带有libxml的perl在Windows 10内部用fork静默崩溃

Question

我正在Windows 10下使用安装了最新LibXML（2.0134）的perl 5.24.4。下面是在Windows 10上崩溃的代码（它在Linux上有效）

crash.pl

use strict;
use warnings;

use XML::LibXML;
use Utils;
use Log::Log4perl;


Log::Log4perl->init('logger.conf');
my $logger = Log::Log4perl->get_logger();

sub generate_word_stats_for_chunk
{
    return Utils::load_sql();
}

my $num_process = 4; 
my @modes = (1,3,5);

foreach my $mode (@modes) {


    my @pid_list;
    $logger->info("Forking $num_process");
    for my $i (0 .. $num_process - 1) {
        my $pid = fork();
        $logger->logconfess("Unable to fork $!") if not defined $pid;
        if ($pid == 0) {
            # child process
            generate_word_stats_for_chunk($i);
            sleep 2;

            # make sure that the child process exit
            exit;
    }
    # parent
    # Store the PIDs, so that waitpid() can call them later
    push @pid_list, $pid;
}

for my $pid (@pid_list) {
    waitpid $pid, 0;
}
$logger->info("finished mode $mode");

Utils.pm

package Utils;

use strict;
use warnings;

use XML::LibXML;
use Log::Log4perl;

my $logger = Log::Log4perl->get_logger();

sub load_sql 
{

    $logger->info("parsing XML");   
    my $dom;

    eval {
        $dom  = XML::LibXML->load_xml(location => 'sql.xml');
    };
    if ($@) {
        $logger->error("parse error $@");
        return;
    }
    $logger->info("finished parsing XML");  

    # dummy
    return {};
}

# perl package ends with 1
1;

sql.xml

<?xml version="1.0" encoding="UTF-8"?>    
<sqls>    
    <sql name="CREATE_COMMODITY_META">
        test
    </sql>      
</sqls> 

运行crash.pl给我以下输出

INFO main::(crash.pl:37) Forking 4
INFO Utils::load_sql(Utils.pm:21) parsing XML
INFO Utils::load_sql(Utils.pm:31) finished parsing XML
INFO Utils::load_sql(Utils.pm:21) parsing XML
INFO Utils::load_sql(Utils.pm:31) finished parsing XML
INFO Utils::load_sql(Utils.pm:21) parsing XML
INFO Utils::load_sql(Utils.pm:31) finished parsing XML
INFO Utils::load_sql(Utils.pm:21) parsing XML
INFO Utils::load_sql(Utils.pm:31) finished parsing XML
INFO main::(crash.pl:62) finished mode 1
INFO main::(crash.pl:37) Forking 4
INFO Utils::load_sql(Utils.pm:21) parsing XML
INFO Utils::load_sql(Utils.pm:21) parsing XML
INFO Utils::load_sql(Utils.pm:21) parsing XML
INFO Utils::load_sql(Utils.pm:21) parsing XML

如果我删除Utils::load_sql()语句，该代码将起作用。该可能与Why does Perl crash when using LibXML after a fork?类似，但是我对此有所怀疑，因为该文章中的代码仅适用于机器。如果您删除外部循环（例如foreach my $mode...），则我的代码实际上可以正常工作。我也怀疑该帖子已经有8年历史了。

此外，为什么Utils.pm中的eval语句不能捕获崩溃？