--- /dev/null
+From 29053c4832229efa7160fb944c05e3bc82e11540 Mon Sep 17 00:00:00 2001
+From: Martijn Buijs <Martijn.buijs@gmail.com>
+Date: Tue, 23 Apr 2019 18:20:12 +0200
+Subject: [PATCH] Switch to yaml.safe_load(_all) to prevent YAMLLoadWarning
+ (#1688)
+
+* Switch to yaml.safe_load(_all) to prevent YAMLLoadWarning
+
+* Change all usages of yaml.load to yaml.safe_load
+
+* Extend PyYAML's SafeLoader and use it with `yaml.load`
+
+Also added convenience functions for using this loader for reuse in
+`roslaunch`
+
+* fix typo in rosparam.yaml_load_all
+
+* Modify Loader and SafeLoader in yaml module directly
+
+* Revert whitespace change
+
+* Revert unrelated change to import through global variable construction
+---
+ clients/rospy/src/rospy/client.py | 2 +-
+ .../test/test_roslib_message.py | 2 +-
+ .../client_verification/test_slave_api.py | 2 +-
+ test/test_rosparam/test/check_rosparam.py | 8 ++---
+ .../check_rosparam_command_line_online.py | 2 +-
+ .../check_rosservice_command_line_online.py | 4 +--
+ test/test_rostopic/test/test_rostopic_unit.py | 30 +++++++++----------
+ tools/rosbag/src/rosbag/bag.py | 2 +-
+ tools/rosgraph/src/rosgraph/roslogging.py | 2 +-
+ tools/roslaunch/src/roslaunch/loader.py | 4 +--
+ .../test/unit/test_roslaunch_dump_params.py | 4 +--
+ tools/rosparam/src/rosparam/__init__.py | 7 ++++-
+ tools/rosservice/src/rosservice/__init__.py | 4 +--
+ tools/rostopic/src/rostopic/__init__.py | 6 ++--
+ tools/topic_tools/scripts/relay_field | 2 +-
+ 15 files changed, 43 insertions(+), 38 deletions(-)
+
+diff --git a/tools/topic_tools/scripts/relay_field b/tools/topic_tools/scripts/relay_field
+index 6630b685d..cc73ac443 100755
+--- a/tools/topic_tools/scripts/relay_field
++++ b/tools/topic_tools/scripts/relay_field
+@@ -98,7 +98,7 @@ class RelayField(object):
+ if self.input_fn is not None:
+ m = self.input_fn(m)
+
+- msg_generation = yaml.load(self.expression)
++ msg_generation = yaml.safe_load(self.expression)
+ pub_args = _eval_in_dict_impl(msg_generation, None, {'m': m})
+
+ now = rospy.get_rostime()