See perlvar on %ENV:

As of v5.18.0, both keys and values stored in %ENV are stringified.

The solution is to not store the database connection in %ENV but to store it in some other global variable or to write a function that stores the connection:

sub get_dbh {
    state $dbh ||= connect_dbh( ... );
}

[download]

In reply to Re: Custom $ENV after upgrade not holding DBI connection by Corion
in thread Custom $ENV after upgrade not holding DBI connection by ChrisOfVa

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