A shell that exits under a run answers exit N, and the log says exit before del

A dogfood agent ran `exit 3` through pty/run: the reader got ENOENT, and
the log went straight to del. The hosts now read a shell's exit status at
its pty's end as they do a command's; a run waiting on the line answers
`exit 3` with what it printed, the log says `exit <serial> 3` before
the pane's `del`, and an open run still stats after its pane is gone
(cat fstats its input). Pins cloud9 f35b7ed, whose stat of an open fid names
its open. Writes to a gone pane's pty/data, held open or not, fail ENOENT.

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

1 files changed, 5 insertions, 7 deletions

diff --git a/src/gui/gui.zig b/src/gui/gui.zig
index 321c80b5..cac311e2 100644
--- a/src/gui/gui.zig
+++ b/src/gui/gui.zig
@@ -4057,15 +4057,13 @@ const Shell = struct {
                         host_io.commandEof(s.core, s.ptys, e.pane, s, closeWatched);
                         break :eof;
                     }
-                    // Unwatched, a command's exit is read here, as its end.
+                    // Unwatched, a command's exit is read here, as its end,
+                    // and a shell's, for a run waiting on it and the log.
                     const unwatched = if (s.core.panes[e.pane]) |pane| pane.command != null else false;
-                    var status: ?u8 = null;
-                    if (unwatched) {
-                        status = host_io.exitStatus(pt.pid, 100);
-                        if (status != null) pt.pid = 0; // reaped: no shell to retire
-                    }
+                    const status = host_io.exitStatus(pt.pid, 100);
+                    if (status != null) pt.pid = 0; // reaped: no shell to retire
                     s.closePty(e.pane);
-                    if (unwatched) s.core.update(.{ .exited = .{ .pane = e.pane, .status = status } });
+                    if (unwatched or status != null) s.core.update(.{ .exited = .{ .pane = e.pane, .status = status } });
                     s.core.update(.{ .eof = .{ .pane = e.pane } });
                 }
                 s.saw_event = true;