A restored terminal's tag names neither the REPL it was nor the shell it had

A dump keeps a terminal's whole tag, and restoring read its tail from it
after the directory: the REPL id and Tty+fish, which were live facts and not
the tag's text, came back as a custom tail, so the tags said python-a over a
fresh shell bound to nothing. Restoring now sees through the id and the
shell in the Tty word, a default tail stays the default, and the new shell
names itself when it starts.

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

1 files changed, 19 insertions, 0 deletions

diff --git a/src/pardes.zig b/src/pardes.zig
index f8328289..43d8e94d 100644
--- a/src/pardes.zig
+++ b/src/pardes.zig
@@ -1544,6 +1544,25 @@ test "a REPL bound for a language takes the exec made on a body in it; tags, Exe
     try std.testing.expect(doc.repl == null);
 }
 
+test "a restored terminal's tag names neither the REPL it was nor the shell it had" {
+    const gpa = std.testing.allocator;
+    const p = try Pardes.init(gpa, .{ .tty_only = true });
+    defer p.deinit();
+    while (p.nextEffect()) |_| {}
+    p.acknowledgeShell(0, "/usr/bin/fish", true);
+    var host: FakeTtyQuery = .{};
+    host.install(p);
+    try std.testing.expect(p.executeBuiltinLine(0, "Repl python"));
+    try dump.dumpState(p);
+    const restored = try dump.restore(p, p.dump_out.?, "test");
+    defer restored.deinit();
+    const pane = restored.panes[0].?;
+    try std.testing.expect(pane.repl == null and pane.tag.own == null);
+    const shown = try tagline.tagText(restored, restored.scratch.allocator(), pane);
+    try std.testing.expect(std.mem.indexOf(u8, shown, "python-a") == null);
+    try std.testing.expect(std.mem.indexOf(u8, shown, "Tty+fish") == null);
+}
+
 test "Tty+fish, one word a tag can hold, opens a terminal on that shell" {
     const p = try Pardes.init(std.testing.allocator, .{ .tty_only = true });
     defer p.deinit();