A failed Dump or a Restore of no dump fails its write, before any warning

A Dump into a DumpDir it could not write, or a Restore of a file that is
not a dump, answered a ctl write with rc 0 and only a message, and the
Restore warned about unsaved panes before it ever looked at the file. The
hosts' dump write now fails the waiting 9P write with EIO (the late failure
a Save uses), naming the path and the reason in the log, and Restore parses
the file before its unsaved-panes refusal, failing with `not a pardes
dump`.

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

1 files changed, 2 insertions, 2 deletions

diff --git a/src/detached/server.zig b/src/detached/server.zig
index 857591d4..8f45135a 100644
--- a/src/detached/server.zig
+++ b/src/detached/server.zig
@@ -569,8 +569,8 @@ pub const Session = struct {
     fn writeDump(ctx: ?*anyopaque, bytes: []const u8) void {
         const s = of(ctx);
         var pbuf: [1024:0]u8 = undefined;
-        const path = pardes.dump.outPath(&pbuf, s.core.settings.dump_dir.get()) orelse return;
-        filesystem.write(s.core, path, bytes) catch |err| return s.core.reportError(0, "dump", err);
+        const path = pardes.dump.outPath(&pbuf, s.core.settings.dump_dir.get()) orelse return s.core.dumpFailed(s.core.settings.dump_dir.get(), error.NoDumpDirectory);
+        filesystem.write(s.core, path, bytes) catch |err| return s.core.dumpFailed(path, err);
         s.core.setLastDump(path);
     }