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An older part of our codebase has a function for converting a data structure to XML, using XML::Simple (for some legacy reason), and saving it to a directory.

At some point, we upgraded XML::Simple to 2.24, and it started throwing "Use of uninitialized value" errors. Whatever caused this was irrelevant to our purposes, so I put this in a block with "no warnings 'uninitialized';", and all was good.

For no reason that I can tell--I didn't upgrade any package, or my Perl version (5.16.3 for this)--our test suite is now throwing the error again, though the "no warnings" is right there:

    use XML::Simple;

    my $xml; 
    {
    # Suppress warnings from XML::Simple 2.24
    no warnings 'uninitialized';
    my $xmlout = XMLout($data, NoAttr => 1, RootName => undef, Suppres
+sEmpty => 0);
    $xml = '<xml version="1.0" encoding="UTF-8">' . "\n$xmlout</xml>";
    }
[download]

Result from test suite:

Use of uninitialized value at /[path/to]/Data.pm line 205.
Use of uninitialized value at /[path/to]/Data.pm line 205.
Use of uninitialized value at /[path/to]/Data.pm line 205.
[...]
[download]

Where line 205 is the "my $xmlout..." from above.

Can someone explain why I am getting a warning that I explicitly shut off on the immediately preceding line? And how I stop this? The tests pass, but it's distracting as hell to get 50 lines of this error every time we run it.

In reply to "no warnings 'uninitialized'" failing by jest

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