add regtest for x-staff beam with script case.

diff --git a/input/regression/beam-cross-staff-script.ly b/input/regression/beam-cross-staff-script.ly
new file mode 100644 (file)
index 0000000..0c5294e
--- /dev/null
+++ b/input/regression/beam-cross-staff-script.ly
@@ -0,0 +1,28 @@
+\header {
+
+  texidoc = "scripts don't trigger beam formatting.  If this
+does happen, we can have a cyclic dependency on Y-positions of
+staves."
+
+}
+
+
+\version "2.11.30"
+
+\new PianoStaff <<
+   \new Staff = RH {
+      \time 1/4
+      c''16 [
+      c''16
+      \change Staff = LH
+      c''16 \tenuto _ \markup { foo }
+      \change Staff = RH
+      c''16 ]
+   }
+   \new Staff = LH {
+      s4
+   }
+>>
+
+%%% END %%%
+