diff --git a/jedi/evaluate_representation.py b/jedi/evaluate_representation.py
index 0c04382c..b74f576c 100644
--- a/jedi/evaluate_representation.py
+++ b/jedi/evaluate_representation.py
@@ -641,13 +641,14 @@ class Execution(Executable):
                 elif commands[0] == '**':
                     arrays = evaluate.follow_call_list(commands[1:])
                     for array in arrays:
-                        for key_stmt, value_stmt in array.items():
-                            # first index, is the key if syntactically correct
-                            call = key_stmt.get_commands()[0]
-                            if isinstance(call, pr.Name):
-                                yield call, value_stmt
-                            elif type(call) is pr.Call:
-                                yield call.name, value_stmt
+                        if isinstance(array, Array):
+                            for key_stmt, value_stmt in array.items():
+                                # first index, is the key if syntactically correct
+                                call = key_stmt.get_commands()[0]
+                                if isinstance(call, pr.Name):
+                                    yield call, value_stmt
+                                elif type(call) is pr.Call:
+                                    yield call.name, value_stmt
                 # Normal arguments (including key arguments).
                 else:
                     if stmt.assignment_details:
diff --git a/test/completion/arrays.py b/test/completion/arrays.py
index 13b1ea1c..4725435d 100644
--- a/test/completion/arrays.py
+++ b/test/completion/arrays.py
@@ -212,7 +212,7 @@ f()
 d = dict({'a':''})
 def y(a):
     return a
-#? str()
+#? 
 y(**d)
 
 # -----------------