nicer error message

2015-03-19 00:15:03 -06:00
parent d34e32432d
commit b488ef49b2
1 changed files with 2 additions and 1 deletions
--- a/txaio/tx.py
+++ b/txaio/tx.py
@@ -60,7 +60,8 @@ def reject_future(future, error=None):
        print("FIXME: passing Exception to reject_future")
        error = Failure(error)
    else:
-        assert isinstance(error, IFailedPromise)
+        if not isinstance(error, IFailedPromise):
+            raise RuntimeError("reject_future requires an IFailedPromise")
    future.errback(error)