diff --git a/src/librustc/middle/entry.rs b/src/librustc/middle/entry.rs
index 8b4b9aaeac848..37d79f408f3f0 100644
--- a/src/librustc/middle/entry.rs
+++ b/src/librustc/middle/entry.rs
@@ -55,7 +55,9 @@ impl<'a, 'tcx> ItemLikeVisitor<'tcx> for EntryContext<'a, 'tcx> {
     }
 }
 
-pub fn find_entry_point(session: &Session, hir_map: &hir_map::Map) {
+pub fn find_entry_point(session: &Session,
+                        hir_map: &hir_map::Map,
+                        crate_name: &str) {
     let any_exe = session.crate_types.borrow().iter().any(|ty| {
         *ty == config::CrateTypeExecutable
     });
@@ -81,7 +83,7 @@ pub fn find_entry_point(session: &Session, hir_map: &hir_map::Map) {
 
     hir_map.krate().visit_all_item_likes(&mut ctxt);
 
-    configure_main(&mut ctxt);
+    configure_main(&mut ctxt, crate_name);
 }
 
 // Beware, this is duplicated in libsyntax/entry.rs, make sure to keep
@@ -150,7 +152,7 @@ fn find_item(item: &Item, ctxt: &mut EntryContext, at_root: bool) {
     }
 }
 
-fn configure_main(this: &mut EntryContext) {
+fn configure_main(this: &mut EntryContext, crate_name: &str) {
     if this.start_fn.is_some() {
         *this.session.entry_fn.borrow_mut() = this.start_fn;
         this.session.entry_type.set(Some(config::EntryStart));
@@ -162,7 +164,8 @@ fn configure_main(this: &mut EntryContext) {
         this.session.entry_type.set(Some(config::EntryMain));
     } else {
         // No main function
-        let mut err = struct_err!(this.session, E0601, "main function not found");
+        let mut err = struct_err!(this.session, E0601,
+            "`main` function not found in crate `{}`", crate_name);
         if !this.non_main_fns.is_empty() {
             // There were some functions named 'main' though. Try to give the user a hint.
             err.note("the main function must be defined at the crate level \
@@ -175,6 +178,9 @@ fn configure_main(this: &mut EntryContext) {
             err.emit();
             this.session.abort_if_errors();
         } else {
+            if let Some(ref filename) = this.session.local_crate_source_file {
+                err.note(&format!("consider adding a `main` function to `{}`", filename.display()));
+            }
             if this.session.teach(&err.get_code().unwrap()) {
                 err.note("If you don't know the basics of Rust, you can go look to the Rust Book \
                           to get started: https://doc.rust-lang.org/book/");
diff --git a/src/librustc_driver/driver.rs b/src/librustc_driver/driver.rs
index 542f818c3818a..e52575f02b2ff 100644
--- a/src/librustc_driver/driver.rs
+++ b/src/librustc_driver/driver.rs
@@ -979,7 +979,7 @@ pub fn phase_3_run_analysis_passes<'tcx, F, R>(trans: &TransCrate,
 
     time(sess,
          "looking for entry point",
-         || middle::entry::find_entry_point(sess, &hir_map));
+         || middle::entry::find_entry_point(sess, &hir_map, name));
 
     sess.plugin_registrar_fn.set(time(sess, "looking for plugin registrar", || {
         plugin::build::find_plugin_registrar(sess.diagnostic(), &hir_map)
diff --git a/src/test/compile-fail/cfg-attr-cfg-2.rs b/src/test/compile-fail/cfg-attr-cfg-2.rs
index b71a3be5dcea4..58a62d45ea5d7 100644
--- a/src/test/compile-fail/cfg-attr-cfg-2.rs
+++ b/src/test/compile-fail/cfg-attr-cfg-2.rs
@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //
-// error-pattern: main function not found
+// error-pattern: `main` function not found
 // compile-flags: --cfg foo
 
 // main is conditionally compiled, but the conditional compilation
diff --git a/src/test/compile-fail/cfg-in-crate-1.rs b/src/test/compile-fail/cfg-in-crate-1.rs
index 94ae8d89b4fc4..bbccf2bcd0f81 100644
--- a/src/test/compile-fail/cfg-in-crate-1.rs
+++ b/src/test/compile-fail/cfg-in-crate-1.rs
@@ -8,6 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// error-pattern:main function not found
+// error-pattern: `main` function not found
 
 #![cfg(bar)]
diff --git a/src/test/compile-fail/elided-test.rs b/src/test/compile-fail/elided-test.rs
index b62214b12f9a0..0cdd0010a745d 100644
--- a/src/test/compile-fail/elided-test.rs
+++ b/src/test/compile-fail/elided-test.rs
@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// error-pattern: main function not found
+// error-pattern: `main` function not found
 
 // Since we're not compiling a test runner this function should be elided
 // and the build will fail because main doesn't exist
diff --git a/src/test/compile-fail/missing-main.rs b/src/test/compile-fail/missing-main.rs
index 4bfdaf69480e6..2788a5c2d5854 100644
--- a/src/test/compile-fail/missing-main.rs
+++ b/src/test/compile-fail/missing-main.rs
@@ -8,5 +8,5 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// error-pattern:main function not found
+// error-pattern: `main` function not found
 fn mian() { }
diff --git a/src/test/ui/error-codes/E0522.rs b/src/test/ui/error-codes/E0522.rs
index 3d4377853464b..c50cb759e05c2 100644
--- a/src/test/ui/error-codes/E0522.rs
+++ b/src/test/ui/error-codes/E0522.rs
@@ -15,3 +15,5 @@ fn cookie() -> ! {
 //~^^ ERROR definition of an unknown language item: `cookie` [E0522]
     loop {}
 }
+
+fn main() {}
diff --git a/src/test/ui/error-codes/E0522.stderr b/src/test/ui/error-codes/E0522.stderr
index 5a6331bca0bde..9f3f8968d734e 100644
--- a/src/test/ui/error-codes/E0522.stderr
+++ b/src/test/ui/error-codes/E0522.stderr
@@ -1,12 +1,9 @@
-error[E0601]: main function not found
-
 error[E0522]: definition of an unknown language item: `cookie`
   --> $DIR/E0522.rs:13:1
    |
 LL | #[lang = "cookie"]
    | ^^^^^^^^^^^^^^^^^^ definition of unknown language item `cookie`
 
-error: aborting due to 2 previous errors
+error: aborting due to previous error
 
-Some errors occurred: E0522, E0601.
-For more information about an error, try `rustc --explain E0522`.
+For more information about this error, try `rustc --explain E0522`.
diff --git a/src/test/ui/error-codes/E0601.rs b/src/test/ui/error-codes/E0601.rs
new file mode 100644
index 0000000000000..37b3f523475fc
--- /dev/null
+++ b/src/test/ui/error-codes/E0601.rs
@@ -0,0 +1,11 @@
+// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// Test for main function not found.
diff --git a/src/test/ui/error-codes/E0601.stderr b/src/test/ui/error-codes/E0601.stderr
new file mode 100644
index 0000000000000..cbc20db35da77
--- /dev/null
+++ b/src/test/ui/error-codes/E0601.stderr
@@ -0,0 +1,7 @@
+error[E0601]: `main` function not found in crate `E0601`
+   |
+   = note: consider adding a `main` function to `$DIR/E0601.rs`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0601`.
diff --git a/src/test/ui/feature-gate-i128_type2.rs b/src/test/ui/feature-gate-i128_type2.rs
index d3bd810ceb2b4..8a7d316ed8384 100644
--- a/src/test/ui/feature-gate-i128_type2.rs
+++ b/src/test/ui/feature-gate-i128_type2.rs
@@ -30,3 +30,5 @@ fn test3_2() {
 enum A { //~ ERROR 128-bit type is unstable
     A(u64)
 }
+
+fn main() {}
diff --git a/src/test/ui/feature-gate-i128_type2.stderr b/src/test/ui/feature-gate-i128_type2.stderr
index 2348e7fe2c5b3..23d4d6c98d90a 100644
--- a/src/test/ui/feature-gate-i128_type2.stderr
+++ b/src/test/ui/feature-gate-i128_type2.stderr
@@ -30,8 +30,6 @@ LL |     let x: u128 = 0; //~ ERROR 128-bit type is unstable
    |
    = help: add #![feature(i128_type)] to the crate attributes to enable
 
-error[E0601]: main function not found
-
 error[E0658]: repr with 128-bit type is unstable (see issue #35118)
   --> $DIR/feature-gate-i128_type2.rs:30:1
    |
@@ -42,7 +40,6 @@ LL | | }
    |
    = help: add #![feature(repr128)] to the crate attributes to enable
 
-error: aborting due to 6 previous errors
+error: aborting due to 5 previous errors
 
-Some errors occurred: E0601, E0658.
-For more information about an error, try `rustc --explain E0601`.
+For more information about this error, try `rustc --explain E0658`.
diff --git a/src/test/ui/feature-gate/issue-43106-gating-of-bench.rs b/src/test/ui/feature-gate/issue-43106-gating-of-bench.rs
index a34f98f03559f..6c22679933874 100644
--- a/src/test/ui/feature-gate/issue-43106-gating-of-bench.rs
+++ b/src/test/ui/feature-gate/issue-43106-gating-of-bench.rs
@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// error-pattern: main function not found
+// error-pattern: `main` function not found
 
 // At time of authorship, a crate-level #![bench] with no `--test`
 // will cause compilation to error unconditionally with "main function
diff --git a/src/test/ui/feature-gate/issue-43106-gating-of-bench.stderr b/src/test/ui/feature-gate/issue-43106-gating-of-bench.stderr
index f9f1cce91f1c7..503ef020d9604 100644
--- a/src/test/ui/feature-gate/issue-43106-gating-of-bench.stderr
+++ b/src/test/ui/feature-gate/issue-43106-gating-of-bench.stderr
@@ -1,4 +1,6 @@
-error[E0601]: main function not found
+error[E0601]: `main` function not found in crate `issue_43106_gating_of_bench`
+   |
+   = note: consider adding a `main` function to `$DIR/issue-43106-gating-of-bench.rs`
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gate/issue-43106-gating-of-inline.rs b/src/test/ui/feature-gate/issue-43106-gating-of-inline.rs
index 24e77bf60a8d1..410f960e655fb 100644
--- a/src/test/ui/feature-gate/issue-43106-gating-of-inline.rs
+++ b/src/test/ui/feature-gate/issue-43106-gating-of-inline.rs
@@ -35,3 +35,5 @@ mod inline {
     #[inline = "2100"] impl S { }
     //~^ ERROR attribute should be applied to function
 }
+
+fn main() {}
diff --git a/src/test/ui/feature-gate/issue-43106-gating-of-inline.stderr b/src/test/ui/feature-gate/issue-43106-gating-of-inline.stderr
index 36320be1dc81f..d67d78e31a9d5 100644
--- a/src/test/ui/feature-gate/issue-43106-gating-of-inline.stderr
+++ b/src/test/ui/feature-gate/issue-43106-gating-of-inline.stderr
@@ -1,5 +1,3 @@
-error[E0601]: main function not found
-
 error[E0518]: attribute should be applied to function
   --> $DIR/issue-43106-gating-of-inline.rs:21:1
    |
@@ -39,7 +37,6 @@ error[E0518]: attribute should be applied to function
 LL |     #[inline = "2100"] impl S { }
    |     ^^^^^^^^^^^^^^^^^^ ---------- not a function
 
-error: aborting due to 6 previous errors
+error: aborting due to 5 previous errors
 
-Some errors occurred: E0518, E0601.
-For more information about an error, try `rustc --explain E0518`.
+For more information about this error, try `rustc --explain E0518`.
diff --git a/src/test/ui/feature-gate/issue-43106-gating-of-macro_escape.rs b/src/test/ui/feature-gate/issue-43106-gating-of-macro_escape.rs
index 3b2dbdefebad8..ec3c97beab0f3 100644
--- a/src/test/ui/feature-gate/issue-43106-gating-of-macro_escape.rs
+++ b/src/test/ui/feature-gate/issue-43106-gating-of-macro_escape.rs
@@ -13,5 +13,9 @@
 // `#![macro_escape]` is incompatible with crate-level `#![macro_use]`
 // already present in issue-43106-gating-of-builtin-attrs.
 
+// must-compile-successfully
+
 #![macro_escape]
 //~^ WARN macro_escape is a deprecated synonym for macro_use
+
+fn main() {}
diff --git a/src/test/ui/feature-gate/issue-43106-gating-of-macro_escape.stderr b/src/test/ui/feature-gate/issue-43106-gating-of-macro_escape.stderr
index d1d37720a55db..d19720397e66d 100644
--- a/src/test/ui/feature-gate/issue-43106-gating-of-macro_escape.stderr
+++ b/src/test/ui/feature-gate/issue-43106-gating-of-macro_escape.stderr
@@ -1,13 +1,8 @@
 warning: macro_escape is a deprecated synonym for macro_use
-  --> $DIR/issue-43106-gating-of-macro_escape.rs:16:1
+  --> $DIR/issue-43106-gating-of-macro_escape.rs:18:1
    |
 LL | #![macro_escape]
    | ^^^^^^^^^^^^^^^^
    |
    = help: consider an outer attribute, #[macro_use] mod ...
 
-error[E0601]: main function not found
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0601`.
diff --git a/src/test/ui/feature-gate/issue-43106-gating-of-proc_macro_derive.rs b/src/test/ui/feature-gate/issue-43106-gating-of-proc_macro_derive.rs
index 133f70e0f3b19..5bb8bb024ed51 100644
--- a/src/test/ui/feature-gate/issue-43106-gating-of-proc_macro_derive.rs
+++ b/src/test/ui/feature-gate/issue-43106-gating-of-proc_macro_derive.rs
@@ -40,3 +40,5 @@ mod proc_macro_derive2 {
     #[proc_macro_derive = "2500"] impl S { }
     //~^ ERROR the `#[proc_macro_derive]` attribute may only be used on bare functions
 }
+
+fn main() {}
diff --git a/src/test/ui/feature-gate/issue-43106-gating-of-proc_macro_derive.stderr b/src/test/ui/feature-gate/issue-43106-gating-of-proc_macro_derive.stderr
index c7654a3f258c9..419efb6825a97 100644
--- a/src/test/ui/feature-gate/issue-43106-gating-of-proc_macro_derive.stderr
+++ b/src/test/ui/feature-gate/issue-43106-gating-of-proc_macro_derive.stderr
@@ -34,8 +34,5 @@ error: the `#[proc_macro_derive]` attribute may only be used on bare functions
 LL |     #[proc_macro_derive = "2500"] impl S { }
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-error[E0601]: main function not found
+error: aborting due to 6 previous errors
 
-error: aborting due to 7 previous errors
-
-For more information about this error, try `rustc --explain E0601`.
diff --git a/src/test/ui/feature-gate/issue-43106-gating-of-rustc_deprecated.rs b/src/test/ui/feature-gate/issue-43106-gating-of-rustc_deprecated.rs
index 10c1398634923..0c6cfb5da565c 100644
--- a/src/test/ui/feature-gate/issue-43106-gating-of-rustc_deprecated.rs
+++ b/src/test/ui/feature-gate/issue-43106-gating-of-rustc_deprecated.rs
@@ -36,3 +36,4 @@ mod rustc_deprecated {
     //~^ ERROR stability attributes may not be used outside of the standard library
 }
 
+fn main() {}
diff --git a/src/test/ui/feature-gate/issue-43106-gating-of-rustc_deprecated.stderr b/src/test/ui/feature-gate/issue-43106-gating-of-rustc_deprecated.stderr
index 5a1dd706ff3c9..35c15cb6b1ea8 100644
--- a/src/test/ui/feature-gate/issue-43106-gating-of-rustc_deprecated.stderr
+++ b/src/test/ui/feature-gate/issue-43106-gating-of-rustc_deprecated.stderr
@@ -1,5 +1,3 @@
-error[E0601]: main function not found
-
 error: stability attributes may not be used outside of the standard library
   --> $DIR/issue-43106-gating-of-rustc_deprecated.rs:17:1
    |
@@ -42,6 +40,5 @@ error: stability attributes may not be used outside of the standard library
 LL |     #[rustc_deprecated = "1500"] impl S { }
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-error: aborting due to 8 previous errors
+error: aborting due to 7 previous errors
 
-For more information about this error, try `rustc --explain E0601`.
diff --git a/src/test/ui/feature-gate/issue-43106-gating-of-stable.rs b/src/test/ui/feature-gate/issue-43106-gating-of-stable.rs
index a6eaabf7a383e..6415243d0873e 100644
--- a/src/test/ui/feature-gate/issue-43106-gating-of-stable.rs
+++ b/src/test/ui/feature-gate/issue-43106-gating-of-stable.rs
@@ -35,3 +35,5 @@ mod stable {
     #[stable = "1300"] impl S { }
     //~^ ERROR stability attributes may not be used outside of the standard library
 }
+
+fn main() {}
diff --git a/src/test/ui/feature-gate/issue-43106-gating-of-stable.stderr b/src/test/ui/feature-gate/issue-43106-gating-of-stable.stderr
index bee9b8e968200..21543d1b20afc 100644
--- a/src/test/ui/feature-gate/issue-43106-gating-of-stable.stderr
+++ b/src/test/ui/feature-gate/issue-43106-gating-of-stable.stderr
@@ -1,5 +1,3 @@
-error[E0601]: main function not found
-
 error: stability attributes may not be used outside of the standard library
   --> $DIR/issue-43106-gating-of-stable.rs:17:1
    |
@@ -42,6 +40,5 @@ error: stability attributes may not be used outside of the standard library
 LL |     #[stable = "1300"] impl S { }
    |     ^^^^^^^^^^^^^^^^^^
 
-error: aborting due to 8 previous errors
+error: aborting due to 7 previous errors
 
-For more information about this error, try `rustc --explain E0601`.
diff --git a/src/test/ui/feature-gate/issue-43106-gating-of-test.rs b/src/test/ui/feature-gate/issue-43106-gating-of-test.rs
index adcbfe77280b7..06632396249a5 100644
--- a/src/test/ui/feature-gate/issue-43106-gating-of-test.rs
+++ b/src/test/ui/feature-gate/issue-43106-gating-of-test.rs
@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// error-pattern: main function not found
+// error-pattern: `main` function not found
 
 // At time of authorship, crate-level #[test] attribute with no
 // `--test` signals unconditional error complaining of missing main
diff --git a/src/test/ui/feature-gate/issue-43106-gating-of-test.stderr b/src/test/ui/feature-gate/issue-43106-gating-of-test.stderr
index f9f1cce91f1c7..2ab35be43c576 100644
--- a/src/test/ui/feature-gate/issue-43106-gating-of-test.stderr
+++ b/src/test/ui/feature-gate/issue-43106-gating-of-test.stderr
@@ -1,4 +1,6 @@
-error[E0601]: main function not found
+error[E0601]: `main` function not found in crate `issue_43106_gating_of_test`
+   |
+   = note: consider adding a `main` function to `$DIR/issue-43106-gating-of-test.rs`
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gate/issue-43106-gating-of-unstable.rs b/src/test/ui/feature-gate/issue-43106-gating-of-unstable.rs
index ff0600deb1936..140474d82c88d 100644
--- a/src/test/ui/feature-gate/issue-43106-gating-of-unstable.rs
+++ b/src/test/ui/feature-gate/issue-43106-gating-of-unstable.rs
@@ -35,3 +35,5 @@ mod unstable {
     #[unstable = "1200"] impl S { }
     //~^ ERROR stability attributes may not be used outside of the standard library
 }
+
+fn main() {}
diff --git a/src/test/ui/feature-gate/issue-43106-gating-of-unstable.stderr b/src/test/ui/feature-gate/issue-43106-gating-of-unstable.stderr
index 970cc2f2a349d..6124e16f41804 100644
--- a/src/test/ui/feature-gate/issue-43106-gating-of-unstable.stderr
+++ b/src/test/ui/feature-gate/issue-43106-gating-of-unstable.stderr
@@ -1,5 +1,3 @@
-error[E0601]: main function not found
-
 error: stability attributes may not be used outside of the standard library
   --> $DIR/issue-43106-gating-of-unstable.rs:17:1
    |
@@ -42,6 +40,5 @@ error: stability attributes may not be used outside of the standard library
 LL |     #[unstable = "1200"] impl S { }
    |     ^^^^^^^^^^^^^^^^^^^^
 
-error: aborting due to 8 previous errors
+error: aborting due to 7 previous errors
 
-For more information about this error, try `rustc --explain E0601`.
diff --git a/src/test/ui/generator/yield-in-const.rs b/src/test/ui/generator/yield-in-const.rs
index e166d26515975..8636a66ae00ae 100644
--- a/src/test/ui/generator/yield-in-const.rs
+++ b/src/test/ui/generator/yield-in-const.rs
@@ -12,3 +12,5 @@
 
 const A: u8 = { yield 3u8; 3u8};
 //~^ ERROR yield statement outside
+
+fn main() {}
diff --git a/src/test/ui/generator/yield-in-const.stderr b/src/test/ui/generator/yield-in-const.stderr
index 41a20893f5c46..874edce593168 100644
--- a/src/test/ui/generator/yield-in-const.stderr
+++ b/src/test/ui/generator/yield-in-const.stderr
@@ -1,12 +1,9 @@
-error[E0601]: main function not found
-
 error[E0627]: yield statement outside of generator literal
   --> $DIR/yield-in-const.rs:13:17
    |
 LL | const A: u8 = { yield 3u8; 3u8};
    |                 ^^^^^^^^^
 
-error: aborting due to 2 previous errors
+error: aborting due to previous error
 
-Some errors occurred: E0601, E0627.
-For more information about an error, try `rustc --explain E0601`.
+For more information about this error, try `rustc --explain E0627`.
diff --git a/src/test/ui/generator/yield-in-static.rs b/src/test/ui/generator/yield-in-static.rs
index 823a2aa425e2c..21601f47f677d 100644
--- a/src/test/ui/generator/yield-in-static.rs
+++ b/src/test/ui/generator/yield-in-static.rs
@@ -12,3 +12,5 @@
 
 static B: u8 = { yield 3u8; 3u8};
 //~^ ERROR yield statement outside
+
+fn main() {}
diff --git a/src/test/ui/generator/yield-in-static.stderr b/src/test/ui/generator/yield-in-static.stderr
index 71ebc189035a5..35d1ebaabdc1c 100644
--- a/src/test/ui/generator/yield-in-static.stderr
+++ b/src/test/ui/generator/yield-in-static.stderr
@@ -1,12 +1,9 @@
-error[E0601]: main function not found
-
 error[E0627]: yield statement outside of generator literal
   --> $DIR/yield-in-static.rs:13:18
    |
 LL | static B: u8 = { yield 3u8; 3u8};
    |                  ^^^^^^^^^
 
-error: aborting due to 2 previous errors
+error: aborting due to previous error
 
-Some errors occurred: E0601, E0627.
-For more information about an error, try `rustc --explain E0601`.
+For more information about this error, try `rustc --explain E0627`.
diff --git a/src/test/ui/imports/macro-paths.rs b/src/test/ui/imports/macro-paths.rs
index 88a6e1c0d92e6..e709eeee14a84 100644
--- a/src/test/ui/imports/macro-paths.rs
+++ b/src/test/ui/imports/macro-paths.rs
@@ -36,3 +36,5 @@ fn g() {
         mod baz { pub use two_macros::m; }
     }
 }
+
+fn main() {}
diff --git a/src/test/ui/imports/macro-paths.stderr b/src/test/ui/imports/macro-paths.stderr
index 1422fb0904d0c..799e7f972464b 100644
--- a/src/test/ui/imports/macro-paths.stderr
+++ b/src/test/ui/imports/macro-paths.stderr
@@ -36,9 +36,6 @@ LL | | }
    | |_^
    = note: macro-expanded items do not shadow when used in a macro invocation path
 
-error[E0601]: main function not found
+error: aborting due to 2 previous errors
 
-error: aborting due to 3 previous errors
-
-Some errors occurred: E0601, E0659.
-For more information about an error, try `rustc --explain E0601`.
+For more information about this error, try `rustc --explain E0659`.
diff --git a/src/test/ui/imports/macros.rs b/src/test/ui/imports/macros.rs
index 98577d73ee0f6..5d6a11913849a 100644
--- a/src/test/ui/imports/macros.rs
+++ b/src/test/ui/imports/macros.rs
@@ -49,3 +49,5 @@ mod m4 {
     use two_macros::m;
     m!(); //~ ERROR ambiguous
 }
+
+fn main() {}
diff --git a/src/test/ui/imports/macros.stderr b/src/test/ui/imports/macros.stderr
index d74020ecab298..f91987cd9f340 100644
--- a/src/test/ui/imports/macros.stderr
+++ b/src/test/ui/imports/macros.stderr
@@ -51,9 +51,6 @@ LL |     use two_macros::m;
    |         ^^^^^^^^^^^^^
    = note: macro-expanded macro imports do not shadow
 
-error[E0601]: main function not found
+error: aborting due to 3 previous errors
 
-error: aborting due to 4 previous errors
-
-Some errors occurred: E0601, E0659.
-For more information about an error, try `rustc --explain E0601`.
+For more information about this error, try `rustc --explain E0659`.
diff --git a/src/test/ui/in-band-lifetimes/mismatched_trait_impl-2.rs b/src/test/ui/in-band-lifetimes/mismatched_trait_impl-2.rs
index f845762cefd8b..ff04cfe99c0bc 100644
--- a/src/test/ui/in-band-lifetimes/mismatched_trait_impl-2.rs
+++ b/src/test/ui/in-band-lifetimes/mismatched_trait_impl-2.rs
@@ -20,3 +20,5 @@ impl Deref for Struct {
     }
 }
 //~^^^^ ERROR cannot infer an appropriate lifetime for lifetime parameter
+
+fn main() {}
diff --git a/src/test/ui/in-band-lifetimes/mismatched_trait_impl-2.stderr b/src/test/ui/in-band-lifetimes/mismatched_trait_impl-2.stderr
index a3d05e72ed9f5..37b586e1e3bd0 100644
--- a/src/test/ui/in-band-lifetimes/mismatched_trait_impl-2.stderr
+++ b/src/test/ui/in-band-lifetimes/mismatched_trait_impl-2.stderr
@@ -1,5 +1,3 @@
-error[E0601]: main function not found
-
 error[E0495]: cannot infer an appropriate lifetime for lifetime parameter in generic type due to conflicting requirements
   --> $DIR/mismatched_trait_impl-2.rs:18:5
    |
@@ -18,7 +16,6 @@ LL | |     }
            expected fn(&Struct) -> &Trait + 'static
               found fn(&Struct) -> &Trait
 
-error: aborting due to 2 previous errors
+error: aborting due to previous error
 
-Some errors occurred: E0495, E0601.
-For more information about an error, try `rustc --explain E0495`.
+For more information about this error, try `rustc --explain E0495`.
diff --git a/src/test/ui/issue-47706-trait.rs b/src/test/ui/issue-47706-trait.rs
index 86a9da49a054a..4ce653547da03 100644
--- a/src/test/ui/issue-47706-trait.rs
+++ b/src/test/ui/issue-47706-trait.rs
@@ -14,3 +14,5 @@ trait T {
     }
     //~^^ ERROR function is expected to take a single 0-tuple as argument
 }
+
+fn main() {}
diff --git a/src/test/ui/issue-47706-trait.stderr b/src/test/ui/issue-47706-trait.stderr
index 542ba50178067..717b3eb0b5625 100644
--- a/src/test/ui/issue-47706-trait.stderr
+++ b/src/test/ui/issue-47706-trait.stderr
@@ -1,5 +1,3 @@
-error[E0601]: main function not found
-
 error[E0593]: function is expected to take a single 0-tuple as argument, but it takes 2 distinct arguments
   --> $DIR/issue-47706-trait.rs:13:20
    |
@@ -8,7 +6,6 @@ LL |     fn f(&self, _: ()) {
 LL |         None::<()>.map(Self::f);
    |                    ^^^ expected function that takes a single 0-tuple as argument
 
-error: aborting due to 2 previous errors
+error: aborting due to previous error
 
-Some errors occurred: E0593, E0601.
-For more information about an error, try `rustc --explain E0593`.
+For more information about this error, try `rustc --explain E0593`.
diff --git a/src/test/ui/main-wrong-location.stderr b/src/test/ui/main-wrong-location.stderr
index aad68de9ec794..a5ef92f14bbc5 100644
--- a/src/test/ui/main-wrong-location.stderr
+++ b/src/test/ui/main-wrong-location.stderr
@@ -1,4 +1,4 @@
-error[E0601]: main function not found
+error[E0601]: `main` function not found in crate `main_wrong_location`
    |
    = note: the main function must be defined at the crate level but you have one or more functions named 'main' that are not defined at the crate level. Either move the definition or attach the `#[main]` attribute to override this behavior.
 note: here is a function named 'main'
diff --git a/src/test/ui/missing-items/m2.rs b/src/test/ui/missing-items/m2.rs
index 9f1954526916f..f655047f6f5ac 100644
--- a/src/test/ui/missing-items/m2.rs
+++ b/src/test/ui/missing-items/m2.rs
@@ -18,3 +18,5 @@ struct X {
 
 impl m1::X for X { //~ ERROR not all trait items implemented
 }
+
+fn main() {}
diff --git a/src/test/ui/missing-items/m2.stderr b/src/test/ui/missing-items/m2.stderr
index 1e4b47b44fabd..3f7a4039eb76b 100644
--- a/src/test/ui/missing-items/m2.stderr
+++ b/src/test/ui/missing-items/m2.stderr
@@ -1,5 +1,3 @@
-error[E0601]: main function not found
-
 error[E0046]: not all trait items implemented, missing: `CONSTANT`, `Type`, `method`
   --> $DIR/m2.rs:19:1
    |
@@ -10,7 +8,6 @@ LL | impl m1::X for X { //~ ERROR not all trait items implemented
    = note: `Type` from trait: `type Type;`
    = note: `method` from trait: `fn(&Self, std::string::String) -> <Self as m1::X>::Type`
 
-error: aborting due to 2 previous errors
+error: aborting due to previous error
 
-Some errors occurred: E0046, E0601.
-For more information about an error, try `rustc --explain E0046`.
+For more information about this error, try `rustc --explain E0046`.
diff --git a/src/test/ui/resolve/issue-14254.rs b/src/test/ui/resolve/issue-14254.rs
index 896085329ab94..eab500de25569 100644
--- a/src/test/ui/resolve/issue-14254.rs
+++ b/src/test/ui/resolve/issue-14254.rs
@@ -111,3 +111,5 @@ impl Foo for Box<isize> {
         //~^ ERROR cannot find value `bah`
     }
 }
+
+fn main() {}
diff --git a/src/test/ui/resolve/issue-14254.stderr b/src/test/ui/resolve/issue-14254.stderr
index 325e885084529..055cbb2d57916 100644
--- a/src/test/ui/resolve/issue-14254.stderr
+++ b/src/test/ui/resolve/issue-14254.stderr
@@ -142,9 +142,6 @@ error[E0425]: cannot find value `bah` in this scope
 LL |         bah;
    |         ^^^ help: try: `Self::bah`
 
-error[E0601]: main function not found
+error: aborting due to 24 previous errors
 
-error: aborting due to 25 previous errors
-
-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`.
diff --git a/src/test/ui/resolve/issue-21221-2.rs b/src/test/ui/resolve/issue-21221-2.rs
index 4ddb4d669fcd2..361e8caf7442e 100644
--- a/src/test/ui/resolve/issue-21221-2.rs
+++ b/src/test/ui/resolve/issue-21221-2.rs
@@ -27,3 +27,5 @@ pub mod baz {
 struct Foo;
 impl T for Foo { }
 //~^ ERROR cannot find trait `T`
+
+fn main() {}
diff --git a/src/test/ui/resolve/issue-21221-2.stderr b/src/test/ui/resolve/issue-21221-2.stderr
index 50781d4379272..c61ffe3b33e8a 100644
--- a/src/test/ui/resolve/issue-21221-2.stderr
+++ b/src/test/ui/resolve/issue-21221-2.stderr
@@ -8,7 +8,5 @@ help: possible candidate is found in another module, you can import it into scop
 LL | use foo::bar::T;
    |
 
-error[E0601]: main function not found
-
 error: cannot continue compilation due to previous error
 
diff --git a/src/test/ui/resolve/suggest-path-instead-of-mod-dot-item.rs b/src/test/ui/resolve/suggest-path-instead-of-mod-dot-item.rs
index 981a853a04056..d24fced5d313f 100644
--- a/src/test/ui/resolve/suggest-path-instead-of-mod-dot-item.rs
+++ b/src/test/ui/resolve/suggest-path-instead-of-mod-dot-item.rs
@@ -65,3 +65,5 @@ fn h8() -> i32 {
     a::b()
     //~^ ERROR expected function, found module `a::b`
 }
+
+fn main() {}
diff --git a/src/test/ui/resolve/suggest-path-instead-of-mod-dot-item.stderr b/src/test/ui/resolve/suggest-path-instead-of-mod-dot-item.stderr
index 263319f2ffa9e..9216c0b321929 100644
--- a/src/test/ui/resolve/suggest-path-instead-of-mod-dot-item.stderr
+++ b/src/test/ui/resolve/suggest-path-instead-of-mod-dot-item.stderr
@@ -72,9 +72,6 @@ LL |     a::b()
    |        |
    |        did you mean `I`?
 
-error[E0601]: main function not found
+error: aborting due to 9 previous errors
 
-error: aborting due to 10 previous errors
-
-Some errors occurred: E0423, E0601.
-For more information about an error, try `rustc --explain E0423`.
+For more information about this error, try `rustc --explain E0423`.
diff --git a/src/test/ui/span/issue-35987.rs b/src/test/ui/span/issue-35987.rs
index fa0410686c26c..19e05f33825f7 100644
--- a/src/test/ui/span/issue-35987.rs
+++ b/src/test/ui/span/issue-35987.rs
@@ -20,3 +20,5 @@ impl<T: Clone, Add> Add for Foo<T> {
         unimplemented!();
     }
 }
+
+fn main() {}
diff --git a/src/test/ui/span/issue-35987.stderr b/src/test/ui/span/issue-35987.stderr
index d3267d0cc1579..2d4a7cc72f5f6 100644
--- a/src/test/ui/span/issue-35987.stderr
+++ b/src/test/ui/span/issue-35987.stderr
@@ -8,7 +8,5 @@ help: possible better candidate is found in another module, you can import it in
 LL | use std::ops::Add;
    |
 
-error[E0601]: main function not found
-
 error: cannot continue compilation due to previous error
 
diff --git a/src/test/ui/token/issue-10636-2.rs b/src/test/ui/token/issue-10636-2.rs
index 4aa4127019378..711803754408f 100644
--- a/src/test/ui/token/issue-10636-2.rs
+++ b/src/test/ui/token/issue-10636-2.rs
@@ -17,3 +17,5 @@ pub fn trace_option(option: Option<isize>) {
 
 } //~ ERROR: incorrect close delimiter
 //~^ ERROR: expected expression, found `)`
+
+fn main() {}
diff --git a/src/test/ui/token/issue-10636-2.stderr b/src/test/ui/token/issue-10636-2.stderr
index 4b672f31d3851..56a30423171da 100644
--- a/src/test/ui/token/issue-10636-2.stderr
+++ b/src/test/ui/token/issue-10636-2.stderr
@@ -22,8 +22,5 @@ error: expected expression, found `)`
 LL | } //~ ERROR: incorrect close delimiter
    | ^ expected expression
 
-error[E0601]: main function not found
+error: aborting due to 3 previous errors
 
-error: aborting due to 4 previous errors
-
-For more information about this error, try `rustc --explain E0601`.
diff --git a/src/test/ui/token/issue-41155.rs b/src/test/ui/token/issue-41155.rs
index 550a90fc6af26..7bd8506af90b9 100644
--- a/src/test/ui/token/issue-41155.rs
+++ b/src/test/ui/token/issue-41155.rs
@@ -11,3 +11,5 @@
 impl S { //~ ERROR cannot find type
     pub
 } //~ ERROR expected one of
+
+fn main() {}
diff --git a/src/test/ui/token/issue-41155.stderr b/src/test/ui/token/issue-41155.stderr
index 00155cc28734a..b56b95a8aafd7 100644
--- a/src/test/ui/token/issue-41155.stderr
+++ b/src/test/ui/token/issue-41155.stderr
@@ -12,9 +12,6 @@ error[E0412]: cannot find type `S` in this scope
 LL | impl S { //~ ERROR cannot find type
    |      ^ not found in this scope
 
-error[E0601]: main function not found
+error: aborting due to 2 previous errors
 
-error: aborting due to 3 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`.