Move to MaybeIncorrect when binding values

Author: ThibsG

clippy_lints/src/matches.rs

@@ -285,7 +285,8 @@ declare_clippy_lint! {
     ///
     /// **Why is this bad?** Readability and needless complexity.
     ///
-    /// **Known problems:** None.
+    /// **Known problems:**  Suggested replacements may be incorrect when `match`
+    /// is actually binding temporary value, bringing a 'dropped while borrowed' error.
     ///
     /// **Example:**
     /// ```rust
@@ -850,7 +851,7 @@ fn check_match_single_binding(cx: &LateContext<'_, '_>, ex: &Expr<'_>, arms: &[A
         },
     }
 
-    let mut applicability = Applicability::MachineApplicable;
+    let mut applicability = Applicability::MaybeIncorrect;
     match arms[0].pat.kind {
         PatKind::Binding(..) | PatKind::Tuple(_, _) | PatKind::Struct(..) => {
             span_lint_and_sugg(