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-rw-r--r--actionpack/lib/action_dispatch/http/response.rb4
1 files changed, 3 insertions, 1 deletions
diff --git a/actionpack/lib/action_dispatch/http/response.rb b/actionpack/lib/action_dispatch/http/response.rb
index a895d1ab18..5fe544c60c 100644
--- a/actionpack/lib/action_dispatch/http/response.rb
+++ b/actionpack/lib/action_dispatch/http/response.rb
@@ -113,7 +113,9 @@ module ActionDispatch # :nodoc:
# The underlying body, as a streamable object.
attr_reader :stream
- def initialize(status = 200, header = {}, body = [], default_headers: self.class.default_headers)
+ # Ruby 2.2 bug https://bugs.ruby-lang.org/issues/10685 prevents
+ # default_headers from being a keyword argument.
+ def initialize(status = 200, header = {}, body = [], default_headers = self.class.default_headers)
super()
header = merge_default_headers(header, default_headers)