Spoilers:

Update: and here's an answer for 8, although you might take it as cheating as it requires an adittional option on the command line to be set.

Update: you can give the switch in the shebang line too. If you write this to a file and execute it with perl, it works.

#!perl -d
sub DB::DB { ++$foo==2 and die "break out the eval"; }; !eval { [ @foo
+ ] } and print "Ok!\n";
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