- The :class:`.mysql.SET` type has been overhauled to no longer

assume that the empty string, or a set with a single empty string
value, is in fact a set with a single empty string; instead, this
is by default treated as the empty set.  In order to handle persistence
of a :class:`.mysql.SET` that actually wants to include the blank
value ``''`` as a legitimate value, a new bitwise operational mode
is added which is enabled by the
:paramref:`.mysql.SET.retrieve_as_bitwise` flag, which will persist
and retrieve values unambiguously using their bitflag positioning.
Storage and retrieval of unicode values for driver configurations
that aren't converting unicode natively is also repaired.
fixes #3283

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/sqlalchemy/util/langhelpers.py b/lib/sqlalchemy/util/langhelpers.py
index ac6b50de2..7f57e501a 100644
--- a/lib/sqlalchemy/util/langhelpers.py
+++ b/lib/sqlalchemy/util/langhelpers.py
@@ -969,7 +969,7 @@ def coerce_kw_type(kw, key, type_, flexi_bool=True):
             kw[key] = type_(kw[key])
 
 
-def constructor_copy(obj, cls, **kw):
+def constructor_copy(obj, cls, *args, **kw):
     """Instantiate cls using the __dict__ of obj as constructor arguments.
 
     Uses inspect to match the named arguments of ``cls``.
@@ -978,7 +978,7 @@ def constructor_copy(obj, cls, **kw):
 
     names = get_cls_kwargs(cls)
     kw.update((k, obj.__dict__[k]) for k in names if k in obj.__dict__)
-    return cls(**kw)
+    return cls(*args, **kw)
 
 
 def counter():