Avoid using items() in environ.update(). Fixes #1124513.

Will backport to 2.4.

1 files changed, 18 insertions, 8 deletions

diff --git a/Lib/os.py b/Lib/os.py
index b967978600..5824609b14 100644
--- a/Lib/os.py
+++ b/Lib/os.py
@@ -445,12 +445,17 @@ else:
             def update(self, dict=None, **kwargs):
                 if dict:
                     try:
-                        items = dict.items()
+                        keys = dict.keys()
                     except AttributeError:
                         # List of (key, value)
-                        items = dict
-                    for k, v in items:
-                        self[k] = v
+                        for k, v in dict:
+                            self[k] = v
+                    else:
+                        # got keys
+                        # cannot use items(), since mappings
+                        # may not have them.
+                        for k in keys:
+                            self[k] = dict[k]
                 if kwargs:
                     self.update(kwargs)
             def copy(self):
@@ -467,12 +472,17 @@ else:
             def update(self,  dict=None, **kwargs):
                 if dict:
                     try:
-                        items = dict.items()
+                        keys = dict.keys()
                     except AttributeError:
                         # List of (key, value)
-                        items = dict
-                    for k, v in items:
-                        self[k] = v
+                        for k, v in dict:
+                            self[k] = v
+                    else:
+                        # got keys
+                        # cannot use items(), since mappings
+                        # may not have them.
+                        for k in keys:
+                            self[k] = dict[k]
                 if kwargs:
                     self.update(kwargs)
             try: