Do not issue E0071 if a type error has already been reported

src/test/ui/typeck/issue-88844.rs

@@ -0,0 +1,14 @@
+// Regression test for #88844.
+
+struct Struct { value: i32 }
+//~^ NOTE: similarly named struct `Struct` defined here
+
+impl Stuct {
+//~^ ERROR: cannot find type `Stuct` in this scope [E0412]
+//~| HELP: a struct with a similar name exists
+    fn new() -> Self {
+        Self { value: 42 }
+    }
+}
+
+fn main() {}

src/test/ui/typeck/issue-88844.stderr

@@ -0,0 +1,12 @@
+error[E0412]: cannot find type `Stuct` in this scope
+  --> $DIR/issue-88844.rs:6:6
+   |
+LL | struct Struct { value: i32 }
+   | ------------- similarly named struct `Struct` defined here
+...
+LL | impl Stuct {
+   |      ^^^^^ help: a struct with a similar name exists: `Struct`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0412`.