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https://issues.apache.org/jira/browse/VCL-541?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andy Kurth resolved VCL-541.
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Resolution: Fixed
> Remove "return 0" from all subroutines which normally return an array or hash
> -----------------------------------------------------------------------------
>
> Key: VCL-541
> URL: https://issues.apache.org/jira/browse/VCL-541
> Project: VCL
> Issue Type: Bug
> Components: vcld (backend)
> Affects Versions: 2.2.1
> Reporter: Andy Kurth
> Assignee: Andy Kurth
> Priority: Minor
> Fix For: 2.3
>
>
> Subroutines which return a hash or array should not return 0 if an error
> occurs. For example, if the caller assumes a hash is returned and then
> attempts to iterate over the hash, the following error will occur:
> Can't use string ("0") as a HASH ref while "strict refs" in use at
> /usr/local/vcl/bin/../lib/VCL/Module/OS/Windows.pm line 1992
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