Point at path segment on module not found

Point at the correct path segment on a import statement where a module
doesn't exist.

New output:

```rust
error[E0432]: unresolved import `std::bar`
 --> <anon>:1:10
  |
1 | use std::bar::{foo1, foo2};
  |          ^^^ Could not find `bar` in `std`
```

instead of:

```rust
error[E0432]: unresolved import `std::bar::foo1`
 --> <anon>:1:16
  |
1 | use std::bar::{foo1, foo2};
  |                ^^^^ Could not find `bar` in `std`

error[E0432]: unresolved import `std::bar::foo2`
 --> <anon>:1:22
  |
1 | use std::bar::{foo1, foo2};
  |                      ^^^^ Could not find `bar` in `std`
```

src/test/compile-fail/dollar-crate-is-keyword-2.rs

@@ -13,7 +13,7 @@ mod a {}
 macro_rules! m {
     () => {
         use a::$crate; //~ ERROR unresolved import `a::$crate`
-        use a::$crate::b; //~ ERROR unresolved import `a::$crate::b`
+        use a::$crate::b; //~ ERROR unresolved import `a::$crate`
         type A = a::$crate; //~ ERROR cannot find type `$crate` in module `a`
     }
 }

src/test/compile-fail/import2.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use baz::zed::bar; //~ ERROR unresolved import `baz::zed::bar` [E0432]
+use baz::zed::bar; //~ ERROR unresolved import `baz::zed` [E0432]
                    //~^ Could not find `zed` in `baz`
 
 mod baz {}

src/test/compile-fail/issue-1697.rs

@@ -10,7 +10,7 @@
 
 // Testing that we don't fail abnormally after hitting the errors
 
-use unresolved::*; //~ ERROR unresolved import `unresolved::*` [E0432]
+use unresolved::*; //~ ERROR unresolved import `unresolved` [E0432]
                    //~^ Maybe a missing `extern crate unresolved;`?
 
 fn main() {}

src/test/compile-fail/issue-30560.rs

@@ -10,10 +10,10 @@
 
 type Alias = ();
 use Alias::*;
-//~^ ERROR unresolved import `Alias::*` [E0432]
+//~^ ERROR unresolved import `Alias` [E0432]
 //~| Not a module `Alias`
 use std::io::Result::*;
-//~^ ERROR unresolved import `std::io::Result::*` [E0432]
+//~^ ERROR unresolved import `std::io::Result` [E0432]
 //~| Not a module `Result`
 
 trait T {}

src/test/compile-fail/issue-33464.rs

@@ -11,13 +11,10 @@
 // Make sure that the spans of import errors are correct.
 
 use abc::one_el;
-//~^ ERROR 13:5: 13:16
+//~^ ERROR 13:5: 13:8
 use abc::{a, bbb, cccccc};
-//~^ ERROR 15:11: 15:12
-//~^^ ERROR 15:14: 15:17
-//~^^^ ERROR 15:19: 15:25
+//~^ ERROR 15:5: 15:8
 use a_very_long_name::{el, el2};
-//~^ ERROR 19:24: 19:26
-//~^^ ERROR 19:28: 19:31
+//~^ ERROR 17:5: 17:21
 
 fn main() {}

src/test/compile-fail/resolve_self_super_hint.rs

@@ -13,19 +13,19 @@
 mod a {
     extern crate alloc;
     use alloc::HashMap;
-    //~^ ERROR unresolved import `alloc::HashMap` [E0432]
+    //~^ ERROR unresolved import `alloc` [E0432]
     //~| Did you mean `self::alloc`?
     mod b {
         use alloc::HashMap;
-        //~^ ERROR unresolved import `alloc::HashMap` [E0432]
+        //~^ ERROR unresolved import `alloc` [E0432]
         //~| Did you mean `a::alloc`?
         mod c {
             use alloc::HashMap;
-            //~^ ERROR unresolved import `alloc::HashMap` [E0432]
+            //~^ ERROR unresolved import `alloc` [E0432]
             //~| Did you mean `a::alloc`?
             mod d {
                 use alloc::HashMap;
-                //~^ ERROR unresolved import `alloc::HashMap` [E0432]
+                //~^ ERROR unresolved import `alloc` [E0432]
                 //~| Did you mean `a::alloc`?
             }
         }

src/test/compile-fail/super-at-top-level.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use super::f; //~ ERROR unresolved import `super::f` [E0432]
+use super::f; //~ ERROR unresolved import `super` [E0432]
               //~^ There are too many initial `super`s.
 
 fn main() {

src/test/compile-fail/unresolved-import.rs

@@ -10,7 +10,7 @@
 
 // ignore-tidy-linelength
 
-use foo::bar; //~ ERROR unresolved import `foo::bar` [E0432]
+use foo::bar; //~ ERROR unresolved import `foo` [E0432]
               //~^ Maybe a missing `extern crate foo;`?
 
 use bar::Baz as x; //~ ERROR unresolved import `bar::Baz` [E0432]
@@ -41,7 +41,7 @@ mod m {
         MyVariant
     }
 
-    use MyEnum::*; //~ ERROR unresolved import `MyEnum::*` [E0432]
+    use MyEnum::*; //~ ERROR unresolved import `MyEnum` [E0432]
                    //~^ Did you mean `self::MyEnum`?
 }
 
@@ -50,7 +50,7 @@ mod items {
         Variant
     }
 
-    use Enum::*; //~ ERROR unresolved import `Enum::*` [E0432]
+    use Enum::*; //~ ERROR unresolved import `Enum` [E0432]
                  //~^ Did you mean `self::Enum`?
 
     fn item() {}

src/test/compile-fail/use-from-trait-xc.rs

@@ -22,13 +22,13 @@ use use_from_trait_xc::Trait::CONST;
 //~^ ERROR `CONST` is not directly importable
 
 use use_from_trait_xc::Foo::new; //~ ERROR struct `Foo` is private
-//~^ ERROR unresolved import `use_from_trait_xc::Foo::new`
+//~^ ERROR unresolved import `use_from_trait_xc::Foo`
 
 use use_from_trait_xc::Foo::C; //~ ERROR struct `Foo` is private
-//~^ ERROR unresolved import `use_from_trait_xc::Foo::C`
+//~^ ERROR unresolved import `use_from_trait_xc::Foo`
 
 use use_from_trait_xc::Bar::new as bnew;
-//~^ ERROR unresolved import `use_from_trait_xc::Bar::new`
+//~^ ERROR unresolved import `use_from_trait_xc::Bar`
 
 use use_from_trait_xc::Baz::new as baznew;
 //~^ ERROR unresolved import `use_from_trait_xc::Baz::new`

src/test/compile-fail/use-from-trait.rs

@@ -17,11 +17,11 @@ use Trait::C;
 //~^ ERROR `C` is not directly importable
 
 use Foo::new;
-//~^ ERROR unresolved import `Foo::new` [E0432]
+//~^ ERROR unresolved import `Foo` [E0432]
 //~| Not a module `Foo`
 
 use Foo::C2;
-//~^ ERROR unresolved import `Foo::C2` [E0432]
+//~^ ERROR unresolved import `Foo` [E0432]
 //~| Not a module `Foo`
 
 pub trait Trait {

src/test/compile-fail/use-mod-4.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use foo::self; //~ ERROR unresolved import `foo::self`
+use foo::self; //~ ERROR unresolved import `foo`
 //~^ ERROR `self` imports are only allowed within a { } list
 
 use std::mem::self;

src/test/ui/macros/macro_path_as_generic_bound.stderr

@@ -2,7 +2,7 @@ error[E0433]: failed to resolve. Use of undeclared type or module `m`
   --> $DIR/macro_path_as_generic_bound.rs:17:6
    |
 17 | foo!(m::m2::A);
-   |      ^^^^^^^^ Use of undeclared type or module `m`
+   |      ^ Use of undeclared type or module `m`
 
 error: cannot continue compilation due to previous error
 

src/test/ui/span/non-existing-module-import.rs

@@ -0,0 +1,13 @@
+// Copyright 2017 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.
+
+use std::bar::{foo1, foo2};
+
+fn main() {}

src/test/ui/span/non-existing-module-import.stderr

@@ -0,0 +1,8 @@
+error[E0432]: unresolved import `std::bar`
+  --> $DIR/non-existing-module-import.rs:11:10
+   |
+11 | use std::bar::{foo1, foo2};
+   |          ^^^ Could not find `bar` in `std`
+
+error: aborting due to previous error
+