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Copy the headers dictionary in WebAPIResponseError.

We were defaulting the headers parameter to the WebAPIResponseError
constructor to None and then creating a new dictionary if it was None. The
reason for this is that we modify the dictionary and don't want to risk
that going into the static default dictionary for the parameter (as this
would impact future instances). However, the right solution is just to
copy the dictionary.
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commit ef1a8e03f7165b613fbcb9d300f80a4b24bd3368 1 parent bb2e26b
@chipx86 chipx86 authored
Showing with 2 additions and 2 deletions.
  1. +2 −2 djblets/webapi/
4 djblets/webapi/
@@ -324,7 +324,7 @@ class WebAPIResponseError(WebAPIResponse):
A general error response, containing an error code and a human-readable
- def __init__(self, request, err, extra_params={}, headers=None,
+ def __init__(self, request, err, extra_params={}, headers={},
*args, **kwargs):
errdata = {
'err': {
@@ -334,7 +334,7 @@ def __init__(self, request, err, extra_params={}, headers=None,
- headers = headers or {}
+ headers = headers.copy()
WebAPIResponse.__init__(self, request, obj=errdata, stat="fail",

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