When searching a reasonably large directory tree (~8GB, 19M lines of code), using simple pattern matching (no flags) I get segfaults at least half the time.
system:
Darwin 14.5.0 Darwin Kernel Version 14.5.0: Tue Sep 1 21:23:09 PDT 2015; root:xnu-2782.50.1~1/RELEASE_X86_64 x86_64