tk diff interpreting null as 0 resulting in error

[strowi]

Hi,

i have included a helm chart in my tanka deployment where i need to remove the resources cpu limit. So i tried the following:

chart: helm.template(
        'victoriametrics', '../../charts/victoria-metrics-operator', {
          namespace: 'victoriametrics',
          values: {
            logLevel: 'error',
...
            resources: {
              limits: {
                cpu: null,
                memory: '320Mi',
              },
              requests: {
                cpu: '80m',
                memory: '120Mi',
              },
            },
...

While tk show and tk apply both seem to correctly result in:

...
    resources:
      limits:
        memory: 320Mi
      requests:
        cpu: 80m
        memory: 120Mi

a diff --diff-strategy validate --with-prune --summarize environment/xyz seems to incorrectly interpret null as 0:

~> tk diff --diff-strategy validate --with-prune --summarize environments/$DEPLOY_ENV
Warning: Use tokens from the TokenRequest API or manually created secret-based tokens instead of auto-generated secret-based tokens.
{"level":"info","time":"2023-08-04T09:33:05Z","message":"Finding orphaned resources to prune"}
{"level":"info","time":"2023-08-04T09:33:06Z","message":"creating list of UIDs from known resources (those generated by the env)"}
{"level":"info","duration_ms":15877.509326,"count":116,"time":"2023-08-04T09:33:21Z","message":"done creating list of UIDs"}
{"level":"info","time":"2023-08-04T09:33:21Z","message":"fetching resources previously created by this env"}
{"level":"info","duration_ms":18319.49993,"count":164,"time":"2023-08-04T09:33:40Z","message":"done fetching previously created resources"}
Warning: Use tokens from the TokenRequest API or manually created secret-based tokens instead of auto-generated secret-based tokens.
The Deployment "victoriametrics-victoria-metrics-operator" is invalid: spec.template.spec.containers[0].resources.requests: Invalid value: "80m": must be less than or equal to cpu limit of 0
Error: exit status 2