A name held for its newline that no newline could make good (a terminal's, a component over 255 bytes, a path too long) is refused by the write that held it, not at the close (monkey9p's close_runs_only_line_files; follows sswkwwvv)

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

1 files changed, 5 insertions, 0 deletions

diff --git a/src/ninep/tree.zig b/src/ninep/tree.zig
index b0ffdd68..1990d09e 100644
--- a/src/ninep/tree.zig
+++ b/src/ninep/tree.zig
@@ -1278,6 +1278,11 @@ fn writeLines(p: *Pardes, req: Req, target: Target) Reply {
     // its message is no whole line. An Edit block is whole when it closes.
     const end = ctl.completeEnd(p, o.pending.items);
     if (end == 0) {
+        if (target == .pane and target.pane.file == .name) if (pane.heldNameFault(p, target.pane.serial, o.pending.items)) |why| {
+            o.pending.clearRetainingCapacity();
+            o.discarding = true;
+            return failText(req.tag, E.INVAL, why);
+        };
         if (o.pending.items.len <= pending_cap) return .{ .tag = req.tag, .written = @intCast(req.data.len) };
         o.pending.clearRetainingCapacity();
         o.discarding = true;