p4raw-id: //depot/perl@14142
Other examples include
- $ PERLDB_OPTS="NonStop frame=2" perl -d myprogram
+ $ PERLDB_OPTS="NonStop LineInfo=listing frame=2" perl -d myprogram
which runs script non-interactively, printing info on each entry
into a subroutine and each executed line into the file named F<listing>.