Auto merge of #78432 - sexxi-goose:fix-77993-take3, r=nikomatsakis

Handle type errors in closure/generator upvar_tys

Fixes #77993

src/test/ui/issues/issue-77993-1.rs

@@ -0,0 +1,12 @@
+#[derive(Clone)]
+struct InGroup<F> {
+    it: It,
+    //~^ ERROR cannot find type `It` in this scope
+    f: F,
+}
+fn dates_in_year() -> impl Clone {
+    InGroup { f: |d| d }
+    //~^ ERROR missing field `it` in initializer of `InGroup<_>`
+}
+
+fn main() {}

src/test/ui/issues/issue-77993-1.stderr

@@ -0,0 +1,16 @@
+error[E0412]: cannot find type `It` in this scope
+  --> $DIR/issue-77993-1.rs:3:9
+   |
+LL |     it: It,
+   |         ^^ not found in this scope
+
+error[E0063]: missing field `it` in initializer of `InGroup<_>`
+  --> $DIR/issue-77993-1.rs:8:5
+   |
+LL |     InGroup { f: |d| d }
+   |     ^^^^^^^ missing `it`
+
+error: aborting due to 2 previous errors
+
+Some errors have detailed explanations: E0063, E0412.
+For more information about an error, try `rustc --explain E0063`.

src/test/ui/issues/issue-77993-2.rs

@@ -0,0 +1,9 @@
+// edition:2018
+
+async fn test() -> Result<(), Box<dyn std::error::Error>> {
+    macro!();
+    //~^ ERROR expected identifier, found `!`
+    Ok(())
+}
+
+fn main() {}

src/test/ui/issues/issue-77993-2.stderr

@@ -0,0 +1,8 @@
+error: expected identifier, found `!`
+  --> $DIR/issue-77993-2.rs:4:10
+   |
+LL |     macro!();
+   |          ^ expected identifier
+
+error: aborting due to previous error
+