Dear monks,

while preparing a test case for the perl debugger of perl 5.11.3, i tried to use the '-d' switch in the shebang line of my testscript. I did that in order to make the script selfcontained.

perlrun suggests there is no difference in switches given in the commandline and the shebang line.

However when i started the script without the commandline switch '-d', the initialization for the debugger was incomplete. All line information seemed to be lacking.

Here is the script, which uses some debugger type ahead commands to make it self contained.

#!./perl -wd
use strict; use warnings;
BEGIN {
    push @DB::typeahead, 'b 8', 'L b', 'c', 'q';
    $DB::single = 0;
}

print "Hello\n";
[download]

[Update: I exchanged the originally wrong script with the right one, sorry.]

Here is a session without the -d commandline option. No line information is available. I checked this also interactively with the 'l' debugger command. There is no output. The %DB::dbline hash has not been set up.

heiko@heiko-desktop:~/perl/my_tests$ ~/perl5.11.3 option_d_bug.pl

Loading DB routines from perl5db.pl version 1.33
Editor support available.

Enter h or `h h' for help, or `man perldebug' for more help.

main::(option_d_bug.pl:8):
auto(-4) DB<1> b 8
Line 8 not breakable.
auto(-3) DB<2> L b
auto(-2) DB<3> c
Hello
Debugged program terminated. Use q to quit or R to restart,
use o inhibit_exit to avoid stopping after program termination,
h q, h R or h o to get additional info.
auto(-1) DB<3> q
[download]

Here is the same session with a -d commandline parameter:

heiko@heiko-desktop:~/perl/my_tests$ ~/perl5.11.3 -d option_d_bug.pl

Loading DB routines from perl5db.pl version 1.33
Editor support available.

Enter h or `h h' for help, or `man perldebug' for more help.

main::(option_d_bug.pl:8): print "Hello\n";
auto(-4) DB<1> b 8
auto(-3) DB<2> L b
option_d_bug.pl:
8: print "Hello\n";
break if (1)
auto(-2) DB<3> c
Hello
Debugged program terminated. Use q to quit or R to restart,
use o inhibit_exit to avoid stopping after program termination,
h q, h R or h o to get additional info.
auto(-1) DB<3> q
heiko@heiko-desktop:~/perl/my_tests$
[download]

From my point of view switch processing should be the same in both cases.

Ok, now for the question: Can some kind monk point me to the location in the Perl source, where shebang option processing is taking place? I try to find a fix then.

Thanks a lot, hexcoder

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