Crashed at json_out_stat() with sprintf format mismatch

(gdb) where
#0  0x00002aaaae7d662e in _IO_default_xsputn_internal () from /lib64/libc.so.6
#1  0x00002aaaae7a732a in vfprintf () from /lib64/libc.so.6
#2  0x00002aaaae861aa0 in __vsnprintf_chk () from /lib64/libc.so.6
#3  0x00002aaaae8619da in __snprintf_chk () from /lib64/libc.so.6
#4  0x00002aaab77f2617 in snprintf (rec_type=<value optimized out>, edata=0x2ae56bb16c80, registered=<value optimized out>, name=<value optimized out>, data_type=<value optimized out>,
    datum=<value optimized out>) at /usr/include/bits/stdio2.h:65
#5  json_out_stat (rec_type=<value optimized out>, edata=0x2ae56bb16c80, registered=<value optimized out>, name=<value optimized out>, data_type=<value optimized out>, datum=<value optimized out>)
    at stats_over_http.c:176
#6  0x00002aaaaae46ac5 in RecDumpRecords (rec_type=38, callback=0x2aaab77f2540 <json_out_stat>, edata=0x2ae56bb16c80) at RecCore.cc:963
#7  0x00002aaab77f2891 in json_out_stats (contp=<value optimized out>, event=TS_EVENT_VCONN_WRITE_READY, edata=0x2abca167bf70) at stats_over_http.c:189
#8  stats_process_write (contp=<value optimized out>, event=TS_EVENT_VCONN_WRITE_READY, edata=0x2abca167bf70) at stats_over_http.c:204
#9  stats_dostuff (contp=<value optimized out>, event=TS_EVENT_VCONN_WRITE_READY, edata=0x2abca167bf70) at stats_over_http.c:227
#10 0x00002aaaaabc7b1a in PluginVC::process_write_side (this=0x2abca167be20, other_side_call=false) at PluginVC.cc:547
#11 0x00002aaaaabc9be5 in PluginVC::main_handler (this=0x2abca167be20, event=<value optimized out>, data=0x2aaab2c26840) at PluginVC.cc:208
#12 0x00002aaaaae545b8 in handleEvent (this=0x2aaab23a0000, e=0x2aaab2c26840, calling_code=1) at I_Continuation.h:145
#13 EThread::process_event (this=0x2aaab23a0000, e=0x2aaab2c26840, calling_code=1) at UnixEThread.cc:128
#14 0x00002aaaaae54edb in EThread::execute (this=0x2aaab23a0000) at UnixEThread.cc:179
#15 0x00002aaaaae5398a in spawn_thread_internal (a=0x2aaaab8124f0) at Thread.cc:85
#16 0x00002aaaac9439d1 in start_thread () from /lib64/libpthread.so.0
#17 0x00002aaaae84a8fd in clone () from /lib64/libc.so.6
(gdb) f 6
#6  0x00002aaaaae46ac5 in RecDumpRecords (rec_type=38, callback=0x2aaab77f2540 <json_out_stat>, edata=0x2ae56bb16c80) at RecCore.cc:963
963	in RecCore.cc
(gdb) p rec_type
$20 = 38
(gdb) p edata
$21 = (void *) 0x2ae56bb16c80
(gdb) p r->registered
$22 = true
(gdb) p r->name
$23 = 0x2aaaab7ba580 "proxy.process.ssl.origin_server_decryption_failed"
(gdb) p r->data_type
$24 = RECD_INT
(gdb) p &r->data
$25 = (RecData *) 0x2aaaab76f380
(gdb)