Add regtest for staff symbol segmentation fault.

diff --git a/input/regression/staff-online-symbol-absence.ly b/input/regression/staff-online-symbol-absence.ly
new file mode 100644 (file)
index 0000000..f822b72
--- /dev/null
+++ b/input/regression/staff-online-symbol-absence.ly
@@ -0,0 +1,16 @@
+\version "2.11.55"
+\header {
+
+  texidoc = "Symbols that need on-staffline info (like dots and ties)
+  continue to work in absence of a staff-symbol."
+
+}
+
+\new Staff \with {
+  \remove Staff_symbol_engraver
+}
+\relative c' {
+       \time 5/8
+       f4 ~ f4 
+       f4 f4.
+}