Prevents the Future result from being set twice.

[fujitatomoya]

Description

Fixes #1598

Is this user-facing behavior change?

Yes, but this fixes the behavior that has been changed by #1469

Did you use Generative AI?

Yes, Copilot Claude Sonnet 4.5

Additional Information

[fujitatomoya]

this patch is created because of #1469, but i think this is generic fix to all the downstream distros.

[ahcorde]

Pulls: #1599
Gist: https://gist.githubusercontent.com/ahcorde/445bb8206b3c974d83e6705b8e5594e6/raw/b5acd828317798ce9a1f6501695924ecadc5a724/ros2.repos
BUILD args: --packages-above-and-dependencies rclpy
TEST args: --packages-above rclpy
ROS Distro: rolling
Job: ci_launcher
ci_launcher ran: https://ci.ros2.org/job/ci_launcher/18119

• Linux
• Linux-aarch64
• Linux-rhel
• Windows

[fujitatomoya]

• Linux-rhel

[fujitatomoya]

@Mergifyio backport kilted jazzy humble

[mergify]

backport kilted jazzy humble

✅ Backports have been created

Details

• #1603 Prevents the Future result from being set twice. (backport #1599) has been created for branch kilted
• #1604 Prevents the Future result from being set twice. (backport #1599) has been created for branch jazzy
• #1605 Prevents the Future result from being set twice. (backport #1599) has been created for branch humble but encountered conflicts

Cherry-pick of a348801 has failed:

On branch mergify/bp/humble/pr-1599
Your branch is up to date with 'origin/humble'.

You are currently cherry-picking commit a348801.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   rclpy/rclpy/action/server.py

no changes added to commit (use "git add" and/or "git commit -a")

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