PDL has a debug mode which tells you in some detail what it's doing, including giving memory addresses (the joy of working in C). I'm currently tracking down the underlying cause of https://github.com/PDLPorters/pdl/issues/356, and have narrowed it down to a small repro case where a command-line switch makes it either croak, or not. Either mode produces several hundred lines of debug output. Diffing the two cases is useless because the addresses get randomised by https://en.wikipedia.org/wiki/Address_space_layout_randomization. If only there were a tool that could consistently pseudonymise those addresses so they get replaced by ADDR1 for the first one, etc, for easier diffing.

Perl to the rescue! 

#!/usr/bin/env perl

# address-pseudonymise [file] or read STDIN

use strict;
use warnings;

my (%addr2number, $i);
while (<>) {
  s:^==\d+==:==[PID]==:; # if you used valgrind, replace process ID
  s:0x([0-9a-f]+):
    '[ADDR'.($addr2number{$1} //= ++$i).']'
  :gie;
  print;
}

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In reply to Hex numbers (e.g. memory addresses) pseudonymising for comparable logging output by etj

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