openLP crashes completely when [---] is incorrectly used.

[Frank]

There are at least two ways to let openLP crash with [---]

way 1:
When a song has two splits in a row like:
songline one
songline two
songline three
[---]
[---]
songline after split
songline after split 2

save the song (with the title "2 song with a problem") and OpenLP crasht.
when you open OpenLP again and select the corupt song it crash again.
Note: if the verse is not large enough to split, there will be no problems make the verse bigger to let openLP crash.

way 2:
use [---] within a line of your song and you get the same problem.

! How to remove the corrupt song !
make a song a with the title "1 song song above the problem song"
and make a other one with the title "3 song below the song with a problem"
now select "1 song song above the problem song" hold shift and select "3 song below the song with a problem" and press "delete" on your keyboard. now all songs are gone and openLP don't crash any more.

Operating system:
Windows 7
openLP version:
1.9.7 build 1787 &
1.9.7 build 1790

I found the bug when I imported a lot of songs. from a bad database.