bug: mtr failed

[hustjieke]

Describe the problem

When run mtr test, got error:

$ ./mysql-test-run.pl --nowarnings --force --suite=stonedb
Can't locate lib/mtr_process.pl in @INC (@INC contains: lib /etc/perl /usr/local/lib/x86_64-linux-gnu/perl/5.30.0 /usr/local/share/perl/5.30.0 /usr/lib/x86_64-linux-gnu/perl5/5.30 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl/5.30 /usr/share/perl/5.30 /usr/local/lib/site_perl /usr/lib/x86_64-linux-gnu/perl-base) at ./mysql-test-run.pl line 103.

Expected behavior

How To Reproduce

Environment

• ubuntu 20.04
• perl version:

$ perl -v

This is perl 5, version 30, subversion 0 (v5.30.0) built for x86_64-linux-gnu-thread-multi

Additional context

[hustjieke]

The solution:
facebook/mysql-5.6#885
But we should checkout if it work well on other system.