\(my $var) is not an unused variable (RT 82411)

[jkeenan]

Transferred from rt.cpan.org ...

Original Ticket Information

• RT #: 82411
• URL: https://rt.cpan.org/Ticket/Display.html?id=82411
• Requestor: Olivier Mengué (DOLMEN)
• Date: Jan 04 2013

Original Text

When a reference to a variable is used it should not be considered unused.

There is a common idiom when declaring an empty object which internal
representation is a scalar:

    bless do { \(my $x) }, $class

or

    bless \(my $y), $class

Currently $x is reported as unused, while it is.

Follow-up Report (same date as original)

Workaround:

do { my $x; bless \($x), $class }