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Perl Language Reference Manual
by Larry Wall and others
Paperback (6"x9"), 724 pages
ISBN 9781906966027
RRP £29.95 ($39.95)

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'%s' trapped by operation mask

(F) You tried to use an operator from a Safe compartment in which it's disallowed. See "Compile and execute code in restricted compartments" (Safe) in the Perl Library Reference Manual (Volume 2).

ISBN 9781906966027Perl Language Reference ManualSee the print edition