What happened?

After upgrading a dependency (Flux Helm Controller) to use Helm 4.1.3, we started seeing Helm releases fail with a MalformedYAMLError: yaml: line 2: found unexpected end of stream error. These templates contain multiple consecutive groups of --- without using them as document separators (e.g. in script output etc.). Notably, these instances do not occur at the start of a line.

This is related to #31867 and #31868.

What did you expect to happen?

Templates with consecutive groups of --- that are not document separators should remain untouched.

How can we reproduce it (as minimally and precisely as possible)?

Reproduction works the same as in #31867, with the sole difference being the template being used. As a somewhat contrived example, one might use the following:

---
apiVersion: v1
kind: ConfigMap
metadata:
  name: print-dashes-script
data:
  print-dashes.sh: |
    #!/usr/bin/env bash
    echo "------------------------------------"

Helm version

Kubernetes version

$ kubectl version
Client Version: v1.34.3
Kustomize Version: v5.7.1