Data Plane API event listener fails with backported Debian-packaged HAProxy.

[Arnaud-IFEA]

Hello,

using package from https://haproxy.debian.net/

• Debian 13
• Haproxy 3.3-stable

The packages have this form : 3.3.x-y~bpo13+1
It's also the version with "show info".

echo "show info" | sudo socat - /run/haproxy/admin.sock
Name: HAProxy
Version: 3.3.10-1~bpo13+1
Release_date: 2026/05/11

It results with:
level=error msg="Failed to start HAProxy's event listener:invalid semantic version" when launching dataplaneapi as 3.3.x-y~bpo13+1 is not semver compliant for dataplaneapi.

[vincentbernat]

Semantic versioning is not really a standard. The tilde is a known weakness but it predates by more a decade this convention (and is a shared convention by both Debian and RedHat). The fix may not be straightforward as HAProxy/semver is using the hyphen in a different way (3.4-dev14 is before 3.4.0, while this is the reverse for Debian/RedHat).