Disable freelist command line option fails under ASAN

[bcall@homer trafficserver]$ sudo /usr/local/bin/traffic_server -f
traffic_server: using root directory '/usr/local'
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==877==ERROR: AddressSanitizer: global-buffer-overflow on address 0x00000117a3e0 at pc 0x7f6685cd2d9b bp 0x7ffc4f8cfaa0 sp 0x7ffc4f8cfa90
READ of size 4 at 0x00000117a3e0 thread T0
    #0 0x7f6685cd2d9a in process_arg /home/bcall/dev/apache/trafficserver/lib/ts/ink_args.cc:89
    #1 0x7f6685cd34a5 in process_args_ex(AppVersionInfo const*, ArgumentDescription const*, unsigned int, char const**) /home/bcall/dev/apache/trafficserver/lib/ts/ink_args.cc:238
    #2 0x7f6685cd3f2a in process_args(AppVersionInfo const*, ArgumentDescription const*, unsigned int, char const**, char const*) /home/bcall/dev/apache/trafficserver/lib/ts/ink_args.cc:167
    #3 0x494c10 in main /home/bcall/dev/apache/trafficserver/proxy/Main.cc:1498
    #4 0x7f6682f6e6ff in __libc_start_main (/lib64/libc.so.6+0x206ff)
    #5 0x4a6d88 in _start (/usr/local/bin/traffic_server+0x4a6d88)

0x00000117a3e1 is located 0 bytes to the right of global variable 'cmd_disable_freelist' defined in 'Main.cc:169:13' (0x117a3e0) of size 1
  'cmd_disable_freelist' is ascii string ''
SUMMARY: AddressSanitizer: global-buffer-overflow /home/bcall/dev/apache/trafficserver/lib/ts/ink_args.cc:89 process_arg
Shadow bytes around the buggy address:
  0x000080227420: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x000080227430: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x000080227440: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x000080227450: 00 00 00 00 00 00 00 00 00 00 00 00 04 f9 f9 f9
  0x000080227460: f9 f9 f9 f9 04 f9 f9 f9 f9 f9 f9 f9 01 f9 f9 f9
=>0x000080227470: f9 f9 f9 f9 01 f9 f9 f9 f9 f9 f9 f9[01]f9 f9 f9
  0x000080227480: f9 f9 f9 f9 04 f9 f9 f9 f9 f9 f9 f9 04 f9 f9 f9
  0x000080227490: f9 f9 f9 f9 00 f9 f9 f9 f9 f9 f9 f9 00 f9 f9 f9
  0x0000802274a0: f9 f9 f9 f9 04 f9 f9 f9 f9 f9 f9 f9 00 00 00 00
  0x0000802274b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0000802274c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Shadow byte legend (one shadow byte represents 8 application bytes):
  Addressable:           00
  Partially addressable: 01 02 03 04 05 06 07
  Heap left redzone:       fa
  Heap right redzone:      fb
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack partial redzone:   f4
  Stack after return:      f5
  Stack use after scope:   f8
  Global redzone:          f9
  Global init order:       f6
  Poisoned by user:        f7
  Container overflow:      fc
  Array cookie:            ac
  Intra object redzone:    bb
  ASan internal:           fe
==877==ABORTING