Add test for resolve errors caused by mod with parse errors

Author: estebank

tests/ui/resolve/parse-error-resolve.rs

@@ -0,0 +1,7 @@
+mod parse_error;
+use parse_error::Canonical; //~ ERROR E0432
+
+fn main() {
+    let _ = "" + 1; //~ ERROR E0369
+    parse_error::Canonical.foo(); //~ ERROR E0425
+}

tests/ui/resolve/parse-error-resolve.stderr

@@ -0,0 +1,35 @@
+error: expected one of `+`, `,`, `::`, `=`, or `>`, found `From`
+ --> $DIR/parse_error.rs:2:46
+  |
+2 | impl<S: Into<std::borrow::Cow<'static, str>> From<S> for Canonical { //~ ERROR expected
+  |                                              ^^^^ expected one of `+`, `,`, `::`, `=`, or `>`
+  |
+help: you might have meant to end the type parameters here
+  |
+2 | impl<S: Into<std::borrow::Cow<'static, str>>> From<S> for Canonical { //~ ERROR expected
+  |                                             +
+
+error[E0432]: unresolved import `parse_error::Canonical`
+ --> $DIR/parse-error-resolve.rs:2:5
+  |
+2 | use parse_error::Canonical; // ok, `parse_error.rs` has a parse error
+  |     ^^^^^^^^^^^^^^^^^^^^^^ no `Canonical` in `parse_error`
+
+error[E0425]: cannot find value `Canonical` in module `parse_error`
+ --> $DIR/parse-error-resolve.rs:6:18
+  |
+6 |     parse_error::Canonical.foo(); // ok, `parse_error.rs` has a parse error
+  |                  ^^^^^^^^^ not found in `parse_error`
+
+error[E0369]: cannot add `{integer}` to `&str`
+ --> $DIR/parse-error-resolve.rs:5:16
+  |
+5 |     let _ = "" + 1; //~ ERROR E0369
+  |             -- ^ - {integer}
+  |             |
+  |             &str
+
+error: aborting due to 4 previous errors
+
+Some errors have detailed explanations: E0369, E0425, E0432.
+For more information about an error, try `rustc --explain E0369`.

tests/ui/resolve/parse_error.rs

@@ -0,0 +1,5 @@
+struct Canonical;
+impl<S: Into<std::borrow::Cow<'static, str>> From<S> for Canonical { //~ ERROR expected
+    fn foo() {}
+}
+fn bar() {}

tests/ui/resolve/parse_error.stderr

@@ -0,0 +1,13 @@
+error: expected one of `+`, `,`, `::`, `=`, or `>`, found `From`
+  --> $DIR/parse_error.rs:2:46
+   |
+LL | impl<S: Into<std::borrow::Cow<'static, str>> From<S> for Canonical {
+   |                                              ^^^^ expected one of `+`, `,`, `::`, `=`, or `>`
+   |
+help: you might have meant to end the type parameters here
+   |
+LL | impl<S: Into<std::borrow::Cow<'static, str>>> From<S> for Canonical {
+   |                                             +
+
+error: aborting due to 1 previous error
+