Auto merge of rust-lang#3336 - RalfJung:rustup, r=RalfJung

Rustup

Also add regression test for rust-lang/rust#121508.

Author: bors

tests/ui/crashes/ice-10912.rs

@@ -2,7 +2,5 @@
 //@no-rustfix
 fn f2() -> impl Sized { && 3.14159265358979323846E }
 //~^ ERROR: expected at least one digit in exponent
-//~| ERROR: long literal lacking separators
-//~| NOTE: `-D clippy::unreadable-literal` implied by `-D warnings`
 
 fn main() {}

tests/ui/crashes/ice-10912.stderr

@@ -4,14 +4,5 @@ error: expected at least one digit in exponent
 LL | fn f2() -> impl Sized { && 3.14159265358979323846E }
    |                            ^^^^^^^^^^^^^^^^^^^^^^^
 
-error: long literal lacking separators
-  --> tests/ui/crashes/ice-10912.rs:3:28
-   |
-LL | fn f2() -> impl Sized { && 3.14159265358979323846E }
-   |                            ^^^^^^^^^^^^^^^^^^^^^^^ help: consider: `3.141_592_653_589_793_238_46`
-   |
-   = note: `-D clippy::unreadable-literal` implied by `-D warnings`
-   = help: to override `-D warnings` add `#[allow(clippy::unreadable_literal)]`
-
-error: aborting due to 2 previous errors
+error: aborting due to 1 previous error
 

tests/ui/crashes/unreachable-array-or-slice.rs

@@ -0,0 +1,8 @@
+struct Foo(isize, isize, isize, isize);
+
+pub fn main() {
+    let Self::anything_here_kills_it(a, b, ..) = Foo(5, 5, 5, 5);
+    match [5, 5, 5, 5] {
+        [..] => { }
+    }
+}

tests/ui/crashes/unreachable-array-or-slice.stderr

@@ -0,0 +1,9 @@
+error[E0433]: failed to resolve: `Self` is only available in impls, traits, and type definitions
+  --> tests/ui/crashes/unreachable-array-or-slice.rs:4:9
+   |
+LL |     let Self::anything_here_kills_it(a, b, ..) = Foo(5, 5, 5, 5);
+   |         ^^^^ `Self` is only available in impls, traits, and type definitions
+
+error: aborting due to 1 previous error
+
+For more information about this error, try `rustc --explain E0433`.