From 648afa1fd5b4c2eb74b4292b4eceeeb6d93016c1 Mon Sep 17 00:00:00 2001
From: Ogulcan Celik <ogulcancelik@gmail.com>
Date: Thu, 4 Jun 2026 16:32:43 +0300
Subject: fix: backport libghostty resize overflow fix

refs #465
---
 vendor/libghostty-vt/src/terminal/c/terminal.zig | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

(limited to 'vendor/libghostty-vt/src/terminal/c')

diff --git a/vendor/libghostty-vt/src/terminal/c/terminal.zig b/vendor/libghostty-vt/src/terminal/c/terminal.zig
index 5a5db2d6..39959f83 100644
--- a/vendor/libghostty-vt/src/terminal/c/terminal.zig
+++ b/vendor/libghostty-vt/src/terminal/c/terminal.zig
@@ -1005,6 +1005,29 @@ test "resize invalid value" {
     try testing.expectEqual(Result.invalid_value, resize(t, 80, 0, 9, 18));
 }
 
+test "resize shrinks both axes with cursor at bottom" {
+    var t: Terminal = null;
+    try testing.expectEqual(Result.success, new(
+        &lib.alloc.test_allocator,
+        &t,
+        .{
+            .cols = 80,
+            .rows = 24,
+            .max_scrollback = 0,
+        },
+    ));
+    defer free(t);
+
+    // CSI 24;1H parks the cursor on the bottom row.
+    const move = "\x1b[24;1H";
+    vt_write(t, move, move.len);
+
+    // Shrink both axes; pre-resize cursor.y sits past the new bottom row.
+    try testing.expectEqual(Result.success, resize(t, 79, 23, 8, 16));
+    try testing.expectEqual(79, t.?.terminal.cols);
+    try testing.expectEqual(23, t.?.terminal.rows);
+}
+
 test "mode_get and mode_set" {
     var t: Terminal = null;
     try testing.expectEqual(Result.success, new(
-- 
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