LOAD DATA LOCAL INFILE crashes the server on loading a backslash followed by a multi-byte character

DROP TABLE IF EXISTS t1;

CREATE TABLE t1 (

  a int NOT NULL,

  b int NOT NULL,

  c int NOT NULL,

  d int NOT NULL,

  e int NOT NULL,

  f int NOT NULL,

  g int NOT NULL,

  h int NOT NULL,

  i int NOT NULL,

  j int NOT NULL,

  k int NOT NULL,

  l double NOT NULL,

  q varchar(2048) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT ''

);

LOAD DATA LOCAL INFILE '/tmp/data.txt'

INTO TABLE t1 CHARACTER SET utf8

FIELDS TERMINATED BY '\t' ENCLOSED BY '' ESCAPED BY '\\'

LINES TERMINATED BY '\n';

#0  0x00007ffff5dc4a98 in __GI_raise (sig=sig@entry=6)

    at ../sysdeps/unix/sysv/linux/raise.c:55

#1  0x00007ffff5dc669a in __GI_abort () at abort.c:89

#2  0x00007ffff5dbd227 in __assert_fail_base (fmt=<optimized out>, 

    assertion=assertion@entry=0xe81576 "0", 

    file=file@entry=0xe81280 "/home/bar/maria-git/server-10.0.load-local/sql/net_serv.cc", line=line@entry=1074, 

    function=function@entry=0xe815c0 <my_real_read(st_net*, unsigned long*, char)::__PRETTY_FUNCTION__> "ulong my_real_read(NET*, size_t*, my_bool)")

    at assert.c:92

#3  0x00007ffff5dbd2d2 in __GI___assert_fail (assertion=0xe81576 "0", 

    file=0xe81280 "/home/bar/maria-git/server-10.0.load-local/sql/net_serv.cc", line=1074, 

    function=0xe815c0 <my_real_read(st_net*, unsigned long*, char)::__PRETTY_FUNCTION__> "ulong my_real_read(NET*, size_t*, my_bool)") at assert.c:101

#4  0x00000000005999a1 in my_real_read (net=0x7ffff40cf328, 

    complen=0x7ffff7f7c3b0, header=0 '\000')

    at /home/bar/maria-git/server-10.0.load-local/sql/net_serv.cc:1074

#5  0x0000000000599a05 in my_net_read_packet (net=0x7ffff40cf328, 

    read_from_server=0 '\000')

    at /home/bar/maria-git/server-10.0.load-local/sql/net_serv.cc:1137

#6  0x00000000009cc257 in _my_b_net_read (info=0x7ffff7f7c618, 

    Buffer=0x7ffff7f7c48f "", Count=1)

    at /home/bar/maria-git/server-10.0.load-local/sql/mf_iocache.cc:61

#7  0x0000000000e0731f in _my_b_get (info=0x7ffff7f7c618)

    at /home/bar/maria-git/server-10.0.load-local/mysys/mf_iocache.c:1509

#8  0x000000000099ca59 in READ_INFO::skip_data_till_eof (this=0x7ffff7f7c5a0)

    at /home/bar/maria-git/server-10.0.load-local/sql/sql_load.cc:128

#9  0x00000000009970f5 in mysql_load (thd=0x7ffff40cf070, ex=0x7ffed1822240, 

    table_list=0x7ffed18222c8, fields_vars=..., set_fields=..., 

    set_values=..., handle_duplicates=DUP_ERROR, ignore=true, 

    read_file_from_client=true)

    at /home/bar/maria-git/server-10.0.load-local/sql/sql_load.cc:562 at