1\version "2.21.0"
2
3\header {
4  texidoc = "Adding a new staff at a line break doesn't crash."
5}
6
7\score {
8  \new StaffGroup \relative c'' {
9    \new Staff
10    c1 \break
11    << { c1 }
12       \new Staff {
13         c1
14       }
15    >>
16    c1
17  }
18}
19