set substitute [subcommand]
Sometimes the filename or line ranges reported inside the debugger might not match the filenames or line ranges where you can find the source in the OS filesystem. This may happen because of pathnames do not match or program text comes from evaluated lines in code.
set substitute path, and set substitute string.
set substitute path
set substitute string
To install Devel::Trepan, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Devel::Trepan
CPAN shell
perl -MCPAN -e shell install Devel::Trepan
For more information on module installation, please visit the detailed CPAN module installation guide.