relays: create fresh dataspace at stdin relay

src/syndicate/relays.nim

@@ -323,6 +323,7 @@ when defined(posix):
 
   proc connectTransport(turn: var Turn; ds: Cap; ta: transportAddress.Stdio) =
     ## Connect to an external dataspace over stdio.
+    let localDataspace = newDataspace(turn)
     proc stdoutWriter(turn: var Turn; buf: seq[byte]) =
       ## Blocking write to stdout.
       let n = writeBytes(stdout, buf, 0, buf.len)
@@ -331,7 +332,7 @@ when defined(posix):
         stopActor(turn)
     var opts = RelayActorOptions(
         packetWriter: stdoutWriter,
-        initialCap: ds,
+        initialCap: localDataspace,
         initialOid: 0.Oid.some,
       )
     spawnRelay("stdio", turn, opts) do (turn: var Turn; relay: Relay):
@@ -351,7 +352,7 @@ when defined(posix):
       publish(turn, ds, TransportConnection(
           `addr`: ta.toPreserves,
           control: newCap(entity, turn),
-          resolved: relay.peer.accepted,
+          resolved: localDataspace.accepted,
         ))
 
   proc connectStdio*(turn: var Turn; ds: Cap) =