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EXP30:EX0: The -t function should not be used for determining if input is interactive, but it is perfectly valid to determine if output is interactive. So it may be used on *STDOUT or *STDERR.
EXP30:EX1: The behavior of the croak() and carp() functions when invoked inside a signal handler are not documented. Consequently, die() and warn() should be used instead.
Risk Assessment
Using deprecated or obsolete classes or methods in program code can lead to erroneous behavior.
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