FPE's which are not valid and are not in the form of paths cause a
failure on the parser which invalidates all subsequent FPEs. If
the invalid FPE is the first on the list, this will cause a
fatal-error and the server will abort.

Oneliner patch, reproduced below:
(sent to xorg mailing-list some weeks ago)

---
 difs/fonts.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/difs/fonts.c b/difs/fonts.c
index 2ba7c42..05fef26 100644
--- a/difs/fonts.c
+++ b/difs/fonts.c
@@ -688,6 +688,7 @@ set_font_path_elements(
        {
        NoticeF("ignoring font path element %s (bad font path descriptor)\n", name);
        fsfree(name);
+       cp += len;
        continue;
        }
        /* must be new -- make it */