Rollup merge of #59859 - davidtwco:issue-59756, r=cramertj

Suggest removing `?` to resolve type errors.

Fixes #59756.

src/test/ui/issue-59756.fixed

@@ -0,0 +1,17 @@
+// run-rustfix
+
+#![allow(warnings)]
+
+struct A;
+struct B;
+
+fn foo() -> Result<A, B> {
+    Ok(A)
+}
+
+fn bar() -> Result<A, B> {
+    foo()
+    //~^ ERROR try expression alternatives have incompatible types [E0308]
+}
+
+fn main() {}

src/test/ui/issue-59756.rs

@@ -0,0 +1,17 @@
+// run-rustfix
+
+#![allow(warnings)]
+
+struct A;
+struct B;
+
+fn foo() -> Result<A, B> {
+    Ok(A)
+}
+
+fn bar() -> Result<A, B> {
+    foo()?
+    //~^ ERROR try expression alternatives have incompatible types [E0308]
+}
+
+fn main() {}

src/test/ui/issue-59756.stderr

@@ -0,0 +1,15 @@
+error[E0308]: try expression alternatives have incompatible types
+  --> $DIR/issue-59756.rs:13:5
+   |
+LL |     foo()?
+   |     ^^^^^-
+   |     |    |
+   |     |    help: try removing this `?`
+   |     expected enum `std::result::Result`, found struct `A`
+   |
+   = note: expected type `std::result::Result<A, B>`
+              found type `A`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0308`.

src/test/ui/issues/issue-51632-try-desugar-incompatible-types.stderr

@@ -2,7 +2,10 @@ error[E0308]: try expression alternatives have incompatible types
   --> $DIR/issue-51632-try-desugar-incompatible-types.rs:8:5
    |
 LL |     missing_discourses()?
-   |     ^^^^^^^^^^^^^^^^^^^^^ expected enum `std::result::Result`, found isize
+   |     ^^^^^^^^^^^^^^^^^^^^-
+   |     |                   |
+   |     |                   help: try removing this `?`
+   |     expected enum `std::result::Result`, found isize
    |
    = note: expected type `std::result::Result<isize, ()>`
               found type `isize`