Nav2: nav2_planner fails with -Werror=maybe-uninitialized

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Hi,

I'm new to ROS, and I'm currently exploring Nav2 (and I have to say, Linux as well). I haven't found a related topic, and would like to know if anyone has encountered a similar issue.

When trying to setup a Nav2 workspace by following the build instructions, a warning ends up being treated as an error when processing nav2_planner:

[Processing: nav2_planner, nav2_recoveries, nav2_regulated_pure_pursuit_controller, smac_planner] --- stderr: nav2_planner In file included from /opt/ros/foxy/include/rclcpp/node_interfaces/node_parameters_interface.hpp:28,

from /opt/ros/foxy/include/rclcpp/node.hpp:51,

from /opt/ros/foxy/include/rclcpp/executors/single_threaded_executor.hpp:28,

from /opt/ros/foxy/include/rclcpp/executors.hpp:22,

from /opt/ros/foxy/include/rclcpp/rclcpp.hpp:146,

from /home/xxxxxx/nav2_ws/install/nav2_util/include/nav2_util/costmap.hpp:21,

from /home/xxxxxx/nav2_ws/src/navigation2/nav2_planner/src/planner_server.cpp:27:

/opt/ros/foxy/include/rclcpp/parameter.hpp: In member function ‘virtual nav2_util::CallbackReturn nav2_planner::PlannerServer::on_configure(const rclcpp_lifecycle::State&)’: /opt/ros/foxy/include/rclcpp/parameter.hpp:70:42: error: ‘expected_planner_frequency’ may be used uninitialized in this function [-Werror=maybe-uninitialized]

70 | : Parameter(name, ParameterValue(value))

| ^

/home/xxxxxx/nav2_ws/src/navigation2/nav2_planner/src/planner_server.cpp:117:10: note: ‘expected_planner_frequency’ was declared here

117 | double expected_planner_frequency;

| ^~~~~~~~~~~~~~~~~~~~~~~~~~

cc1plus: all warnings being treated as errors

make[2]: *** [CMakeFiles/planner_server_core.dir/build.make:63: CMakeFiles/planner_server_core.dir/src/planner_server.cpp.o] Error 1

make[1]: *** [CMakeFiles/Makefile2:107: CMakeFiles/planner_server_core.dir/all] Error 2

make: *** [Makefile:141: all] Error 2

---

Failed <<< nav2_planner [1min 21s, exited with code 2]

Instructions being used:

https://navigation.ros.org/build_inst...

Changes I made to the original instructions because I'm using Linux Mint:

$ rosdep install -y -r -q --from-paths src --ignore-src --rosdistro foxy --os=ubuntu:focal

Error shows while running:

$ colcon build --symlink-install

I'm running Linux Mint 20.1 Ulyssa (kernel 5.4.0-73)

ROS information:

• ROS_VERSION=2
• ROS_PYTHON_VERSION=3
• ROS_LOCALHOST_ONLY=0
• ROS_DISTRO=foxy

Any help is greatly appreciated, thank you!