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check for nullptr before publishing event (#714)

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Signed-off-by: alberto <asoragna@irobot.com>
This commit is contained in:
Alberto Soragna 2019-05-02 18:24:44 +01:00 • committed by Dirk Thomas
parent 59d59b0c18
commit 7ed130cf7a
1 changed files with 4 additions and 2 deletions
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6
rclcpp/src/rclcpp/node_interfaces/node_parameters.cpp
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@ -291,8 +291,10 @@ NodeParameters::declare_parameter(
"parameter '" + name + "' could not be set: " + result.reason);
}
// Publish the event.
events_publisher_->publish(parameter_event);
// Publish if events_publisher_ is not nullptr, which may be if disabled in the constructor.
if (nullptr != events_publisher_) {
events_publisher_->publish(parameter_event);
}
return parameters_.at(name).value;
}