What did you do?

Running a v3.7 docker image (i.e. quay.io/prometheus/prometheus:v3.7.1) against a config file that has no AWS region for service discovery yields an error

What did you expect to see?

No config error. Running the same config against 3.6.0 does not yield an error.

What did you see instead? Under which circumstances?

msg="Error loading config (--config.file=/prom/prom.yml)" file=/prom/prom.yml err="parsing YAML file /prom/prom.yml: EC2 SD configuration requires a region"

System information

Linux 6.1.155-176.282.amzn2023.x86_64 x86_64

Prometheus version

Prometheus configuration file

scrape_configs:
      - job_name: testsd
        ec2_sd_configs:
          - refresh_interval: 30s

Alertmanager version

Alertmanager configuration file

Logs