Rollup merge of rust-lang#53622 - petrochenkov:nomain, r=oli-obk

cleanup: Add main functions to some UI tests

Author: Mark-Simulacrum

src/test/ui/enum/enum-discrim-autosizing.rs

@@ -18,3 +18,4 @@ enum Eu64 {
     Bu64 = 0x8000_0000_0000_0000 //~ERROR already exists
 }
 
+fn main() {}

src/test/ui/enum/enum-discrim-autosizing.stderr

@@ -1,7 +1,3 @@
-error[E0601]: `main` function not found in crate `enum_discrim_autosizing`
-   |
-   = note: consider adding a `main` function to `$DIR/enum-discrim-autosizing.rs`
-
 error[E0081]: discriminant value `0` already exists
   --> $DIR/enum-discrim-autosizing.rs:18:12
    |
@@ -10,7 +6,6 @@ LL |     Au64 = 0,
 LL |     Bu64 = 0x8000_0000_0000_0000 //~ERROR already exists
    |            ^^^^^^^^^^^^^^^^^^^^^ enum already has `0`
 
-error: aborting due to 2 previous errors
+error: aborting due to previous error
 
-Some errors occurred: E0081, E0601.
-For more information about an error, try `rustc --explain E0081`.
+For more information about this error, try `rustc --explain E0081`.

src/test/ui/gated-bad-feature.rs

@@ -20,3 +20,5 @@
 #![feature = "foo"] //~ ERROR: malformed feature
 
 #![feature(test_removed_feature)] //~ ERROR: feature has been removed
+
+fn main() {}

src/test/ui/gated-bad-feature.stderr

@@ -28,11 +28,7 @@ error[E0557]: feature has been removed
 LL | #![feature(test_removed_feature)] //~ ERROR: feature has been removed
    |            ^^^^^^^^^^^^^^^^^^^^
 
-error[E0601]: `main` function not found in crate `gated_bad_feature`
-   |
-   = note: consider adding a `main` function to `$DIR/gated-bad-feature.rs`
-
-error: aborting due to 6 previous errors
+error: aborting due to 5 previous errors
 
-Some errors occurred: E0555, E0556, E0557, E0601.
+Some errors occurred: E0555, E0556, E0557.
 For more information about an error, try `rustc --explain E0555`.

src/test/ui/hygiene/generate-mod.rs

@@ -55,3 +55,5 @@ fn check_legacy() {
     struct FromOutside;
     genmod_legacy!();
 }
+
+fn main() {}

src/test/ui/hygiene/generate-mod.stderr

@@ -46,11 +46,6 @@ LL |         type Inner = Outer; //~ ERROR cannot find type `Outer` in this scop
 LL |     genmod_legacy!();
    |     ----------------- in this macro invocation
 
-error[E0601]: `main` function not found in crate `generate_mod`
-   |
-   = note: consider adding a `main` function to `$DIR/generate-mod.rs`
-
-error: aborting due to 7 previous errors
+error: aborting due to 6 previous errors
 
-Some errors occurred: E0412, E0601.
-For more information about an error, try `rustc --explain E0412`.
+For more information about this error, try `rustc --explain E0412`.

src/test/ui/hygiene/no_implicit_prelude.rs

@@ -23,3 +23,5 @@ mod bar {
     }
     fn f() { ::foo::m!(); }
 }
+
+fn main() {}

src/test/ui/hygiene/no_implicit_prelude.stderr

@@ -7,10 +7,6 @@ LL |     fn f() { ::bar::m!(); }
 LL |         Vec::new(); //~ ERROR failed to resolve
    |         ^^^ Use of undeclared type or module `Vec`
 
-error[E0601]: `main` function not found in crate `no_implicit_prelude`
-   |
-   = note: consider adding a `main` function to `$DIR/no_implicit_prelude.rs`
-
 error[E0599]: no method named `clone` found for type `()` in the current scope
   --> $DIR/no_implicit_prelude.rs:22:12
    |
@@ -24,7 +20,7 @@ LL |         ().clone() //~ ERROR no method named `clone` found
    = note: the following trait is implemented but not in scope, perhaps add a `use` for it:
            `use std::clone::Clone;`
 
-error: aborting due to 3 previous errors
+error: aborting due to 2 previous errors
 
-Some errors occurred: E0433, E0599, E0601.
+Some errors occurred: E0433, E0599.
 For more information about an error, try `rustc --explain E0433`.

src/test/ui/imports/import-glob-circular.rs

@@ -25,3 +25,5 @@ mod test {
 
     fn test() { f1066(); } //~ ERROR cannot find function `f1066` in this scope
 }
+
+fn main() {}

src/test/ui/imports/import-glob-circular.stderr

@@ -4,11 +4,6 @@ error[E0425]: cannot find function `f1066` in this scope
 LL |     fn test() { f1066(); } //~ ERROR cannot find function `f1066` in this scope
    |                 ^^^^^ not found in this scope
 
-error[E0601]: `main` function not found in crate `import_glob_circular`
-   |
-   = note: consider adding a `main` function to `$DIR/import-glob-circular.rs`
-
-error: aborting due to 2 previous errors
+error: aborting due to previous error
 
-Some errors occurred: E0425, E0601.
-For more information about an error, try `rustc --explain E0425`.
+For more information about this error, try `rustc --explain E0425`.