Test perl #112312, crash on syntax error

Test perl #112312, crash on syntax error

I am having difficulty getting these tests to fail.  They crash when
run standalone, but always pass when run via fresh_perl.t.  Hopefully,
they will fail somewhere. :-)

Yes, fresh_perl.t does begin with this:

# ** DO NOT ADD ANY MORE TESTS HERE **

But t/comp/parser.t does not (and should not) use test.pl, so it is
very hard to test something like this.

Putting it here seemed slightly better than putting it in
its own file.