1 files changed, 69 insertions, 0 deletions
diff --git a/tests/ui/confuse-field-and-method/issue-2392.rs b/tests/ui/confuse-field-and-method/issue-2392.rs
new file mode 100644
index 00000000000..8aef091fe31
--- /dev/null
+++ b/tests/ui/confuse-field-and-method/issue-2392.rs
@@ -0,0 +1,69 @@
+struct FuncContainer {
+    f1: fn(data: u8),
+    f2: extern "C" fn(data: u8),
+    f3: unsafe fn(data: u8),
+}
+
+struct FuncContainerOuter {
+    container: Box<FuncContainer>
+}
+
+struct Obj<F> where F: FnOnce() -> u32 {
+    closure: F,
+    not_closure: usize,
+}
+
+struct BoxedObj {
+    boxed_closure: Box<dyn FnOnce() -> u32>,
+}
+
+struct Wrapper<F> where F: FnMut() -> u32 {
+    wrap: Obj<F>,
+}
+
+fn func() -> u32 {
+    0
+}
+
+fn check_expression() -> Obj<Box<dyn FnOnce() -> u32>> {
+    Obj { closure: Box::new(|| 42_u32) as Box<dyn FnOnce() -> u32>, not_closure: 42 }
+}
+
+fn main() {
+    // test variations of function
+
+    let o_closure = Obj { closure: || 42, not_closure: 42 };
+    o_closure.closure(); //~ ERROR no method named `closure` found
+
+    o_closure.not_closure();
+    //~^ ERROR no method named `not_closure` found
+
+    let o_func = Obj { closure: func, not_closure: 5 };
+    o_func.closure(); //~ ERROR no method named `closure` found
+
+    let boxed_fn = BoxedObj { boxed_closure: Box::new(func) };
+    boxed_fn.boxed_closure();//~ ERROR no method named `boxed_closure` found
+
+    let boxed_closure = BoxedObj { boxed_closure: Box::new(|| 42_u32) as Box<dyn FnOnce() -> u32> };
+    boxed_closure.boxed_closure();//~ ERROR no method named `boxed_closure` found
+
+    // test expression writing in the notes
+
+    let w = Wrapper { wrap: o_func };
+    w.wrap.closure();//~ ERROR no method named `closure` found
+
+    w.wrap.not_closure();
+    //~^ ERROR no method named `not_closure` found
+
+    check_expression().closure();//~ ERROR no method named `closure` found
+}
+
+impl FuncContainerOuter {
+    fn run(&self) {
+        unsafe {
+            (*self.container).f1(1); //~ ERROR no method named `f1` found
+            (*self.container).f2(1); //~ ERROR no method named `f2` found
+            (*self.container).f3(1); //~ ERROR no method named `f3` found
+        }
+    }
+}