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$ perl -le 'eval q[exit $?0]; print $@'
Number found where operator expected at (eval 1) line 1, near "$?0"
        (Missing operator before 0?)
syntax error at (eval 1) line 1, near "$?0"

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$ perl -le 'eval q[exec env LANG=C $0 ${1+"$@"}]; print $@;'
Can't call method "C" without a package or object reference at (eval 1
+) line 1.