cli: read the engine's answer after a failed request write, so a refusal is not lost as a broken pipe (hq issue 444)

go/cli/cli.go

@@ -140,7 +140,15 @@ func AskWith(ctx context.Context, socket string, req Request) (Answer, error) {
 		_ = conn.SetDeadline(deadline)
 	}
 	if err := WriteRequest(conn, req); err != nil {
-		return Answer{}, fmt.Errorf("asking the node-engine: %w", err)
+		// The engine may have answered before it read the request — a refusal (busy, an unknown account) written
+		// and the connection closed — and the write then fails on the close. That answer is already waiting, and
+		// it says why where the write error says only that the pipe broke (novox/hq issue 444, found under issue
+		// 434). So read it, within the deadline the connection already has, and only when none came say the write.
+		a, rerr := ReadAnswer(conn)
+		if rerr != nil {
+			return Answer{}, fmt.Errorf("asking the node-engine: %w; and no answer came (%v)", err, rerr)
+		}
+		return a, nil
 	}
 	a, err := ReadAnswer(conn)
 	if err != nil {