Rollup merge of #64054 - estebank:unused-import-is-to-eager, r=petrochenkov

Always emit unresolved import errors and hide unused import lint

Fix https://github.com/rust-lang/rust/issues/63724.

r? @petrochenkov

6 files changed, 41 insertions, 11 deletions

diff --git a/src/test/ui/extenv/issue-55897.rs b/src/test/ui/extenv/issue-55897.rs
index c3975f6b925..64c4107e898 100644
--- a/src/test/ui/extenv/issue-55897.rs
+++ b/src/test/ui/extenv/issue-55897.rs
@@ -1,7 +1,7 @@
 use prelude::*; //~ ERROR unresolved import `prelude`
 
 mod unresolved_env {
-    use env;
+    use env; //~ ERROR unresolved import `env`
 
     include!(concat!(env!("NON_EXISTENT"), "/data.rs"));
     //~^ ERROR cannot determine resolution for the macro `env`
diff --git a/src/test/ui/extenv/issue-55897.stderr b/src/test/ui/extenv/issue-55897.stderr
index 9d68131beab..c57a467cdba 100644
--- a/src/test/ui/extenv/issue-55897.stderr
+++ b/src/test/ui/extenv/issue-55897.stderr
@@ -19,6 +19,12 @@ LL | use prelude::*;
    |     unresolved import
    |     help: a similar path exists: `std::prelude`
 
+error[E0432]: unresolved import `env`
+  --> $DIR/issue-55897.rs:4:9
+   |
+LL |     use env;
+   |         ^^^ no `env` in the root
+
 error: cannot determine resolution for the macro `env`
   --> $DIR/issue-55897.rs:6:22
    |
@@ -27,6 +33,6 @@ LL |     include!(concat!(env!("NON_EXISTENT"), "/data.rs"));
    |
    = note: import resolution is stuck, try simplifying macro imports
 
-error: aborting due to 4 previous errors
+error: aborting due to 5 previous errors
 
 For more information about this error, try `rustc --explain E0432`.
diff --git a/src/test/ui/imports/unresolved-imports-used.rs b/src/test/ui/imports/unresolved-imports-used.rs
index 5398dd63c89..75cf880192c 100644
--- a/src/test/ui/imports/unresolved-imports-used.rs
+++ b/src/test/ui/imports/unresolved-imports-used.rs
@@ -8,11 +8,11 @@ mod qux {
 
 use qux::quz;  //~ ERROR function `quz` is private
 use qux::bar;  //~ ERROR unresolved import `qux::bar`
-use foo::bar;
-use baz::*;
+use foo::bar;  //~ ERROR unresolved import `foo`
+use baz::*;    //~ ERROR unresolved import `baz`
 use qux::bar2; //~ ERROR unresolved import `qux::bar2`
-use foo2::bar2;
-use baz2::*;
+use foo2::bar2;//~ ERROR unresolved import `foo2`
+use baz2::*;   //~ ERROR unresolved import `baz2`
 use qux::quy;  //~ ERROR unused import
 
 fn main() {}
diff --git a/src/test/ui/imports/unresolved-imports-used.stderr b/src/test/ui/imports/unresolved-imports-used.stderr
index c9342d17a49..b341e8e0592 100644
--- a/src/test/ui/imports/unresolved-imports-used.stderr
+++ b/src/test/ui/imports/unresolved-imports-used.stderr
@@ -10,6 +10,30 @@ error[E0432]: unresolved import `qux::bar2`
 LL | use qux::bar2;
    |     ^^^^^^^^^ no `bar2` in `qux`
 
+error[E0432]: unresolved import `foo`
+  --> $DIR/unresolved-imports-used.rs:11:5
+   |
+LL | use foo::bar;
+   |     ^^^ maybe a missing crate `foo`?
+
+error[E0432]: unresolved import `baz`
+  --> $DIR/unresolved-imports-used.rs:12:5
+   |
+LL | use baz::*;
+   |     ^^^ maybe a missing crate `baz`?
+
+error[E0432]: unresolved import `foo2`
+  --> $DIR/unresolved-imports-used.rs:14:5
+   |
+LL | use foo2::bar2;
+   |     ^^^^ maybe a missing crate `foo2`?
+
+error[E0432]: unresolved import `baz2`
+  --> $DIR/unresolved-imports-used.rs:15:5
+   |
+LL | use baz2::*;
+   |     ^^^^ maybe a missing crate `baz2`?
+
 error[E0603]: function `quz` is private
   --> $DIR/unresolved-imports-used.rs:9:10
    |
@@ -28,7 +52,7 @@ note: lint level defined here
 LL | #![deny(unused_imports)]
    |         ^^^^^^^^^^^^^^
 
-error: aborting due to 4 previous errors
+error: aborting due to 8 previous errors
 
 Some errors have detailed explanations: E0432, E0603.
 For more information about an error, try `rustc --explain E0432`.
diff --git a/src/test/ui/rust-2018/uniform-paths/deadlock.rs b/src/test/ui/rust-2018/uniform-paths/deadlock.rs
index 3228d799083..83ed70a0459 100644
--- a/src/test/ui/rust-2018/uniform-paths/deadlock.rs
+++ b/src/test/ui/rust-2018/uniform-paths/deadlock.rs
@@ -1,7 +1,7 @@
 // edition:2018
 // compile-flags:--extern foo --extern bar
 
-use foo::bar; //~ ERROR unresolved import
+use foo::bar; //~ ERROR can't find crate for `foo`
 use bar::foo;
 
 fn main() {}
diff --git a/src/test/ui/rust-2018/uniform-paths/deadlock.stderr b/src/test/ui/rust-2018/uniform-paths/deadlock.stderr
index b4ac15c588e..9336e90afb7 100644
--- a/src/test/ui/rust-2018/uniform-paths/deadlock.stderr
+++ b/src/test/ui/rust-2018/uniform-paths/deadlock.stderr
@@ -1,9 +1,9 @@
-error[E0432]: unresolved import
+error[E0463]: can't find crate for `foo`
   --> $DIR/deadlock.rs:4:5
    |
 LL | use foo::bar;
-   |     ^^^^^^^^
+   |     ^^^ can't find crate
 
 error: aborting due to previous error
 
-For more information about this error, try `rustc --explain E0432`.
+For more information about this error, try `rustc --explain E0463`.