bug#15750: Acknowledgement (segfault during snarf-check-and-output-texi on x86_64-darwin11 (guile-2.0.9))

[David Fang]

On x86_64-darwin11 (clang-built, -g -O2), the exit status of the failure 
is not even consistent from run-to-run, nondeterministic behaviour!

example log:
http://paste.lisp.org/display/139704#8
Fang