Continue to borrowck even if there were previous errors

compiler/rustc_parse/src/parser/expr.rs

@@ -2911,12 +2911,22 @@ impl<'a> Parser<'a> {
                 Ok(arm) => arms.push(arm),
                 Err(e) => {
                     // Recover by skipping to the end of the block.
-                    e.emit();
+                    let guar = e.emit();
                     self.recover_stmt();
                     let span = lo.to(self.token.span);
                     if self.token == token::CloseDelim(Delimiter::Brace) {
                         self.bump();
                     }
+                    // Always push at least one arm to make the match non-empty
+                    arms.push(Arm {
+                        attrs: Default::default(),
+                        pat: self.mk_pat(span, ast::PatKind::Err(guar)),
+                        guard: None,
+                        body: Some(self.mk_expr_err(span)),
+                        span,
+                        id: DUMMY_NODE_ID,
+                        is_placeholder: false,
+                    });
                     return Ok(self.mk_expr_with_attrs(
                         span,
                         ExprKind::Match(scrutinee, arms),