Address review comments + Update NLL tests

src/test/ui/deduplicate-diagnostics-2.deduplicate.stderr

@@ -0,0 +1,28 @@
+warning: floating-point types cannot be used in patterns
+  --> $DIR/deduplicate-diagnostics-2.rs:7:9
+   |
+LL |         1.0 => {}
+   |         ^^^
+   |
+   = note: `#[warn(illegal_floating_point_literal_pattern)]` on by default
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #41620 <https://github.com/rust-lang/rust/issues/41620>
+
+warning: floating-point types cannot be used in patterns
+  --> $DIR/deduplicate-diagnostics-2.rs:11:9
+   |
+LL |         2.0 => {}
+   |         ^^^
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #41620 <https://github.com/rust-lang/rust/issues/41620>
+
+warning: floating-point types cannot be used in patterns
+  --> $DIR/deduplicate-diagnostics-2.rs:7:9
+   |
+LL |         1.0 => {}
+   |         ^^^
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #41620 <https://github.com/rust-lang/rust/issues/41620>
+

src/test/ui/deduplicate-diagnostics-2.duplicate.stderr

@@ -0,0 +1,37 @@
+warning: floating-point types cannot be used in patterns
+  --> $DIR/deduplicate-diagnostics-2.rs:7:9
+   |
+LL |         1.0 => {}
+   |         ^^^
+   |
+   = note: `#[warn(illegal_floating_point_literal_pattern)]` on by default
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #41620 <https://github.com/rust-lang/rust/issues/41620>
+
+warning: floating-point types cannot be used in patterns
+  --> $DIR/deduplicate-diagnostics-2.rs:11:9
+   |
+LL |         2.0 => {}
+   |         ^^^
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #41620 <https://github.com/rust-lang/rust/issues/41620>
+
+warning: floating-point types cannot be used in patterns
+  --> $DIR/deduplicate-diagnostics-2.rs:7:9
+   |
+LL |         1.0 => {}
+   |         ^^^
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #41620 <https://github.com/rust-lang/rust/issues/41620>
+
+warning: floating-point types cannot be used in patterns
+  --> $DIR/deduplicate-diagnostics-2.rs:11:9
+   |
+LL |         2.0 => {}
+   |         ^^^
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #41620 <https://github.com/rust-lang/rust/issues/41620>
+

src/test/ui/deduplicate-diagnostics-2.rs

@@ -0,0 +1,17 @@
+// build-pass
+// revisions: duplicate deduplicate
+//[deduplicate] compile-flags: -Z deduplicate-diagnostics=yes
+
+fn main() {
+    match 0.0 {
+        1.0 => {} //~ WARNING floating-point types cannot be used in patterns
+                  //~| WARNING this was previously accepted
+                  //~| WARNING floating-point types cannot be used in patterns
+                  //~| WARNING this was previously accepted
+        2.0 => {} //~ WARNING floating-point types cannot be used in patterns
+                  //~| WARNING this was previously accepted
+                  //[duplicate]~| WARNING floating-point types cannot be used in patterns
+                  //[duplicate]~| WARNING this was previously accepted
+        _ => {}
+    }
+}

src/test/ui/deduplicate-diagnostics.deduplicate.stderr

@@ -1,8 +1,15 @@
+error[E0452]: malformed lint attribute input
+  --> $DIR/deduplicate-diagnostics.rs:8:8
+   |
+LL | #[deny("literal")]
+   |        ^^^^^^^^^ bad attribute argument
+
 error: cannot find derive macro `Unresolved` in this scope
   --> $DIR/deduplicate-diagnostics.rs:4:10
    |
 LL | #[derive(Unresolved)]
    |          ^^^^^^^^^^
 
-error: aborting due to previous error
+error: aborting due to 2 previous errors
 
+For more information about this error, try `rustc --explain E0452`.

src/test/ui/deduplicate-diagnostics.duplicate.stderr

@@ -1,3 +1,9 @@
+error[E0452]: malformed lint attribute input
+  --> $DIR/deduplicate-diagnostics.rs:8:8
+   |
+LL | #[deny("literal")]
+   |        ^^^^^^^^^ bad attribute argument
+
 error: cannot find derive macro `Unresolved` in this scope
   --> $DIR/deduplicate-diagnostics.rs:4:10
    |
@@ -10,5 +16,18 @@ error: cannot find derive macro `Unresolved` in this scope
 LL | #[derive(Unresolved)]
    |          ^^^^^^^^^^
 
-error: aborting due to 2 previous errors
+error[E0452]: malformed lint attribute input
+  --> $DIR/deduplicate-diagnostics.rs:8:8
+   |
+LL | #[deny("literal")]
+   |        ^^^^^^^^^ bad attribute argument
 
+error[E0452]: malformed lint attribute input
+  --> $DIR/deduplicate-diagnostics.rs:8:8
+   |
+LL | #[deny("literal")]
+   |        ^^^^^^^^^ bad attribute argument
+
+error: aborting due to 5 previous errors
+
+For more information about this error, try `rustc --explain E0452`.

src/test/ui/deduplicate-diagnostics.rs

@@ -5,4 +5,7 @@
                       //[duplicate]~| ERROR cannot find derive macro `Unresolved` in this scope
 struct S;
 
+#[deny("literal")] //~ ERROR malformed lint attribute input
+                   //[duplicate]~| ERROR malformed lint attribute input
+                   //[duplicate]~| ERROR malformed lint attribute input
 fn main() {}

src/test/ui/generator/auto-trait-regions.nll.stderr

@@ -1,5 +1,5 @@
 error[E0716]: temporary value dropped while borrowed
-  --> $DIR/auto-trait-regions.rs:44:24
+  --> $DIR/auto-trait-regions.rs:45:24
    |
 LL |         let a = A(&mut true, &mut true, No);
    |                        ^^^^                - temporary value is freed at the end of this statement
@@ -12,7 +12,7 @@ LL |         assert_foo(a);
    = note: consider using a `let` binding to create a longer lived value
 
 error[E0716]: temporary value dropped while borrowed
-  --> $DIR/auto-trait-regions.rs:44:35
+  --> $DIR/auto-trait-regions.rs:45:35
    |
 LL |         let a = A(&mut true, &mut true, No);
    |                                   ^^^^     - temporary value is freed at the end of this statement
@@ -31,7 +31,7 @@ LL |     assert_foo(gen);
    |     ^^^^^^^^^^^^^^^
 
 error: higher-ranked subtype error
-  --> $DIR/auto-trait-regions.rs:48:5
+  --> $DIR/auto-trait-regions.rs:49:5
    |
 LL |     assert_foo(gen);
    |     ^^^^^^^^^^^^^^^

src/test/ui/hrtb/hrtb-perfect-forwarding.nll.stderr

@@ -39,6 +39,7 @@ LL | |     // Not OK -- The forwarding impl for `Foo` requires that `Bar` also
 ...  |
 LL | |     foo_hrtb_bar_not(&mut t);
    | |     ------------------------ recursive call site
+LL | |
 LL | | }
    | |_^ cannot return without recursing
    |
@@ -62,7 +63,7 @@ LL |     foo_hrtb_bar_not(&mut t);
    |     ^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: function cannot return without recursing
-  --> $DIR/hrtb-perfect-forwarding.rs:49:1
+  --> $DIR/hrtb-perfect-forwarding.rs:50:1
    |
 LL | / fn foo_hrtb_bar_hrtb<T>(mut t: T)
 LL | |     where T : for<'a> Foo<&'a isize> + for<'b> Bar<&'b isize>