A Save refused for want of a name counts as a failure, so its announcement goes

A builtin that would open a prompt nobody can answer (Save with no name
on a scratch, through a ctl write) failed the write without saying a
failure, so the announcement rule missed it and `msg N Save` stayed.

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

1 files changed, 5 insertions, 0 deletions

diff --git a/src/ninep/ctl.zig b/src/ninep/ctl.zig
index 4f52d661..6a8a37be 100644
--- a/src/ninep/ctl.zig
+++ b/src/ninep/ctl.zig
@@ -1504,6 +1504,11 @@ test "a builtin's Verbose announcement is logged only when it succeeds, its fail
     const serial = serialOf(p);
     var want: [64]u8 = undefined;
     const said_exit = try std.fmt.bufPrint(&want, "msg {d} Exit\n", .{serial});
+    // A Save a ctl write gives no name to, on a scratch: refused, no Save.
+    const scratch = try th.newPane(p);
+    var said_save_buf: [64]u8 = undefined;
+    try testing.expectEqual(E.INVAL, wr(p, Node.of(scratch, .ctl), "Save\n").errno());
+    try testing.expect(!th.logHas(p, try std.fmt.bufPrint(&said_save_buf, "msg {d} Save\n", .{scratch})));
     // Refused as it runs, through a click: the write fails, and no Exit.
     const f = &p.panes[0].?.file.?;
     f.saved_revision = f.revision -% 1;