Here's a one liner that exhibits this oddity... 5.6.1 and 5.00503 on linux:
perl -sle 'print $1' -- -1=foo
/usr/local/bin/perl5.6.1 -sle 'print $1' -- -1=foo
/usr/local/bin/perl5.00503 -sle 'print $1' -- -1=foo
Can you replicate this?
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