Assertion failure / incorrect behavior on Shift+Left of volta start grip
Ubuntu 14.04, GIT commit: 2e2aa1c
1) new / empty score
2) add volta to any measure but first
3) double click
4) click start grip
Result: crash - or more particularly, assertion failure (so results may diffier if not running a debug build, I guess).
The failure occurs in Measure::remove(), where we are trying to remove the line from the measure. The parent of the line is null. If I bypass assert, though, it still doesn't behave well - the end point of the volta moves too.