refactor(resolve): clean up the early error return caused by non-call

Author: bvanjoi

compiler/rustc_resolve/src/late.rs

@@ -3528,10 +3528,6 @@ impl<'a: 'ast, 'b, 'ast, 'tcx> LateResolutionVisitor<'a, 'b, 'ast, 'tcx> {
         //
         // Similar thing, for types, happens in `report_errors` above.
         let report_errors_for_call = |this: &mut Self, parent_err: Spanned<ResolutionError<'a>>| {
-            if !source.is_call() {
-                return Some(parent_err);
-            }
-
             // Before we start looking for candidates, we have to get our hands
             // on the type user is trying to perform invocation on; basically:
             // we're transforming `HashMap::new` into just `HashMap`.

tests/ui/generic-associated-types/equality-bound.stderr

@@ -36,7 +36,10 @@ error[E0433]: failed to resolve: use of undeclared type `I`
   --> $DIR/equality-bound.rs:9:41
    |
 LL | fn sum3<J: Iterator>(i: J) -> i32 where I::Item = i32 {
-   |                                         ^ use of undeclared type `I`
+   |                                         ^
+   |                                         |
+   |                                         use of undeclared type `I`
+   |                                         help: a type parameter with a similar name exists: `J`
 
 error: aborting due to 4 previous errors
 

tests/ui/macros/builtin-prelude-no-accidents.stderr

@@ -4,18 +4,21 @@ error[E0433]: failed to resolve: use of undeclared crate or module `env`
 LL |     env::current_dir;
    |     ^^^ use of undeclared crate or module `env`
 
+error[E0433]: failed to resolve: use of undeclared crate or module `vec`
+  --> $DIR/builtin-prelude-no-accidents.rs:7:14
+   |
+LL |     type B = vec::Vec<u8>;
+   |              ^^^
+   |              |
+   |              use of undeclared crate or module `vec`
+   |              help: a struct with a similar name exists (notice the capitalization): `Vec`
+
 error[E0433]: failed to resolve: use of undeclared crate or module `panic`
   --> $DIR/builtin-prelude-no-accidents.rs:6:14
    |
 LL |     type A = panic::PanicInfo;
    |              ^^^^^ use of undeclared crate or module `panic`
 
-error[E0433]: failed to resolve: use of undeclared crate or module `vec`
-  --> $DIR/builtin-prelude-no-accidents.rs:7:14
-   |
-LL |     type B = vec::Vec<u8>;
-   |              ^^^ use of undeclared crate or module `vec`
-
 error: aborting due to 3 previous errors
 
 For more information about this error, try `rustc --explain E0433`.

tests/ui/parser/dyn-trait-compatibility.stderr

@@ -1,9 +1,3 @@
-error[E0433]: failed to resolve: use of undeclared crate or module `dyn`
-  --> $DIR/dyn-trait-compatibility.rs:3:11
-   |
-LL | type A1 = dyn::dyn;
-   |           ^^^ use of undeclared crate or module `dyn`
-
 error[E0412]: cannot find type `dyn` in this scope
   --> $DIR/dyn-trait-compatibility.rs:1:11
    |
@@ -46,6 +40,12 @@ error[E0412]: cannot find type `dyn` in this scope
 LL | type A3 = dyn<<dyn as dyn>::dyn>;
    |                ^^^ not found in this scope
 
+error[E0433]: failed to resolve: use of undeclared crate or module `dyn`
+  --> $DIR/dyn-trait-compatibility.rs:3:11
+   |
+LL | type A1 = dyn::dyn;
+   |           ^^^ use of undeclared crate or module `dyn`
+
 error: aborting due to 8 previous errors
 
 Some errors have detailed explanations: E0405, E0412, E0433.

tests/ui/pattern/pattern-error-continue.stderr

@@ -1,9 +1,3 @@
-error[E0433]: failed to resolve: use of undeclared type `E`
-  --> $DIR/pattern-error-continue.rs:33:9
-   |
-LL |         E::V => {}
-   |         ^ use of undeclared type `E`
-
 error[E0532]: expected tuple struct or tuple variant, found unit variant `A::D`
   --> $DIR/pattern-error-continue.rs:18:9
    |
@@ -56,6 +50,15 @@ note: function defined here
 LL | fn f(_c: char) {}
    |    ^ --------
 
+error[E0433]: failed to resolve: use of undeclared type `E`
+  --> $DIR/pattern-error-continue.rs:33:9
+   |
+LL |         E::V => {}
+   |         ^
+   |         |
+   |         use of undeclared type `E`
+   |         help: an enum with a similar name exists: `A`
+
 error: aborting due to 5 previous errors
 
 Some errors have detailed explanations: E0023, E0308, E0433, E0532.

tests/ui/resolve/issue-109250.rs

@@ -0,0 +1,3 @@
+fn main() {       //~ HELP consider importing
+    HashMap::new; //~ ERROR failed to resolve: use of undeclared type `HashMap`
+}

tests/ui/resolve/issue-109250.stderr

@@ -0,0 +1,14 @@
+error[E0433]: failed to resolve: use of undeclared type `HashMap`
+  --> $DIR/issue-109250.rs:2:5
+   |
+LL |     HashMap::new;
+   |     ^^^^^^^ use of undeclared type `HashMap`
+   |
+help: consider importing this struct
+   |
+LL + use std::collections::HashMap;
+   |
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0433`.

tests/ui/resolve/resolve-variant-assoc-item.stderr

@@ -3,12 +3,26 @@ error[E0433]: failed to resolve: `V` is a variant, not a module
    |
 LL |     E::V::associated_item;
    |        ^ `V` is a variant, not a module
+   |
+help: there is an enum variant `E::V`; try using the variant's enum
+   |
+LL |     E;
+   |     ~
 
 error[E0433]: failed to resolve: `V` is a variant, not a module
   --> $DIR/resolve-variant-assoc-item.rs:6:5
    |
 LL |     V::associated_item;
    |     ^ `V` is a variant, not a module
+   |
+help: there is an enum variant `E::V`; try using the variant's enum
+   |
+LL |     E;
+   |     ~
+help: an enum with a similar name exists
+   |
+LL |     E::associated_item;
+   |     ~
 
 error: aborting due to 2 previous errors
 

tests/ui/type/type-path-err-node-types.stderr

@@ -1,9 +1,3 @@
-error[E0433]: failed to resolve: use of undeclared type `NonExistent`
-  --> $DIR/type-path-err-node-types.rs:15:5
-   |
-LL |     NonExistent::Assoc::<u8>;
-   |     ^^^^^^^^^^^ use of undeclared type `NonExistent`
-
 error[E0412]: cannot find type `Nonexistent` in this scope
   --> $DIR/type-path-err-node-types.rs:7:12
    |
@@ -22,6 +16,12 @@ error[E0425]: cannot find value `nonexistent` in this scope
 LL |     nonexistent.nonexistent::<u8>();
    |     ^^^^^^^^^^^ not found in this scope
 
+error[E0433]: failed to resolve: use of undeclared type `NonExistent`
+  --> $DIR/type-path-err-node-types.rs:15:5
+   |
+LL |     NonExistent::Assoc::<u8>;
+   |     ^^^^^^^^^^^ use of undeclared type `NonExistent`
+
 error[E0282]: type annotations needed
   --> $DIR/type-path-err-node-types.rs:23:14
    |