Segmentation fault

[Mats Bengtsson]

   Hi,

   The following example consistently triggers a core dump. Apparently
   it's an old bug, I tried older versions back to 2.20 with the same
   result.

   \version "2.25.18"
   \relative c'' {
   \stopStaff
   << { b4 s a8 b16 cis b8. a16 } \\ { d,8 cis'16 d e16 d, e fis g4 } >> |
   }
      /Mats