aww, that fixes the sig issue

datastore/threadproxyds.nim

@@ -108,16 +108,13 @@ method put*(
       # wait for taskpool work to finish
       wait(sig).
         then(proc () =
-          # sig.decr()
-          os.sleep(400)
+          os.sleep(200)
           let val = ret.convert(void)
           putRes.complete(val)
         ).cancelled(proc() =
-          # sig.decr()
+          # TODO: could try and prevent taskpool work before it starts?
           discard
         ).catch(proc(e: ref CatchableError) =
-          # sig.decr()
-          discard
           doAssert false, "will not be triggered"
         )
   ).catch(proc(e: ref CatchableError) =

datastore/threads/threadsignalpool.nim

@@ -84,9 +84,9 @@ type
 
   SharedSignal* = SharedPtr[SharedSignalObj]
 
-proc `=destroy`*[T](x: var SharedSignalObj) =
+proc `=destroy`*(x: var SharedSignalObj) =
   if x.sigptr != nil:
-    echo "ThreadSignalObj: destroy "
+    echoed "ThreadSignalObj: destroy "
     release(x.sigptr)
     x.sigptr = nil