From b66de06d0e1fa8324542dcddb2ffd521c8380bc0 Mon Sep 17 00:00:00 2001
From: Antonio Scandurra <me@as-cii.com>
Date: Tue, 20 Jul 2021 11:30:00 +0200
Subject: [PATCH] Ensure that `WrapMap`'s input lines match `TabMap`'s output
 lines

---
 zed/src/editor/display_map/wrap_map.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/zed/src/editor/display_map/wrap_map.rs b/zed/src/editor/display_map/wrap_map.rs
index a567acb8b17ec5969501218edef9aa756b974d9b..d2b55c4345f0f9d08f50ac9abfef0e1465e9827a 100644
--- a/zed/src/editor/display_map/wrap_map.rs
+++ b/zed/src/editor/display_map/wrap_map.rs
@@ -387,6 +387,12 @@ impl BackgroundWrapper {
     fn check_invariants(&self) {
         #[cfg(debug_assertions)]
         {
+            let summary = self.snapshot.transforms.summary();
+            assert_eq!(
+                InputPoint::new(summary.input.lines.row, summary.input.lines.column),
+                self.snapshot.input.max_point()
+            );
+
             let mut transforms = self.snapshot.transforms.cursor::<(), ()>().peekable();
             while let Some(transform) = transforms.next() {
                 let next_transform = transforms.peek();