remap rule error! something failed during BuildTable() -- check your remap plugins!

vim remap.conf
map http://www.b.com/ http://172.16.1.15:8080/
regex_map http://([a-zA-Z\.-_]+)/ http://$1

ats removed the regex_map flag ??

[TrafficServer] using root directory '/usr'
[May 29 11:01:45.085] Manager

{0x7fa3980f57e0} NOTE: [LocalManager::pollMgmtProcessServer] New process connecting fd '11'
[May 29 11:01:45.085] Manager {0x7fa3980f57e0}

NOTE: [Alarms::signalAlarm] Server Process born
[May 29 11:01:46.106]

{0x2b5c7aea8e00} STATUS: opened /var/log/trafficserver/diags.log
[May 29 11:01:46.106] {0x2b5c7aea8e00}

NOTE: updated diags config
[May 29 11:01:46.112] Server

{0x2b5c7aea8e00} NOTE: cache clustering disabled
[May 29 11:01:46.143] Server {0x2b5c7aea8e00}

NOTE: cache clustering disabled
[May 29 11:01:46.162] Server

{0x2b5c7aea8e00} NOTE: logging initialized[15], logging_mode = 3
[May 29 11:01:46.193] Server {0x2b5c7aea8e00}

WARNING: Could not add rule at line #2; Aborting!
[May 29 11:01:46.193] Server

{0x2b5c7aea8e00} WARNING: [ReverseProxy] Malformed From URL at line 2
[May 29 11:01:46.193] Server {0x2b5c7aea8e00}

WARNING: something failed during BuildTable() – check your remap plugins!
[May 29 11:01:46.193] Server

{0x2b5c7aea8e00}

WARNING: Can not load the remap table, exiting out!
[May 29 11:01:46.226] Manager

{0x7fa3980f57e0} ERROR: [Alarms::signalAlarm] Server Process was reset
[May 29 11:01:46.226] Manager {0x7fa3980f57e0}

ERROR: (last system error 2: No such file or directory)
[May 29 11:01:47.232] Manager

{0x7fa3980f57e0}

NOTE: [LocalManager::startProxy] Launching ts process