PR python/14386:

* varobj.c (update_dynamic_varobj_children): Don't call
	PyIter_Check.
gdb/testsuite
	* gdb.python/py-mi.exp: Add test for printer whose children
	are a list.
	* gdb.python/py-prettyprint.c (struct children_as_list): New.
	(main): New variable children_as_list.
	* gdb.python/py-prettyprint.py (class pp_children_as_list):
	New.
	(register_pretty_printers): Register new printer.

gdb/testsuite/gdb.python/py-prettyprint.py

@@ -174,6 +174,18 @@ class pp_hint_error:
     def display_hint (self):
         raise Exception("hint failed")
 
+class pp_children_as_list:
+    "Throw error from display_hint"
+
+    def __init__(self, val):
+        self.val = val
+
+    def to_string(self):
+        return 'children_as_list_val'
+
+    def children (self):
+        return [('one', 1)]
+
 class pp_outer:
     "Print struct outer"
 
@@ -282,6 +294,9 @@ def register_pretty_printers ():
     pretty_printers_dict[re.compile ('^struct hint_error$')]  = pp_hint_error
     pretty_printers_dict[re.compile ('^hint_error$')]  = pp_hint_error
 
+    pretty_printers_dict[re.compile ('^struct children_as_list$')]  = pp_children_as_list
+    pretty_printers_dict[re.compile ('^children_as_list$')]  = pp_children_as_list
+
     pretty_printers_dict[re.compile ('^memory_error$')]  = MemoryErrorString
 
     pretty_printers_dict[re.compile ('^eval_type_s$')] = pp_eval_type