title: Argument isn't numeric - question
body: <p>Why doesn't the first example output a warning?</p>
  
  <pre><code>#!/usr/bin/env perl
  use warnings;
  use 5.012;
  
  my $c = "9\n";
  say $c * 2;
  
  my $d = "6a";
  say $d * 2;
  
  # 18
  # Argument "6a" isn't numeric in multiplication (*) at ./perl8.pl line 9.
  # 12
  </code></pre>