Show number in error message even for one error

Co-authored-by: Adrian <adrian.iosdev@gmail.com>

Author: Noratrieb

compiler/rustc_errors/src/lib.rs

@@ -1465,7 +1465,7 @@ impl HandlerInner {
         };
         let errors = match self.deduplicated_err_count {
             0 => Cow::from(""),
-            1 => Cow::from("aborting due to previous error"),
+            1 => Cow::from("aborting due to 1 previous error"),
             count => Cow::from(format!("aborting due to {count} previous errors")),
         };
         if self.treat_err_as_bug() {

compiler/rustc_hir_typeck/src/expr.rs

@@ -1932,7 +1932,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     /// 8 |     foo::Foo {};
     ///   |     ^^^^^^^^ missing `you_can_use_this_field`
     ///
-    /// error: aborting due to previous error
+    /// error: aborting due to 1 previous error
     /// ```
     fn report_missing_fields(
         &self,
@@ -2049,7 +2049,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     /// 8 |     foo::Foo {};
     ///   |     ^^^^^^^^
     ///
-    /// error: aborting due to previous error
+    /// error: aborting due to 1 previous error
     /// ```
     fn report_private_fields(
         &self,

library/core/src/intrinsics/mir.rs

@@ -193,7 +193,7 @@
 //! 27 | |     )
 //!    | |_____- binding declared here but left uninitialized
 //!
-//! error: aborting due to previous error
+//! error: aborting due to 1 previous error
 //!
 //! For more information about this error, try `rustc --explain E0381`.
 //! ```

tests/ui/abi/abi-typo-unstable.stderr

@@ -6,6 +6,6 @@ LL | extern "rust-intrinsec" fn rust_intrinsic() {}
    |
    = note: invoke `rustc --print=calling-conventions` for a full list of supported calling conventions.
 
-error: aborting due to previous error
+error: aborting due to 1 previous error
 
 For more information about this error, try `rustc --explain E0703`.

tests/ui/alloc-error/alloc-error-handler-bad-signature-3.stderr

@@ -16,6 +16,6 @@ LL | fn oom() -> ! {
    |    ^^^
    = note: this error originates in the attribute macro `alloc_error_handler` (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error: aborting due to previous error
+error: aborting due to 1 previous error
 
 For more information about this error, try `rustc --explain E0061`.

tests/ui/allocator/allocator-args.stderr

@@ -4,5 +4,5 @@ error: malformed `global_allocator` attribute input
 LL | #[global_allocator(malloc)]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[global_allocator]`
 
-error: aborting due to previous error
+error: aborting due to 1 previous error
 

tests/ui/allocator/function-allocator.stderr

@@ -4,5 +4,5 @@ error: allocators must be statics
 LL | fn foo() {}
    | ^^^^^^^^^^^
 
-error: aborting due to previous error
+error: aborting due to 1 previous error
 

tests/ui/allocator/two-allocators.stderr

@@ -10,5 +10,5 @@ LL | static B: System = System;
    |
    = note: this error originates in the attribute macro `global_allocator` (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error: aborting due to previous error
+error: aborting due to 1 previous error
 

tests/ui/allocator/two-allocators2.stderr

@@ -1,4 +1,4 @@
 error: the `#[global_allocator]` in this crate conflicts with global allocator in: system_allocator
 
-error: aborting due to previous error
+error: aborting due to 1 previous error
 

tests/ui/allocator/two-allocators3.stderr

@@ -1,4 +1,4 @@
 error: the `#[global_allocator]` in system_allocator conflicts with global allocator in: system_allocator2
 
-error: aborting due to previous error
+error: aborting due to 1 previous error