aa-mergeprof crash with global include if merging profile that doesn't exist in target directory

# head `find -type f`
==> ./old/bin.false <==
#include <tunables/global>
/bin/false {
}

==> ./old/tunables/global <==

==> ./new/bin.true <==
/bin/true {
  /bin/true r,

}

==> ./new/tunables/global <==

# cd new
# aa-mergeprof -d . ../old/bin.false

Merging profile for /bin/false

File includes: Select the ones you wish to add

 [1 - #include <tunables/global>]
[(A)llow] / (I)gnore / Abo(r)t / (F)inish <---- press "a"
Adding #include <tunables/global> to the file.
Traceback (most recent call last):
  File "/home/cb/apparmor/HEAD-clean/utils/aa-mergeprof", line 795, in <module>
    main()
  File "/home/cb/apparmor/HEAD-clean/utils/aa-mergeprof", line 113, in main
    act([user_file, base_file, None], 2, profile_name)
  File "/home/cb/apparmor/HEAD-clean/utils/aa-mergeprof", line 146, in act
    program = programs[0]
IndexError: list index out of range