text: roslaunch: rosparam does not override parameters in local namespace
  The wikipage on rosparam states that
  Similarly, load commands can override parameters previously declared.
  But I found that having a
  rosparam in a
  node tag does not behave this way. Am I misinterpreting the wiki page or may this be a bug?
  A minimal example: This works as expected:
  <launch> <node name="my_node" pkg="roscpp_tutorials" type="talker" /> <param name="my_param" value="my value" /> <rosparam>my_param: "my_overridden_value"</rosparam> </launch>
  rosparam dump gives "[...] my_param: my_overridden_value [...]".
  But:
  <launch> <node name="my_node" pkg="roscpp_tutorials" type="talker"> <param name="my_param" value="my value" /> <rosparam>my_param: "my_overridden_value"</rosparam> </node> </launch>
  yields "[...] my_node: {my_param: my value} [...]"., whereas on might expect "my_node: {my_param: my_overridden value}".
  From the doc, I also understand that the rule should be "Last value wins", which shows to be the case at the root level of the launchfile, but not within a node description. In addition to that, manually loading this param after launching the process works as expected with
  rosparam load
  @serial: If this is not the case within a node description, wouldn't this be a bug then?