Don't suggest moving tuple structs with a significant drop to late evaluation.

clippy_utils/src/eager_or_lazy.rs

@@ -120,7 +120,7 @@ fn visit_expr(&mut self, e: &'tcx Expr<'_>) {
                             .expr_ty(e)
                             .has_significant_drop(self.cx.tcx, self.cx.param_env)
                         {
-                            self.eagerness = Lazy;
+                            self.eagerness = ForceNoChange;
                             return;
                         }
                     },

tests/ui/or_fun_call.fixed

@@ -225,4 +225,15 @@ mod issue8239 {
     }
 }
 
+mod issue9608 {
+    fn sig_drop() {
+        enum X {
+            X(std::fs::File),
+            Y(u32),
+        }
+
+        let _ = None.unwrap_or(X::Y(0));
+    }
+}
+
 fn main() {}

tests/ui/or_fun_call.rs

@@ -225,4 +225,15 @@ fn less_than_max_suggestion_highest_lines() {
     }
 }
 
+mod issue9608 {
+    fn sig_drop() {
+        enum X {
+            X(std::fs::File),
+            Y(u32),
+        }
+
+        let _ = None.unwrap_or(X::Y(0));
+    }
+}
+
 fn main() {}