perl 5.010 Can't locate object method "seek" via package "IO::Handle"

jandrew has asked for the wisdom of the Perl Monks concerning the following question:

I confess that I never attempted to seek on an IO::Handle when I was writing for perl 5.10, but I am currently attempting to release a package that includes this action and I would like to verify support back to 5.10. I get the title error in my travis-ci tests (with the container based Debian). Any thoughts on how to get around this? I suspect some incremental support occurred from 5.012 onward and that there is a known way around it for perls 5.010 and earlier but I'm unable to find it with a search. I would appreciate any suggestions.

The top level docs aren't complete on the GitHub page yet

Comment on perl 5.010 Can't locate object method "seek" via package "IO::Handle"

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Re: perl 5.010 Can't locate object method "seek" via package "IO::Handle" by stevieb (Canon) on May 05, 2016 at 20:42 UTC
Put `use FileHandle;` at the top of the module that is producing the errors. Some older perls don't load it automatically. Example: `$ perl -E 'open $fh, "<a.txt"; $fh->seek(0, 0);' Can't locate object method "seek" via package "IO::Handle" at -e line +1.` [download] `$ perl -MFileHandle -E 'open $fh, "<a.txt"; $fh->seek(0, 0);'` [download] Or, depending on the code in question (you don't specify where it is), you could use the seek function instead (no need for FileHandle): `seek $fh, 0, 0;` [download]	[reply] [d/l] [select]
Re^2: perl 5.010 Can't locate object method "seek" via package "IO::Handle" by jandrew (Chaplain) on May 05, 2016 at 21:48 UTC
stevieb++ use FileHandle did the trick! I can support perl 5.010 now. Thanks for the help I don't think I would have found that on my own (I had already tried use IO::Handle with no joy. I was going down the road of minimum version requirements and feeling lost.) There is a link to my code in the first post but it's hidden. Here is the code https://github.com/jandrew/p5-spreadsheet-reader-excelxml and the failing tests https://travis-ci.org/jandrew/p5-spreadsheet-reader-excelxml/jobs/128071531.	[reply]


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