diff --git a/jedi/helpers.py b/jedi/helpers.py
index 2c057ef8..259b99bb 100644
--- a/jedi/helpers.py
+++ b/jedi/helpers.py
@@ -1,5 +1,4 @@
 import copy
-import contextlib
 
 import parsing
 import evaluate
@@ -199,19 +198,39 @@ def generate_param_array(args_tuple, parent_stmt=None):
     return arr
 
 
+def check_arr_index(arr, pos):
+    positions = arr.arr_el_pos
+    for index, comma_pos in enumerate(positions):
+        if pos < comma_pos:
+            return index
+    return len(positions)
+
+
+def array_for_pos(arr, pos):
+    if arr.start_pos >= pos \
+            or arr.end_pos[0] is not None and pos >= arr.end_pos:
+        return None, None
+
+    result = arr
+    for sub in arr:
+        for s in sub:
+            if isinstance(s, parsing.Array):
+                result = array_for_pos(s, pos)[0] or result
+            elif isinstance(s, parsing.Call):
+                if s.execution:
+                    result = array_for_pos(s.execution, pos)[0] or result
+                if s.next:
+                    result = array_for_pos(s.next, pos)[0] or result
+
+    return result, check_arr_index(result, pos)
+
+
 def scan_array_for_pos(arr, pos, overwrite_after=False):
     """
     Returns the function Call that matches the position before `arr`.
     This is somehow stupid, probably only the name of the function.
     :param overwrite_after: Overwrite every statement after the found array.
     """
-    def check_arr_index():
-        positions = arr.arr_el_pos
-        for index, comma_pos in enumerate(positions):
-            if pos < comma_pos:
-                return index
-        return len(positions)
-
     call = None
     stop = False
     for sub in arr.values:
@@ -228,7 +247,7 @@ def scan_array_for_pos(arr, pos, overwrite_after=False):
                 # check parts of calls
                 while s is not None:
                     if s.start_pos >= pos:
-                        return call, check_arr_index(), stop
+                        return call, check_arr_index(arr, pos), stop
                     elif s.execution is not None:
                         end = s.execution.end_pos
                         if s.execution.start_pos < pos and \
@@ -254,4 +273,4 @@ def scan_array_for_pos(arr, pos, overwrite_after=False):
 
     # The third return is just necessary for recursion inside, because
     # it needs to know when to stop iterating.
-    return call, check_arr_index(), stop
+    return call, check_arr_index(arr, pos), stop
diff --git a/jedi/refactoring.py b/jedi/refactoring.py
index b496c03c..c36232cb 100644
--- a/jedi/refactoring.py
+++ b/jedi/refactoring.py
@@ -96,15 +96,11 @@ def extract(script, new_name):
     if user_stmt:
         pos = script.pos
         line_index = pos[0] - 1
-        import parsing
-        assert isinstance(user_stmt, parsing.Statement)
-        call, index, stop = helpers.scan_array_for_pos(
-                                        user_stmt.get_assignment_calls(), pos)
-        assert isinstance(call, parsing.Call)
-        exe = call.execution
-        if exe:
-            s = exe.start_pos[0], exe.start_pos[1] + 1
-            positions = [s] + call.execution.arr_el_pos + [exe.end_pos]
+        arr, index = helpers.array_for_pos(user_stmt.get_assignment_calls(),
+                                            pos)
+        if arr:
+            s = arr.start_pos[0], arr.start_pos[1] + 1
+            positions = [s] + arr.arr_el_pos + [arr.end_pos]
             start_pos = positions[index]
             end_pos = positions[index + 1][0], positions[index + 1][1] - 1