Whoops! It looks like puppet-lint has encountered an error that it doesn't know how to handle.

[cxm21]

Describe the Bug

We use functions .reduce .unique .sort .each we get the Whoops! error and "NoMethodError: undefined method `[]' for nil:NilClass". It passed puppet-lint 2.5.2 without errors.

Expected Behavior

puppet-lint should handle the functions .reduce .unique .sort .each in the .pp file.

Steps to Reproduce

Run puppet-lint on *.pp with functions .reduce .unique .sort .each, for example:

.reduce([]) | $memo,$value | {
if ( $value[0] == '/' ) {
if ( $validate_mpt and
( ! $absent_if_nompt ) and
( $::facts[mountpoints][$value] == undef ) ) {
$memo
} else {
$memo + [ $value ]
}
} else {
$memo + keys($::facts[mountpoints]).grep($value)
}
}
.unique
.sort

Environment

• Version 4.0.0, also the 3.x.x versions
• Platform CentOS 6.10 and RHEL 8.7

Additional Context

We are converting from Puppet V6 to Puppet V7 when we encounter this problem.
puppet-lint-output.txt