Rollup merge of #140465 - mejrs:test2, r=jieyouxu

chore: edit and move tests

I deleted `ui/non-copyable-void.rs`: added in ab4105d to test that "nonconstructable" enums are "noncopyable", but these properties are not correlated anymore.

Second commit is kinda messy because I moved/edited/renamed some files at the same time, but I deleted nothing there.

Author: matthiaskrgr

tests/ui/auxiliary/removing-extern-crate.rs

@@ -1,3 +1,5 @@
+//! Check that if there are a lot of errors we truncate the list of errors appropriately
+
 enum Question {
     Yes,
     No,

tests/ui/catch-unwind-bang.rs

@@ -1,5 +1,5 @@
 error[E0425]: cannot find value `y` in this scope
-  --> $DIR/error-festival.rs:14:5
+  --> $DIR/error-festival.rs:16:5
    |
 LL |     y = 2;
    |     ^
@@ -15,47 +15,47 @@ LL |     let y = 2;
    |     +++
 
 error[E0603]: constant `FOO` is private
-  --> $DIR/error-festival.rs:22:10
+  --> $DIR/error-festival.rs:24:10
    |
 LL |     foo::FOO;
    |          ^^^ private constant
    |
 note: the constant `FOO` is defined here
-  --> $DIR/error-festival.rs:7:5
+  --> $DIR/error-festival.rs:9:5
    |
 LL |     const FOO: u32 = 0;
    |     ^^^^^^^^^^^^^^^^^^^
 
 error[E0368]: binary assignment operation `+=` cannot be applied to type `&str`
-  --> $DIR/error-festival.rs:12:5
+  --> $DIR/error-festival.rs:14:5
    |
 LL |     x += 2;
    |     -^^^^^
    |     |
    |     cannot use `+=` on type `&str`
 
 error[E0599]: no method named `z` found for reference `&str` in the current scope
-  --> $DIR/error-festival.rs:16:7
+  --> $DIR/error-festival.rs:18:7
    |
 LL |     x.z();
    |       ^ method not found in `&str`
 
 error[E0600]: cannot apply unary operator `!` to type `Question`
-  --> $DIR/error-festival.rs:19:5
+  --> $DIR/error-festival.rs:21:5
    |
 LL |     !Question::Yes;
    |     ^^^^^^^^^^^^^^ cannot apply unary operator `!`
    |
 note: an implementation of `Not` might be missing for `Question`
-  --> $DIR/error-festival.rs:1:1
+  --> $DIR/error-festival.rs:3:1
    |
 LL | enum Question {
    | ^^^^^^^^^^^^^ must implement `Not`
 note: the trait `Not` must be implemented
   --> $SRC_DIR/core/src/ops/bit.rs:LL:COL
 
 error[E0604]: only `u8` can be cast as `char`, not `u32`
-  --> $DIR/error-festival.rs:25:5
+  --> $DIR/error-festival.rs:27:5
    |
 LL |     0u32 as char;
    |     ^^^^^^^^^^^^
@@ -64,13 +64,13 @@ LL |     0u32 as char;
    |     help: try `char::from_u32` instead: `char::from_u32(0u32)`
 
 error[E0605]: non-primitive cast: `u8` as `Vec<u8>`
-  --> $DIR/error-festival.rs:29:5
+  --> $DIR/error-festival.rs:31:5
    |
 LL |     x as Vec<u8>;
    |     ^^^^^^^^^^^^ an `as` expression can only be used to convert between primitive types or to coerce to a specific trait object
 
 error[E0054]: cannot cast `{integer}` as `bool`
-  --> $DIR/error-festival.rs:33:24
+  --> $DIR/error-festival.rs:35:24
    |
 LL |     let x_is_nonzero = x as bool;
    |                        ^^^^^^^^^
@@ -82,7 +82,7 @@ LL +     let x_is_nonzero = x != 0;
    |
 
 error[E0606]: casting `&u8` as `u32` is invalid
-  --> $DIR/error-festival.rs:37:18
+  --> $DIR/error-festival.rs:39:18
    |
 LL |     let y: u32 = x as u32;
    |                  ^^^^^^^^
@@ -93,7 +93,7 @@ LL |     let y: u32 = *x as u32;
    |                  +
 
 error[E0607]: cannot cast thin pointer `*const u8` to wide pointer `*const [u8]`
-  --> $DIR/error-festival.rs:41:5
+  --> $DIR/error-festival.rs:43:5
    |
 LL |     v as *const [u8];
    |     ^^^^^^^^^^^^^^^^

tests/ui/cfguard-run.rs renamed to tests/ui/codegen/cfguard-run.rs

@@ -0,0 +1,15 @@
+//! Check that the unwind machinery handles uninhabited types correctly.
+//! It used to call `std::mem::uninitialized::<!>();` at some point...
+//!
+//! See <https://github.com/rust-lang/rust/issues/39432>
+
+//@ run-pass
+//@ needs-unwind
+
+fn worker() -> ! {
+    panic!()
+}
+
+fn main() {
+    std::panic::catch_unwind(worker).unwrap_err();
+}

tests/ui/error-festival.rs renamed to tests/ui/error-emitter/error-festival.rs

@@ -0,0 +1,2 @@
+// intentionally blank, used because we need an extern crate for
+// `removing-extern-crate.rs` but don't care about what's in it.

tests/ui/error-festival.stderr renamed to tests/ui/error-emitter/error-festival.stderr

@@ -1,5 +1,5 @@
 //@ edition:2018
-//@ aux-build:removing-extern-crate.rs
+//@ aux-build:dummy-crate.rs
 //@ run-rustfix
 //@ check-pass