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I get the same thing, but then, after checking perldoc threads |ack async -C12 I see
async BLOCK; "async" creates a thread to execute the block immediately followin +g it. This block is treated as an anonymous subroutine, and so must have a semicolon after the closing brace. Like "threads->create()" +, "async" returns a *threads* object. $thr->error() Threads are executed in an "eval" context. This method will return "undef" if the thread terminates *normally*. Otherwise, it returns the value of $@ associated with the thread's execution status in i +ts "eval" context.

eval? eval returns undef on failure, so I write

print timedCommand( 3, $cmd, $_ ) || "\$@ $@" for 2, 3, 4; ### LINE B +###
and I get
$ perl huh 1 2 2 1 2 3 3 1 2 3 4 4

In reply to Re: One piece of code, two mysteries! by Anonymous Monk
in thread One piece of code, two mysteries! (UPDATED.) by BrowserUk

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