Corrected the is_subquery() check based on recent changes. Excluded the test_in_filtering_advanced test for mssql.

2 files changed, 2 insertions, 2 deletions

diff --git a/lib/sqlalchemy/sql/compiler.py b/lib/sqlalchemy/sql/compiler.py
index 2072d5a27..51664d64e 100644
--- a/lib/sqlalchemy/sql/compiler.py
+++ b/lib/sqlalchemy/sql/compiler.py
@@ -180,7 +180,7 @@ class DefaultCompiler(engine.Compiled):
             return meth(obj, **kwargs)
 
     def is_subquery(self):
-        return self.stack and self.stack[-1].get('from')
+        return self.stack and len(self.stack) > 1 and self.stack[-1].get('from')
 
     def construct_params(self, params=None):
         """return a dictionary of bind parameter keys and values"""
diff --git a/test/sql/query.py b/test/sql/query.py
index 4d52c2764..4decf3b68 100644
--- a/test/sql/query.py
+++ b/test/sql/query.py
@@ -590,7 +590,7 @@ class QueryTest(TestBase):
         r = s.execute(search_key=None).fetchall()
         assert len(r) == 0
 
-    @testing.fails_on('firebird', 'maxdb', 'oracle')
+    @testing.fails_on('firebird', 'maxdb', 'oracle', 'mssql')
     def test_in_filtering_advanced(self):
         """test the behavior of the in_() function when comparing against an empty collection."""