Yep, and the crash reporter gives:

  Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
  0   libsystem_platform.dylib      	0x00007fffxxxxxxxx _platform_memchr$VARIANT$Haswell + 101
  1   libsystem_c.dylib             	0x00007fffxxxxxxxx __sfvwrite + 268
  2   libsystem_c.dylib             	0x00007fffxxxxxxxx fwrite + 142
  3   grep                          	0x00000001xxxxxxxx 0x10xxxxxxx + 13606
  4   grep                          	0x00000001xxxxxxxx 0x10xxxxxxx + 12465
  5   grep                          	0x00000001xxxxxxxx 0x10xxxxxxx + 8190
  6   libdyld.dylib                 	0x00007fffxxxxxxxx start + 1

A different version from yours though:

  what /usr/bin/grep
    PROGRAM:grep  PROJECT:bsdgrep-17