For example in the following: 
sub FETCH {
    for (1..3) {
        eval { $x }
    }
}

sub TIEARRAY { bless [] }

my @a;
tie @a, 'main';
$y = $a[0];

[download]
When the tie FETCH method is called, je_mustcatch is set to true, so the first time pp_entertry is called, it pushes a new jump level and enters a new runops loop. The second and third time pp_entertry is called, je_mustcatch is false, so the try block is executed within the current (inner) runops loop.

Dave.

In reply to Re^2: How does CATCH_SET optimize efficiency? by dave_the_m
in thread How does CATCH_SET optimize efficiency? by PerlOnTheWay

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