[Sqlalchemy-tickets] Issue #4279: table.tometadata() fails on index that was created on interim version of table (zzzeek/sqlalchemy)

[Michael B. <iss...@bi...>]

New issue 4279: table.tometadata() fails on index that was created on interim version of table
https://bitbucket.org/zzzeek/sqlalchemy/issues/4279/tabletometadata-fails-on-index-that-was

Michael Bayer:

This seems to be a regression in 1.2 due to #4147


```
#!python

from sqlalchemy import *

m1 = MetaData()

t1 = Table(
    'test',
    m1,
    Column('id', Integer, primary_key=True),
    Column('eventtime', DateTime),
)

Index("ix_test", t1.c.eventtime)

t1 = Table(
    'test',
    m1,
    Column('id', Integer, primary_key=True),
    Column('eventtime', DateTime),
    extend_existing=True
)


m2 = MetaData()

t2 = t1.tometadata(m2)

```