Yes, almost always,
@foo[$bar] is broken, and should have been written
$foo[$bar]. In many cases, this is an undetectable mistake, as in:
$total = @a[3] + @a[4]; # works
print @a[5]; # works
But is fatal when we use it in a place where it makes a difference:
@a[3] = <STDIN>; # read one line? NOPE!
Hence the very right warning.
-- Randal L. Schwartz, Perl hacker
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