Ticket #10797: 10797-003.patch

a/actionpack/lib/action_controller/request.rb

@@ -674 +674 @@
-            else
-              top << {key => value}.with_indifferent_access
-              push top.last
+              value = top[key]
-            end
-          else
-            top << value

a/actionpack/test/controller/request_test.rb

@@ -705 +705 @@
-    expected = { "test2" => "value1" }
-    assert_equal expected, ActionController::AbstractRequest.parse_request_parameters(input)
-  end
+
+  def test_parse_params_with_array_prefix_and_hashes
+    input = { "a[][b][c]" => %w(d) }
+    expected = {"a" => [{"b" => {"c" => "d"}}]}
+    assert_equal expected, ActionController::AbstractRequest.parse_request_parameters(input)
+  end
-end
-
-