Could this bug have been picked up by some sibling of use warnings ?

Based on what? Lets see

• you're using map in void context, but that has been silenced since 5.9.0
• you're treating $hr as a hashref, but you're discarding the value, hmmm, lets check

  $ perl -Mstrict -Mwarnings -le " my $hr; $hr->{stuff}"
  Useless use of hash element in void context at -e line 1.
  
  $ perl -Mstrict -Mwarnings -le " my $hr; map { $hr->{stuff} } 1"
  
  $ perl -Mstrict -Mwarnings -le " my $hr;  $hr->{stuff} for 1"
  Useless use of hash element in void context at -e line 1.
  [download]

Congratulations andreas1234567, you have found a bug: map in void context silences "Useless use of hash element in void context".

Please use perlbug and report this bug :)

A similar bug is #68592: 'Useless use of not in void context' should appear in more cases

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