A word at /tagexec or a column's exec that makes, acts on and focuses no pane reads back nothing

Newcol written to /tagexec read back `1`, the pane with the keyboard, which
the word never touched. That was a pane word's fallback (a pane's exec
answers the pane it ran at) applied to a tag no pane owns. A word in a
column's or the workspace's tag now answers the pane it made, refilled, went
to or focused, and otherwise nothing.

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

1 files changed, 6 insertions, 0 deletions

diff --git a/src/ninep/ctl.zig b/src/ninep/ctl.zig
index d6230308..d86d6047 100644
--- a/src/ninep/ctl.zig
+++ b/src/ninep/ctl.zig
@@ -93,6 +93,12 @@ pub fn run(p: *Pardes, id: usize, exec: bool, text: []const u8, in_tag: bool) vo
     // touched.
     if (p.fs.refilled) |serial| if (p.paneBySerial(serial) != null) return noteResult(p, serial);
     if (went) |dst| if (p.panes[dst]) |pane| return noteResult(p, pane.serial);
+    // A word in a column's or the workspace's tag ran at no pane: it
+    // answers one only if it focused one (Newcol answers nothing).
+    if (p.exec_header) {
+        if (p.active != id) if (p.panes[p.active]) |pane| noteResult(p, pane.serial);
+        return;
+    }
     noteResult(p, if (exec) context else (p.panes[p.active] orelse return).serial);
 }