fixed extra bonus bug

diff --git a/requests/models.py b/requests/models.py
index 8fd973535c33c6bc07bf947c893a81da71dee91f..3f15cc1f6265c94a7492b663337610cdff3ee664 100644 (file)
--- a/requests/models.py
+++ b/requests/models.py
@@ -295,7 +295,7 @@ class PreparedRequest(RequestEncodingMixin, RequestHooksMixin):
         p = PreparedRequest()
         p.method = self.method
         p.url = self.url
-        p.headers = self.headers
+        p.headers = self.headers.copy()
         p.body = self.body
         p.hooks = self.hooks
         return p