Comment #152 on issue 2148 by [email protected]: vertical skylines should use stencil integrals
http://code.google.com/p/lilypond/issues/detail?id=2148
GCC is very sensitive to unreliable memory. I remember systems that ran without any apparent problem for days and weeks (and would have no problems running memtest for any amount of time) but it was impossible to recompile the Linux kernel. I don't know why GCC would be affected stronger than most other applications, but that's the way it is. Probably something with access patterns, in case refresh is unreliable.
GCC is a rather deterministic application. If it segfaults, but not predictably, that very much points to a memory problem.
