Rollup merge of rust-lang#49046 - Zoxc:error-summary, r=michaelwoerister

Always print `aborting due to n previous error(s)`

src/librustc_driver/lib.rs

@@ -63,6 +63,7 @@ use rustc_resolve as resolve;
 use rustc_save_analysis as save;
 use rustc_save_analysis::DumpHandler;
 use rustc_data_structures::sync::Lrc;
+use rustc_data_structures::OnDrop;
 use rustc::session::{self, config, Session, build_session, CompileResult};
 use rustc::session::CompileIncomplete;
 use rustc::session::config::{Input, PrintRequest, ErrorOutputType};
@@ -515,30 +516,35 @@ fn run_compiler_impl<'a>(args: &[String],
     target_features::add_configuration(&mut cfg, &sess, &*trans);
     sess.parse_sess.config = cfg;
 
-    let plugins = sess.opts.debugging_opts.extra_plugins.clone();
-
-    let cstore = CStore::new(trans.metadata_loader());
-
-    do_or_return!(callbacks.late_callback(&*trans,
-                                          &matches,
-                                          &sess,
-                                          &cstore,
-                                          &input,
-                                          &odir,
-                                          &ofile), Some(sess));
-
-    let control = callbacks.build_controller(&sess, &matches);
-
-    (driver::compile_input(trans,
-                           &sess,
-                           &cstore,
-                           &input_file_path,
-                           &input,
-                           &odir,
-                           &ofile,
-                           Some(plugins),
-                           &control),
-     Some(sess))
+    let result = {
+        let plugins = sess.opts.debugging_opts.extra_plugins.clone();
+
+        let cstore = CStore::new(trans.metadata_loader());
+
+        do_or_return!(callbacks.late_callback(&*trans,
+                                              &matches,
+                                              &sess,
+                                              &cstore,
+                                              &input,
+                                              &odir,
+                                              &ofile), Some(sess));
+
+        let _sess_abort_error = OnDrop(|| sess.diagnostic().print_error_count());
+
+        let control = callbacks.build_controller(&sess, &matches);
+
+        driver::compile_input(trans,
+                              &sess,
+                              &cstore,
+                              &input_file_path,
+                              &input,
+                              &odir,
+                              &ofile,
+                              Some(plugins),
+                              &control)
+    };
+
+    (result, Some(sess))
 }
 
 // Extract output directory and file from matches.

src/librustc_errors/lib.rs

@@ -558,21 +558,15 @@ impl Handler {
     pub fn has_errors(&self) -> bool {
         self.err_count() > 0
     }
-    pub fn abort_if_errors(&self) {
-        let s;
-        match self.err_count() {
-            0 => {
-                if let Some(bug) = self.delayed_span_bug.borrow_mut().take() {
-                    DiagnosticBuilder::new_diagnostic(self, bug).emit();
-                }
-                return;
-            }
-            1 => s = "aborting due to previous error".to_string(),
-            _ => {
-                s = format!("aborting due to {} previous errors", self.err_count());
-            }
-        }
-        let err = self.fatal(&s);
+
+    pub fn print_error_count(&self) {
+        let s = match self.err_count() {
+            0 => return,
+            1 => "aborting due to previous error".to_string(),
+            _ => format!("aborting due to {} previous errors", self.err_count())
+        };
+
+        let _ = self.fatal(&s);
 
         let can_show_explain = self.emitter.borrow().should_show_explain();
         let are_there_diagnostics = !self.tracked_diagnostic_codes.borrow().is_empty();
@@ -603,8 +597,16 @@ impl Handler {
                 }
             }
         }
+    }
 
-        err.raise();
+    pub fn abort_if_errors(&self) {
+        if self.err_count() == 0 {
+            if let Some(bug) = self.delayed_span_bug.borrow_mut().take() {
+                DiagnosticBuilder::new_diagnostic(self, bug).emit();
+            }
+            return;
+        }
+        FatalError.raise();
     }
     pub fn emit(&self, msp: &MultiSpan, msg: &str, lvl: Level) {
         if lvl == Warning && !self.flags.can_emit_warnings {

src/librustc_typeck/astconv.rs

@@ -27,6 +27,7 @@ use std::slice;
 use require_c_abi_if_variadic;
 use util::common::ErrorReported;
 use util::nodemap::FxHashSet;
+use errors::FatalError;
 
 use std::iter;
 use syntax::{abi, ast};
@@ -337,7 +338,7 @@ impl<'o, 'gcx: 'tcx, 'tcx> AstConv<'gcx, 'tcx>+'o {
             Def::Trait(trait_def_id) => trait_def_id,
             Def::TraitAlias(alias_def_id) => alias_def_id,
             Def::Err => {
-                self.tcx().sess.fatal("cannot continue compilation due to previous error");
+                FatalError.raise();
             }
             _ => unreachable!(),
         }

src/test/ui-fulldeps/custom-derive/issue-36935.stderr

@@ -6,3 +6,5 @@ LL | #[derive(Foo, Bar)] //~ ERROR proc-macro derive panicked
    |
    = help: message: lolnope
 
+error: aborting due to previous error
+

src/test/ui-fulldeps/proc-macro/load-panic.stderr

@@ -6,3 +6,5 @@ LL | #[derive(A)]
    |
    = help: message: nope!
 
+error: aborting due to previous error
+

src/test/ui/codemap_tests/two_files.stderr

@@ -4,5 +4,6 @@ error[E0404]: expected trait, found type alias `Bar`
 LL | impl Bar for Baz { } //~ ERROR expected trait, found type alias
    |      ^^^ type aliases cannot be used for traits
 
-error: cannot continue compilation due to previous error
+error: aborting due to previous error
 
+For more information about this error, try `rustc --explain E0404`.

src/test/ui/cross-file-errors/main.stderr

@@ -9,3 +9,5 @@ LL |         _
 LL |     underscore!();
    |     -------------- in this macro invocation
 
+error: aborting due to previous error
+

src/test/ui/did_you_mean/recursion_limit_macro.stderr

@@ -9,3 +9,5 @@ LL |     recurse!(0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9);
    |
    = help: consider adding a `#![recursion_limit="20"]` attribute to your crate
 
+error: aborting due to previous error
+

src/test/ui/error-codes/E0404.stderr

@@ -10,5 +10,6 @@ error[E0404]: expected trait, found struct `Foo`
 LL | fn baz<T: Foo>(_: T) {} //~ ERROR E0404
    |           ^^^ not a trait
 
-error: cannot continue compilation due to previous error
+error: aborting due to 2 previous errors
 
+For more information about this error, try `rustc --explain E0404`.

src/test/ui/error-codes/E0405.stderr

@@ -4,5 +4,6 @@ error[E0405]: cannot find trait `SomeTrait` in this scope
 LL | impl SomeTrait for Foo {} //~ ERROR E0405
    |      ^^^^^^^^^ not found in this scope
 
-error: cannot continue compilation due to previous error
+error: aborting due to previous error
 
+For more information about this error, try `rustc --explain E0405`.

src/test/ui/feature-gate-fn_must_use-cap-lints-allow.stderr

@@ -4,3 +4,5 @@ error: compilation successful
 LL | fn main() {} //~ ERROR compilation successful
    | ^^^^^^^^^^^^
 
+error: aborting due to previous error
+

src/test/ui/feature-gate-fn_must_use.stderr

@@ -20,3 +20,5 @@ error: compilation successful
 LL | fn main() {} //~ ERROR compilation successful
    | ^^^^^^^^^^^^
 
+error: aborting due to previous error
+

src/test/ui/feature-gate/issue-43106-gating-of-builtin-attrs.stderr

@@ -1316,3 +1316,5 @@ LL | |     println!("Hello World");
 LL | | }
    | |_^
 
+error: aborting due to previous error
+

src/test/ui/feature-gate/issue-43106-gating-of-deprecated.stderr

@@ -6,3 +6,5 @@ LL | |     println!("Hello World");
 LL | | }
    | |_^
 
+error: aborting due to previous error
+

src/test/ui/impl-trait/universal_wrong_bounds.stderr

@@ -24,5 +24,7 @@ help: possible candidate is found in another module, you can import it into scop
 LL | use std::fmt::Debug;
    |
 
-error: cannot continue compilation due to previous error
+error: aborting due to 3 previous errors
 
+Some errors occurred: E0405, E0425.
+For more information about an error, try `rustc --explain E0405`.

src/test/ui/issue-22644.stderr

@@ -89,3 +89,5 @@ error: expected type, found `4`
 LL |     println!("{}", a: &mut 4); //~ ERROR expected type, found `4`
    |                            ^ expecting a type here because of type ascription
 
+error: aborting due to 9 previous errors
+

src/test/ui/issue-44406.stderr

@@ -13,3 +13,5 @@ LL |         bar(baz: $rest)
 LL |     foo!(true); //~ ERROR expected type, found keyword
    |          ^^^^ expecting a type here because of type ascription
 
+error: aborting due to 2 previous errors
+

src/test/ui/lint-output-format-2.stderr

@@ -22,3 +22,5 @@ LL | |     let _y = bar();
 LL | | }
    | |_^
 
+error: aborting due to previous error
+

src/test/ui/loops-reject-duplicate-labels-2.stderr

@@ -70,3 +70,5 @@ LL | |     foo();
 LL | | }
    | |_^
 
+error: aborting due to previous error
+

src/test/ui/loops-reject-duplicate-labels.stderr

@@ -73,3 +73,5 @@ LL | |     foo();
 LL | | }
    | |_^
 
+error: aborting due to previous error
+

src/test/ui/loops-reject-labels-shadowing-lifetimes.stderr

@@ -108,3 +108,5 @@ LL | |     foo();
 LL | | }
    | |_^
 
+error: aborting due to previous error
+

src/test/ui/loops-reject-lifetime-shadowing-label.stderr

@@ -14,3 +14,5 @@ LL | |     foo();
 LL | | }
    | |_^
 
+error: aborting due to previous error
+

src/test/ui/macro-context.stderr

@@ -43,3 +43,5 @@ LL |     () => ( i ; typeof );   //~ ERROR expected expression, found reserved k
 LL |     m!();
    |     ----- in this macro invocation
 
+error: aborting due to 4 previous errors
+

src/test/ui/macros/macro_path_as_generic_bound.stderr

@@ -4,5 +4,6 @@ error[E0433]: failed to resolve. Use of undeclared type or module `m`
 LL | foo!(m::m2::A); //~ ERROR failed to resolve
    |      ^ Use of undeclared type or module `m`
 
-error: cannot continue compilation due to previous error
+error: aborting due to previous error
 
+For more information about this error, try `rustc --explain E0433`.

src/test/ui/macros/trace_faulty_macros.stderr

@@ -45,3 +45,5 @@ LL |     my_recursive_macro!();
    = note: expanding `my_recursive_macro! {  }`
    = note: to `my_recursive_macro ! (  ) ;`
 
+error: aborting due to 2 previous errors
+

src/test/ui/raw_string.stderr

@@ -6,3 +6,5 @@ LL |     let x = r##"lol"#;
    |
    = note: this raw string should be terminated with `"##`
 
+error: aborting due to previous error
+

src/test/ui/resolve/issue-21221-1.stderr

@@ -45,5 +45,7 @@ help: possible candidate is found in another module, you can import it into scop
 LL | use std::ops::Div;
    |
 
-error: cannot continue compilation due to previous error
+error: aborting due to 4 previous errors
 
+Some errors occurred: E0405, E0412.
+For more information about an error, try `rustc --explain E0405`.

src/test/ui/resolve/issue-21221-2.stderr

@@ -8,5 +8,6 @@ help: possible candidate is found in another module, you can import it into scop
 LL | use foo::bar::T;
    |
 
-error: cannot continue compilation due to previous error
+error: aborting due to previous error
 
+For more information about this error, try `rustc --explain E0405`.

src/test/ui/resolve/issue-21221-3.stderr

@@ -8,5 +8,6 @@ help: possible candidate is found in another module, you can import it into scop
 LL | use issue_21221_3::outer::OuterTrait;
    |
 
-error: cannot continue compilation due to previous error
+error: aborting due to previous error
 
+For more information about this error, try `rustc --explain E0405`.

src/test/ui/resolve/issue-21221-4.stderr

@@ -8,5 +8,6 @@ help: possible candidate is found in another module, you can import it into scop
 LL | use issue_21221_4::T;
    |
 
-error: cannot continue compilation due to previous error
+error: aborting due to previous error
 
+For more information about this error, try `rustc --explain E0405`.

src/test/ui/resolve/issue-3907.stderr

@@ -8,5 +8,6 @@ help: possible better candidate is found in another module, you can import it in
 LL | use issue_3907::Foo;
    |
 
-error: cannot continue compilation due to previous error
+error: aborting due to previous error
 
+For more information about this error, try `rustc --explain E0404`.

src/test/ui/resolve/issue-5035.stderr

@@ -13,5 +13,7 @@ LL | impl K for isize {} //~ ERROR expected trait, found type alias `K`
    |      did you mean `I`?
    |      type aliases cannot be used for traits
 
-error: cannot continue compilation due to previous error
+error: aborting due to 2 previous errors
 
+Some errors occurred: E0404, E0432.
+For more information about an error, try `rustc --explain E0404`.

src/test/ui/resolve/unboxed-closure-sugar-nonexistent-trait.stderr

@@ -10,5 +10,7 @@ error[E0404]: expected trait, found type alias `Typedef`
 LL | fn g<F:Typedef(isize) -> isize>(x: F) {}
    |        ^^^^^^^^^^^^^^^^^^^^^^^ type aliases cannot be used for traits
 
-error: cannot continue compilation due to previous error
+error: aborting due to 2 previous errors
 
+Some errors occurred: E0404, E0405.
+For more information about an error, try `rustc --explain E0404`.

src/test/ui/rfc1598-generic-associated-types/generic-associated-types-where.stderr

@@ -1,2 +0,0 @@
-error: cannot continue compilation due to previous error
-

src/test/ui/span/issue-24690.stderr

@@ -36,3 +36,5 @@ LL | |     println!("{}", theTwo);
 LL | | }
    | |_^
 
+error: aborting due to previous error
+

src/test/ui/span/issue-35987.stderr

@@ -8,5 +8,6 @@ help: possible better candidate is found in another module, you can import it in
 LL | use std::ops::Add;
    |
 
-error: cannot continue compilation due to previous error
+error: aborting due to previous error
 
+For more information about this error, try `rustc --explain E0404`.