systemd-nspawn --setenv fails when passing multiple variables and not specifying values

[chrooti]

systemd version the issue has been seen with

255.6

Used distribution

Arch Linux

Linux kernel version used

6.8.9

CPU architectures issue was seen on

x86_64

Component

systemd-nspawn

Expected behaviour you didn't see

The variables are fetched from the environment and set to their corresponding value.
E.g. given

A=1
B=2
C=3

I get an nspawn container with A set to 1, B set to 2 and C set to 3.

Unexpected behaviour you saw

"Cannot assign environment variable A,B,C"
Systemd is probably trying to parse A,B,C as a single variable

Steps to reproduce the problem

systemd-nspawn -D my-nspawn-path --setenv=A,B,C /bin/sh

Additional program output to the terminal or log subsystem illustrating the issue

No response

[yuwata]

Please use --setenv=A --setenv=B --setenv=C.