pint.error --no-color lint rules
! stdout .
cmp stderr stderr.txt

-- stderr.txt --
level=info msg="Loading configuration file" path=.pint.hcl
rules/0001.yml:1-2 Bug: annotation_.* annotation is required (alerts/annotation)
 1 | - alert: Instance Is Down 1
 2 |   expr: up == 0

level=info msg="Problems found" Bug=1
level=fatal msg="Fatal error" error="found 1 problem(s) with severity Bug or higher"
-- rules/0001.yml --
- alert: Instance Is Down 1
  expr: up == 0

-- .pint.hcl --
parser {
  relaxed = [".*"]
}
rule {
  annotation "annotation_.*" {
    required = true
    severity = "bug"
  }
}
