    |             ^^ undeclared lifetime
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 
 error[E0261]: use of undeclared lifetime name `'a`
   --> $DIR/regions-name-undeclared.rs:32:14
@@ -84,7 +84,7 @@ LL |     fn f(a: &'a isize) { }
    |         |
    |         help: consider introducing lifetime `'a` here: `<'a>`
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 
 error[E0261]: use of undeclared lifetime name `'a`
   --> $DIR/regions-name-undeclared.rs:40:17
@@ -94,7 +94,7 @@ LL | fn fn_types(a: &'a isize,
    |            |
    |            help: consider introducing lifetime `'a` here: `<'a>`
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 
 error[E0261]: use of undeclared lifetime name `'b`
   --> $DIR/regions-name-undeclared.rs:42:36
@@ -103,7 +103,7 @@ LL | ...                   &'b isize,
    |                        ^^ undeclared lifetime
    |
    = note: for more information on higher-ranked polymorphism, visit https://doc.rust-lang.org/nomicon/hrtb.html
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 help: consider introducing lifetime `'b` here
    |
 LL | fn fn_types<'b>(a: &'a isize,
@@ -120,7 +120,7 @@ LL | ...                   &'b isize)>,
    |                        ^^ undeclared lifetime
    |
    = note: for more information on higher-ranked polymorphism, visit https://doc.rust-lang.org/nomicon/hrtb.html
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 help: consider introducing lifetime `'b` here
    |
 LL | fn fn_types<'b>(a: &'a isize,
@@ -139,7 +139,7 @@ LL | fn fn_types(a: &'a isize,
 LL |             c: &'a isize)
    |                 ^^ undeclared lifetime
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 
 error: aborting due to 11 previous errors
 
diff --git a/src/test/ui/regions/regions-undeclared.stderr b/src/test/ui/regions/regions-undeclared.stderr
@@ -12,7 +12,7 @@ LL | enum EnumDecl {
 LL |     Foo(&'a isize),
    |          ^^ undeclared lifetime
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 
 error[E0261]: use of undeclared lifetime name `'a`
   --> $DIR/regions-undeclared.rs:5:10
@@ -23,7 +23,7 @@ LL |     Foo(&'a isize),
 LL |     Bar(&'a isize),
    |          ^^ undeclared lifetime
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 
 error[E0261]: use of undeclared lifetime name `'a`
   --> $DIR/regions-undeclared.rs:8:15
@@ -33,7 +33,7 @@ LL | fn fnDecl(x: &'a isize,
    |          |
    |          help: consider introducing lifetime `'a` here: `<'a>`
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 
 error[E0261]: use of undeclared lifetime name `'a`
   --> $DIR/regions-undeclared.rs:9:15
@@ -43,7 +43,7 @@ LL | fn fnDecl(x: &'a isize,
 LL |           y: &'a isize)
    |               ^^ undeclared lifetime
    |
-   = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
+   = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
 
 error: aborting due to 5 previous errors
 
diff --git a/src/test/ui/where-clauses/where-lifetime-resolution.stderr b/src/test/ui/where-clauses/where-lifetime-resolution.stderr

Original file line number	Diff line number	Diff line change
`@@ -1091,7 +1091,7 @@ impl<'tcx> LifetimeContext<'_, 'tcx> {`
`1091`	`1091`	`&& suggests_in_band`
`1092`	`1092`	`{`
`1093`	`1093`	`err.help(`
`1094`		`- "if you want to use in-band lifetime bindings, \`
	`1094`	`+ "if you want to experiment with in-band lifetime bindings, \`
`1095`	`1095`	add `#![feature(in_band_lifetimes)]` to the crate attributes",
`1096`	`1096`	`);`
`1097`	`1097`	`}`
Original file line number	Diff line number	Diff line change
`@@ -6,7 +6,7 @@ LL \| fn foo(x: &'a str) { }`
`6`	`6`	`\| \|`
`7`	`7`	\| help: consider introducing lifetime `'a` here: `<'a>`
`8`	`8`	`\|`
`9`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`9`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`10`	`10`
`11`	`11`	error[E0261]: use of undeclared lifetime name `'a`
`12`	`12`	`--> $DIR/E0261.rs:5:9`
`@@ -16,7 +16,7 @@ LL \| struct Foo {`
`16`	`16`	`LL \| x: &'a str,`
`17`	`17`	`\| ^^ undeclared lifetime`
`18`	`18`	`\|`
`19`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`19`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`20`	`20`
`21`	`21`	`error: aborting due to 2 previous errors`
`22`	`22`
Original file line number	Diff line number	Diff line change
`@@ -6,7 +6,7 @@ LL \| fn foo(x: &'x u8) -> &'x u8 { x }`
`6`	`6`	`\| \|`
`7`	`7`	\| help: consider introducing lifetime `'x` here: `<'x>`
`8`	`8`	`\|`
`9`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`9`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`10`	`10`
`11`	`11`	error[E0261]: use of undeclared lifetime name `'x`
`12`	`12`	`--> $DIR/feature-gate-in_band_lifetimes.rs:3:23`
`@@ -16,7 +16,7 @@ LL \| fn foo(x: &'x u8) -> &'x u8 { x }`
`16`	`16`	`\| \|`
`17`	`17`	\| help: consider introducing lifetime `'x` here: `<'x>`
`18`	`18`	`\|`
`19`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`19`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`20`	`20`
`21`	`21`	error[E0261]: use of undeclared lifetime name `'b`
`22`	`22`	`--> $DIR/feature-gate-in_band_lifetimes.rs:15:12`
@@ -32,7 +32,7 @@ error[E0261]: use of undeclared lifetime name `'b`
`32`	`32`	`LL \| fn inner_2(&self) -> &'b u8 {`
`33`	`33`	`\| ^^ undeclared lifetime`
`34`	`34`	`\|`
`35`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`35`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`36`	`36`	help: consider introducing lifetime `'b` here
`37`	`37`	`\|`
`38`	`38`	`LL \| impl<'b, 'a> X<'b> {`
`@@ -50,15 +50,15 @@ LL \| impl X<'b> {`
`50`	`50`	`\| \|`
`51`	`51`	\| help: consider introducing lifetime `'b` here: `<'b>`
`52`	`52`	`\|`
`53`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`53`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`54`	`54`
`55`	`55`	error[E0261]: use of undeclared lifetime name `'b`
`56`	`56`	`--> $DIR/feature-gate-in_band_lifetimes.rs:25:27`
`57`	`57`	`\|`
`58`	`58`	`LL \| fn inner_3(&self) -> &'b u8 {`
`59`	`59`	`\| ^^ undeclared lifetime`
`60`	`60`	`\|`
`61`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`61`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`62`	`62`	help: consider introducing lifetime `'b` here
`63`	`63`	`\|`
`64`	`64`	`LL \| impl<'b> X<'b> {`
`@@ -76,15 +76,15 @@ LL \| impl Y<&'a u8> {`
`76`	`76`	`\| \|`
`77`	`77`	\| help: consider introducing lifetime `'a` here: `<'a>`
`78`	`78`	`\|`
`79`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`79`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`80`	`80`
`81`	`81`	error[E0261]: use of undeclared lifetime name `'a`
`82`	`82`	`--> $DIR/feature-gate-in_band_lifetimes.rs:35:25`
`83`	`83`	`\|`
`84`	`84`	`LL \| fn inner(&self) -> &'a u8 {`
`85`	`85`	`\| ^^ undeclared lifetime`
`86`	`86`	`\|`
`87`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`87`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`88`	`88`	help: consider introducing lifetime `'a` here
`89`	`89`	`\|`
`90`	`90`	`LL \| impl<'a> Y<&'a u8> {`
@@ -100,7 +100,7 @@ error[E0261]: use of undeclared lifetime name `'b`
`100`	`100`	`LL \| fn any_lifetime() -> &'b u8;`
`101`	`101`	`\| ^^ undeclared lifetime`
`102`	`102`	`\|`
`103`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`103`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`104`	`104`	help: consider introducing lifetime `'b` here
`105`	`105`	`\|`
`106`	`106`	`LL \| trait MyTrait<'b, 'a> {`
@@ -116,7 +116,7 @@ error[E0261]: use of undeclared lifetime name `'b`
`116`	`116`	`LL \| fn borrowed_lifetime(&'b self) -> &'b u8;`
`117`	`117`	`\| ^^ undeclared lifetime`
`118`	`118`	`\|`
`119`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`119`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`120`	`120`	help: consider introducing lifetime `'b` here
`121`	`121`	`\|`
`122`	`122`	`LL \| trait MyTrait<'b, 'a> {`
@@ -132,7 +132,7 @@ error[E0261]: use of undeclared lifetime name `'b`
`132`	`132`	`LL \| fn borrowed_lifetime(&'b self) -> &'b u8;`
`133`	`133`	`\| ^^ undeclared lifetime`
`134`	`134`	`\|`
`135`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`135`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`136`	`136`	help: consider introducing lifetime `'b` here
`137`	`137`	`\|`
`138`	`138`	`LL \| trait MyTrait<'b, 'a> {`
`@@ -150,7 +150,7 @@ LL \| impl MyTrait<'a> for Y<&'a u8> {`
`150`	`150`	`\| \|`
`151`	`151`	\| help: consider introducing lifetime `'a` here: `<'a>`
`152`	`152`	`\|`
`153`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`153`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`154`	`154`
`155`	`155`	error[E0261]: use of undeclared lifetime name `'a`
`156`	`156`	`--> $DIR/feature-gate-in_band_lifetimes.rs:50:25`
`@@ -160,15 +160,15 @@ LL \| impl MyTrait<'a> for Y<&'a u8> {`
`160`	`160`	`\| \|`
`161`	`161`	\| help: consider introducing lifetime `'a` here: `<'a>`
`162`	`162`	`\|`
`163`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`163`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`164`	`164`
`165`	`165`	error[E0261]: use of undeclared lifetime name `'a`
`166`	`166`	`--> $DIR/feature-gate-in_band_lifetimes.rs:53:31`
`167`	`167`	`\|`
`168`	`168`	`LL \| fn my_lifetime(&self) -> &'a u8 { self.0 }`
`169`	`169`	`\| ^^ undeclared lifetime`
`170`	`170`	`\|`
`171`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`171`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`172`	`172`	help: consider introducing lifetime `'a` here
`173`	`173`	`\|`
`174`	`174`	`LL \| impl<'a> MyTrait<'a> for Y<&'a u8> {`
@@ -184,7 +184,7 @@ error[E0261]: use of undeclared lifetime name `'b`
`184`	`184`	`LL \| fn any_lifetime() -> &'b u8 { &0 }`
`185`	`185`	`\| ^^ undeclared lifetime`
`186`	`186`	`\|`
`187`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`187`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`188`	`188`	help: consider introducing lifetime `'b` here
`189`	`189`	`\|`
`190`	`190`	`LL \| impl<'b> MyTrait<'a> for Y<&'a u8> {`
@@ -200,7 +200,7 @@ error[E0261]: use of undeclared lifetime name `'b`
`200`	`200`	`LL \| fn borrowed_lifetime(&'b self) -> &'b u8 { &*self.0 }`
`201`	`201`	`\| ^^ undeclared lifetime`
`202`	`202`	`\|`
`203`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`203`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`204`	`204`	help: consider introducing lifetime `'b` here
`205`	`205`	`\|`
`206`	`206`	`LL \| impl<'b> MyTrait<'a> for Y<&'a u8> {`
@@ -216,7 +216,7 @@ error[E0261]: use of undeclared lifetime name `'b`
`216`	`216`	`LL \| fn borrowed_lifetime(&'b self) -> &'b u8 { &*self.0 }`
`217`	`217`	`\| ^^ undeclared lifetime`
`218`	`218`	`\|`
`219`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`219`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`220`	`220`	help: consider introducing lifetime `'b` here
`221`	`221`	`\|`
`222`	`222`	`LL \| impl<'b> MyTrait<'a> for Y<&'a u8> {`
Original file line number	Diff line number	Diff line change
@@ -4,7 +4,7 @@ error[E0261]: use of undeclared lifetime name `'b`
`4`	`4`	`LL \| + Deref<Target = Self::Item<'b>>;`
`5`	`5`	`\| ^^ undeclared lifetime`
`6`	`6`	`\|`
`7`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`7`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`8`	`8`	help: consider introducing lifetime `'b` here
`9`	`9`	`\|`
`10`	`10`	`LL \| trait Iterable<'b> {`
@@ -20,7 +20,7 @@ error[E0261]: use of undeclared lifetime name `'undeclared`
`20`	`20`	`LL \| fn iter<'a>(&'a self) -> Self::Iter<'undeclared>;`
`21`	`21`	`\| ^^^^^^^^^^^ undeclared lifetime`
`22`	`22`	`\|`
`23`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`23`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`24`	`24`	help: consider introducing lifetime `'undeclared` here
`25`	`25`	`\|`
`26`	`26`	`LL \| trait Iterable<'undeclared> {`
Original file line number	Diff line number	Diff line change
`@@ -6,7 +6,7 @@ LL \| fn main() {`
`6`	`6`	`LL \| 0.clone::<'a>();`
`7`	`7`	`\| ^^ undeclared lifetime`
`8`	`8`	`\|`
`9`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`9`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`10`	`10`
`11`	`11`	`error: aborting due to previous error`
`12`	`12`
Original file line number	Diff line number	Diff line change
`@@ -6,7 +6,7 @@ LL \| enum No0 {`
`6`	`6`	`LL \| X5(&'foo usize)`
`7`	`7`	`\| ^^^^ undeclared lifetime`
`8`	`8`	`\|`
`9`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`9`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`10`	`10`
`11`	`11`	error[E0261]: use of undeclared lifetime name `'a`
`12`	`12`	`--> $DIR/regions-in-enums.rs:17:9`
`@@ -16,7 +16,7 @@ LL \| enum No1 {`
`16`	`16`	`LL \| X6(&'a usize)`
`17`	`17`	`\| ^^ undeclared lifetime`
`18`	`18`	`\|`
`19`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`19`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`20`	`20`
`21`	`21`	`error: aborting due to 2 previous errors`
`22`	`22`
Original file line number	Diff line number	Diff line change
`@@ -6,7 +6,7 @@ LL \| struct StructDecl {`
`6`	`6`	`LL \| a: &'a isize,`
`7`	`7`	`\| ^^ undeclared lifetime`
`8`	`8`	`\|`
`9`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`9`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`10`	`10`
`11`	`11`	error[E0261]: use of undeclared lifetime name `'a`
`12`	`12`	`--> $DIR/regions-in-structs.rs:11:9`
`@@ -17,7 +17,7 @@ LL \| a: &'a isize,`
`17`	`17`	`LL \| b: &'a isize,`
`18`	`18`	`\| ^^ undeclared lifetime`
`19`	`19`	`\|`
`20`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`20`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`21`	`21`
`22`	`22`	`error: aborting due to 2 previous errors`
`23`	`23`
Original file line number	Diff line number	Diff line change
@@ -4,7 +4,7 @@ error[E0261]: use of undeclared lifetime name `'b`
`4`	`4`	`LL \| fn m4(&self, arg: &'b isize) { }`
`5`	`5`	`\| ^^ undeclared lifetime`
`6`	`6`	`\|`
`7`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`7`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`8`	`8`	help: consider introducing lifetime `'b` here
`9`	`9`	`\|`
`10`	`10`	`LL \| impl<'b, 'a> Foo<'a> {`
@@ -20,7 +20,7 @@ error[E0261]: use of undeclared lifetime name `'b`
`20`	`20`	`LL \| fn m5(&'b self) { }`
`21`	`21`	`\| ^^ undeclared lifetime`
`22`	`22`	`\|`
`23`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`23`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`24`	`24`	help: consider introducing lifetime `'b` here
`25`	`25`	`\|`
`26`	`26`	`LL \| impl<'b, 'a> Foo<'a> {`
@@ -36,7 +36,7 @@ error[E0261]: use of undeclared lifetime name `'b`
`36`	`36`	`LL \| fn m6(&self, arg: Foo<'b>) { }`
`37`	`37`	`\| ^^ undeclared lifetime`
`38`	`38`	`\|`
`39`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`39`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`40`	`40`	help: consider introducing lifetime `'b` here
`41`	`41`	`\|`
`42`	`42`	`LL \| impl<'b, 'a> Foo<'a> {`
`@@ -54,7 +54,7 @@ LL \| type X = Option<&'a isize>;`
`54`	`54`	`\| \|`
`55`	`55`	\| help: consider introducing lifetime `'a` here: `<'a>`
`56`	`56`	`\|`
`57`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`57`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`58`	`58`
`59`	`59`	error[E0261]: use of undeclared lifetime name `'a`
`60`	`60`	`--> $DIR/regions-name-undeclared.rs:27:13`
`@@ -64,7 +64,7 @@ LL \| enum E {`
`64`	`64`	`LL \| E1(&'a isize)`
`65`	`65`	`\| ^^ undeclared lifetime`
`66`	`66`	`\|`
`67`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`67`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`68`	`68`
`69`	`69`	error[E0261]: use of undeclared lifetime name `'a`
`70`	`70`	`--> $DIR/regions-name-undeclared.rs:30:13`
`@@ -74,7 +74,7 @@ LL \| struct S {`
`74`	`74`	`LL \| f: &'a isize`
`75`	`75`	`\| ^^ undeclared lifetime`
`76`	`76`	`\|`
`77`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`77`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`78`	`78`
`79`	`79`	error[E0261]: use of undeclared lifetime name `'a`
`80`	`80`	`--> $DIR/regions-name-undeclared.rs:32:14`
`@@ -84,7 +84,7 @@ LL \| fn f(a: &'a isize) { }`
`84`	`84`	`\| \|`
`85`	`85`	\| help: consider introducing lifetime `'a` here: `<'a>`
`86`	`86`	`\|`
`87`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`87`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`88`	`88`
`89`	`89`	error[E0261]: use of undeclared lifetime name `'a`
`90`	`90`	`--> $DIR/regions-name-undeclared.rs:40:17`
`@@ -94,7 +94,7 @@ LL \| fn fn_types(a: &'a isize,`
`94`	`94`	`\| \|`
`95`	`95`	\| help: consider introducing lifetime `'a` here: `<'a>`
`96`	`96`	`\|`
`97`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`97`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`98`	`98`
`99`	`99`	error[E0261]: use of undeclared lifetime name `'b`
`100`	`100`	`--> $DIR/regions-name-undeclared.rs:42:36`
`@@ -103,7 +103,7 @@ LL \| ... &'b isize,`
`103`	`103`	`\| ^^ undeclared lifetime`
`104`	`104`	`\|`
`105`	`105`	`= note: for more information on higher-ranked polymorphism, visit https://doc.rust-lang.org/nomicon/hrtb.html`
`106`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`106`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`107`	`107`	help: consider introducing lifetime `'b` here
`108`	`108`	`\|`
`109`	`109`	`LL \| fn fn_types<'b>(a: &'a isize,`
`@@ -120,7 +120,7 @@ LL \| ... &'b isize)>,`
`120`	`120`	`\| ^^ undeclared lifetime`
`121`	`121`	`\|`
`122`	`122`	`= note: for more information on higher-ranked polymorphism, visit https://doc.rust-lang.org/nomicon/hrtb.html`
`123`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`123`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`124`	`124`	help: consider introducing lifetime `'b` here
`125`	`125`	`\|`
`126`	`126`	`LL \| fn fn_types<'b>(a: &'a isize,`
`@@ -139,7 +139,7 @@ LL \| fn fn_types(a: &'a isize,`
`139`	`139`	`LL \| c: &'a isize)`
`140`	`140`	`\| ^^ undeclared lifetime`
`141`	`141`	`\|`
`142`		- = help: if you want to use in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
	`142`	+ = help: if you want to experiment with in-band lifetime bindings, add `#![feature(in_band_lifetimes)]` to the crate attributes
`143`	`143`
`144`	`144`	`error: aborting due to 11 previous errors`
`145`	`145`