# run using e.g. echo hello | perl this-file
# Why doesn't perl produce a warning from the following. It is an
# infinite loop. If I add a /g modifier to the m// it works fine.
while (<>) {
while (m/([a-z])/) { # warning infinite loop!!!
print $1, "\n"
}
}
///
In general it is hard to detect infinite loops, but in this case it is easy,
because the pattern is a constant. I think this is a very common
special case, and is worth detecting.
Why isn't this done?
I am running perl 5.8
Steve
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