An exec or Tty from a pane whose directory is a peer's path refuses before making any pane: `exec: <dir>: no such directory`, no `exit 127` pane left

A peer's directory (`/n/peer/x`) is no directory on this host, where the
shell starts, so a command there ran in a pane that could only say
`(pwd) exit 127`, and a Tty made a new/del pair. missingDir now counts
such a path missing, as it does a local directory that is not there.

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

1 files changed, 4 insertions, 1 deletions

diff --git a/src/exec.zig b/src/exec.zig
index 080d0aea..5b170375 100644
--- a/src/exec.zig
+++ b/src/exec.zig
@@ -440,7 +440,10 @@ fn refusedPlacement(p: *Pardes, id: usize) bool {
 pub fn missingDir(p: *Pardes, dir: []const u8) bool {
     if (comptime !hosted) return false;
     if (p.host.vtable.spawn == null) return false;
-    const local = @import("fs.zig").localPath(dir) orelse return false;
+    // A peer's directory (`/n/peer/x`) is no directory on this host, where
+    // the shell would start: no command or terminal runs there, and none
+    // is made to say `exit 127`.
+    const local = @import("fs.zig").localPath(dir) orelse return std.mem.startsWith(u8, dir, "/n/");
     return !isDirectory(local);
 }