I have been beating my head against this for a bit and I feel like I'm fundamentally misunderstanding how eval {} and $@ work. Given the following script with the following following log4perl configuration, I would expect that $@ wouldn't be unset in the middle of the if($@) block. What I'm seeing is that if I call any loglevel method on the $logger object it clears $@. Is this expected behavior?

#!perl

use warnings;
use strict;

use Log::Log4perl;

Log::Log4perl->init_and_watch('yourlogger.conf', 10);

my $logger = Log::Log4perl::get_logger('test_die');

$logger->warn("before eval");

eval {
    die 'foo';
};

if($@) {
    print $@; # I expect this to print "foo", it does
    $logger->debug('test');
    print $@; # I expect this to print "foo", it doesn't!
    print 'after printing $@';
}

print "\n";
[download]

yourlogger.conf:

log4perl.rootLogger = DEBUG, stdout, file

log4perl.appender.stdout = Log::Log4perl::Appender::Screen
log4perl.appender.stdout.layout = Log::Log4perl::Layout::SimpleLayout
log4perl.appender.stdout.stderr = 1
log4perl.appender.stdout.Threshold = DEBUG

log4perl.appender.file = Log::Dispatch::FileRotate
log4perl.appender.file.mode = append
log4perl.appender.file.size = 10_000_000
log4perl.appender.file.max = 10
log4perl.appender.file.filename = foo.txt
log4perl.appender.file.layout=PatternLayout
log4perl.appender.file.layout.ConversionPattern=%H:%P (%c) %p - %d: {%
+X{work}} %m%n
[download]

What am I doing wrong?

---

---

• Are you posting in the right place? Check out Where do I post X? to know for sure.
• Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:

  <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>

• Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
• Want more info? How to link or How to display code and escape characters are good places to start.