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

-- stderr.txt --
level=INFO msg="Finding all rules to check" paths=["rules"]
level=INFO msg="Checking Prometheus rules" entries=1 workers=10 online=true
Fatal: This rule is not a valid Prometheus rule: `missing expr key`. (yaml/parse)
  ---> rules/strict.yml:4
 4 |   - record: foo
     ^^^ This rule is not a valid Prometheus rule: `missing expr key`.

level=INFO msg="Problems found" Fatal=1
level=ERROR msg="Execution completed with error(s)" err="found 1 problem(s) with severity Bug or higher"
-- rules/strict.yml --
groups:
- name: foo
  rules:
  - record: foo
