Comment 8 for bug 675185

I tested the testcase in the commit on Precise and there seem to no issue there
(probably fixed there).

Also, it is not the right approach to change #!/bin/sh to #!/bin/bash since
former invokes POSIX compatibility mode and if dash has problems on any
platform, then that should be fixed rather than changing it in mysqld_safe or
#!/bin/sh needs to pointed elsewhere (or with update-alternatives).

Regarding the init scripts, I see that Percona Server is not packaged with
upstart script (hence vulnerable to this if on a platform with a buggy dash) as
mysql-server-55 does. I will open a separate issue to add that.