Sprig_fail not correct work

[dpmorozov]

Examples:

{{ if eq (len nodes) 0 }}
{{ sprig_fail "ERROR" }}
{{ end }}

Result:
execute: template: :35:9: executing "" at <sprig_fail "Error">: error calling sprig_fail: Error

{{ $test := nodes }}
{{ if $test }}
  {{ sprig_fail }}
{{ end }}

Result:
execute: template: :35:9: executing "" at <sprig_fail "Error">: error calling sprig_fail: Error

{{ $test := nodes }}
{{ if not $test }}
  {{ sprig_fail }}
{{ end }}

Result:
execute: template: :35:9: executing "" at <sprig_fail "Error">: error calling sprig_fail: Error

Unexpected behavior.

If any information is needed, I am ready to provide it.

consul-template v0.41.1 (80a4e25)