An unsaved pane restored from a dump that says nothing of its disk (no disk_hash, an older dump) asks at its first Save, as for a file changed on disk

What its text was read against is unknown, so a Save could write over
a newer file without a word; it now asks once first.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

1 files changed, 10 insertions, 0 deletions

diff --git a/src/File.zig b/src/File.zig
index d41007c3..4fac0073 100644
--- a/src/File.zig
+++ b/src/File.zig
@@ -953,6 +953,16 @@ pub fn restore(p: *Pardes, id: usize, src: dump.Pane) !*Pane {
             if (std.hash.Wyhash.hash(0, bytes) != read_against) changed(p, @intCast(id), bytes);
         } else |_| {}
     };
+    // An older dump says nothing of what the text was read against: its
+    // first Save asks, as for a file changed on disk, rather than guess.
+    if (saved.dirty and saved.disk_hash == null and output == null and onDisk(path)) {
+        if (filesystem.read(p, path)) |bytes| {
+            defer p.gpa.free(bytes);
+            const f = &pane.file.?;
+            f.disk_newer = std.hash.Wyhash.hash(0, bytes);
+            f.disk_newer_warned = false;
+        } else |_| {}
+    }
     return pane;
 }