diff --git a/evaluate.py b/evaluate.py
index 842d02e0..5aa3f585 100644
--- a/evaluate.py
+++ b/evaluate.py
@@ -936,6 +936,9 @@ def get_scopes_for_name(scope, name_str, position=None, search_global=False):
                 if isinstance(it, (Generator, Array)):
                     generators.append(it)
                 else:
+                    if not hasattr(it, 'execute_subscope_by_name'):
+                        debug.warning('for loop input wrong', it)
+                        continue
                     try:
                         generators += it.execute_subscope_by_name('__iter__')
                     except KeyError:
diff --git a/mixin/builtins.py b/mixin/builtins.py
index 9b9f3225..e4e986a9 100644
--- a/mixin/builtins.py
+++ b/mixin/builtins.py
@@ -21,6 +21,9 @@ def iter(collection, sentinel=None):
         for c in collection:
             yield c
 
+def range(start, stop=None, step=1):
+    return [0]
+
 
 #--------------------------------------------------------
 # descriptors
diff --git a/test/completion/basic.py b/test/completion/basic.py
index ee9323a9..617bab9d 100644
--- a/test/completion/basic.py
+++ b/test/completion/basic.py
@@ -45,6 +45,13 @@ for i in b:
 #? float() str()
 a[0]
 
+# -----------------
+# range()
+# -----------------
+for i in range(10):
+    #? int()
+    i
+
 # -----------------
 # list comprehensions
 # -----------------