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```
use strict
```

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#from http://www.perlmonks.org/?node_id=431329
#use strict; #Uncomment me to get to the root of the problem.
...
#Only get error if you use strict;
print "WRONG Dereffed Array in hash: @$Hash{ArrayInHash}";
print "RIGHT Dereffed Array in hash with brackets: @{$Hash{ArrayInHash
+}}";