A read on a closed pane's event ends ENOENT, and the pane cap is ENOSPC

9ns reads an error's words, not its errno: "window shut down" came out as
EIO where every other file of a gone pane gives ENOENT, and "no pane
slots" as EIO. The event and pty/data reads a pane closed under now say
"no such pane: its window shut" (ENOENT), and the cap says "no space for
a pane: 64 max" (ENOSPC; 9ns has no word for ENFILE).

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

1 files changed, 2 insertions, 2 deletions

diff --git a/src/pardes.zig b/src/pardes.zig
index f55654b6..a0b11566 100644
--- a/src/pardes.zig
+++ b/src/pardes.zig
@@ -2679,7 +2679,7 @@ test "a builtin that needs a pane reports capacity failure when every slot is fu
     };
     const help = std.meta.stringToEnum(Builtin, "Help") orelse return error.MissingHelpBuiltin;
     exec.runBuiltin(p, help, 0, "", null);
-    try std.testing.expect(std.mem.indexOf(u8, p.panes[0].?.msg[0..p.panes[0].?.msg_len], "help: no pane slots") != null);
+    try std.testing.expect(std.mem.indexOf(u8, p.panes[0].?.msg[0..p.panes[0].?.msg_len], "help: no space for a pane") != null);
 }
 
 test "Font keeps requested and acknowledged faces as separate plain state" {
@@ -5316,7 +5316,7 @@ pub const Pardes = struct {
         p.raw_hover_intent = false;
         look.cancelLookHover(p);
         const reply = ctlfs.handle(p, req);
-        if (reply.status == .err and (req.op == .write or req.op == .setattr or (req.op == .open and reply.errno == ctlfs.E.NFILE) or (req.op == .release and req.remove))) ctlfs.events.noteError(p, req, reply);
+        if (reply.status == .err and (req.op == .write or req.op == .setattr or (req.op == .open and reply.errno == ctlfs.E.NOSPC) or (req.op == .release and req.remove))) ctlfs.events.noteError(p, req, reply);
         // The request was a whole step of its own, so it settles the way a
         // step does: the cursor and scroll reconciled, the scripted panes
         // told, and the panes it made announced to /log now rather than at