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, 1 deletions

diff --git a/src/Messages.zig b/src/Messages.zig
index 7d284e6b..b197e715 100644
--- a/src/Messages.zig
+++ b/src/Messages.zig
@@ -446,7 +446,8 @@ pub fn messageLog(m: *const Messages, i: usize) ?*const LoggedMessage {
 
 /// `<operation>: <the error in words>`: FileNotFound reads "file not found".
 /// What a route that would open a pane says when every slot is taken.
-pub const no_pane_slots = "no pane slots: {d} max";
+/// "no space": 9ns's word for ENOSPC (it has none for ENFILE).
+pub const no_pane_slots = "no space for a pane: {d} max";
 
 pub fn reportError(p: *Pardes, id: usize, operation: []const u8, err: anyerror) void {
     var buf: [256]u8 = undefined;