Bad layout with fermatas over barlines & linked parts

Ubuntu 14.04, GIT commit: 6084a74

Originally reported in https://musescore.org/en/node/12303#comment-338431

1) load attached file
2) generate parts
3) view parts

Result: fermatas are placed incorrectly on both parts. Not sure what the expected result is exactly (should the fermata after bar 1 have appeared in both parts? maybe only if the barline is extended through both staves?), but the actual result is clearly wrong.

This fixes itself if you save & reload.

However, after saving and reloading, try the following

1) view oboe part
2) add fermata to barline after measure 3
3) view score

Result: so far so good - the original fermatas are present along with the new one

Now, save & reload again. Only the last fermata remains; the originals are gone.

If fermatas are attached to barlines that end up being within mmrests in the parts, more bad things happen, including a crash, although I don't have reproducible steps at this time.