Handle ice-8850

Author: smoelius

tests/ui/crashes/ice-8850.fixed

@@ -0,0 +1,30 @@
+// run-rustfix
+#![allow(dead_code)]
+
+fn fn_pointer_static() -> usize {
+    static FN: fn() -> usize = || 1;
+    
+    FN() + 1
+}
+
+fn fn_pointer_const() -> usize {
+    const FN: fn() -> usize = || 1;
+    
+    FN() + 1
+}
+
+fn deref_to_dyn_fn() -> usize {
+    struct Derefs;
+    impl std::ops::Deref for Derefs {
+        type Target = dyn Fn() -> usize;
+
+        fn deref(&self) -> &Self::Target {
+            &|| 2
+        }
+    }
+    static FN: Derefs = Derefs;
+    
+    FN() + 1
+}
+
+fn main() {}

tests/ui/crashes/ice-8850.rs

@@ -1,3 +1,6 @@
+// run-rustfix
+#![allow(dead_code)]
+
 fn fn_pointer_static() -> usize {
     static FN: fn() -> usize = || 1;
     let res = FN() + 1;

tests/ui/crashes/ice-8850.stderr

@@ -1,5 +1,5 @@
 error: returning the result of a `let` binding from a block
-  --> $DIR/ice-8850.rs:4:5
+  --> $DIR/ice-8850.rs:7:5
    |
 LL |     let res = FN() + 1;
    |     ------------------- unnecessary `let` binding
@@ -14,7 +14,7 @@ LL ~     FN() + 1
    |
 
 error: returning the result of a `let` binding from a block
-  --> $DIR/ice-8850.rs:10:5
+  --> $DIR/ice-8850.rs:13:5
    |
 LL |     let res = FN() + 1;
    |     ------------------- unnecessary `let` binding
@@ -28,7 +28,7 @@ LL ~     FN() + 1
    |
 
 error: returning the result of a `let` binding from a block
-  --> $DIR/ice-8850.rs:24:5
+  --> $DIR/ice-8850.rs:27:5
    |
 LL |     let res = FN() + 1;
    |     ------------------- unnecessary `let` binding