SET NAMES utf8;

CREATE OR REPLACE TABLE t1 (a INT);

INSERT INTO t1 VALUES (1);

SELECT a FROM t1;

#0  my_convert (to=0x7fff8c00dfa9 "def\004test\002t1\002t1\001a\001a\f?", 

    to_length=3, to_cs=0x55555789b500 <my_charset_utf8mb3_general_ci>, 

    from=0x7ffff4bebbc0 "1q\315VUU", from_length=1, 

    from_cs=0x5555577952c0 <my_charset_latin1>, errors=0x7ffff4bebae4)

    at /home/bar/maria-git/server.10.5.clu/strings/ctype.c:1225

#1  0x0000555555d40f3b in copy_and_convert (

    to=0x7fff8c00dfa9 "def\004test\002t1\002t1\001a\001a\f?", to_length=3, 

    to_cs=0x55555789b500 <my_charset_utf8mb3_general_ci>, 

    from=0x7ffff4bebbc0 "1q\315VUU", from_length=1, 

    from_cs=0x5555577952c0 <my_charset_latin1>, errors=0x7ffff4bebae4)

    at /home/bar/maria-git/server.10.5.clu/sql/sql_string.h:51

#2  0x0000555555d3bca3 in Protocol::net_store_data_cs (this=0x7fff8c001340, 

    from=0x7ffff4bebbc0 "1q\315VUU", length=1, 

    from_cs=0x5555577952c0 <my_charset_latin1>, 

    to_cs=0x55555789b500 <my_charset_utf8mb3_general_ci>)

    at /home/bar/maria-git/server.10.5.clu/sql/protocol.cc:118

#3  0x0000555555d3ec51 in Protocol::store_string_aux (this=0x7fff8c001340, 

    from=0x7ffff4bebbc0 "1q\315VUU", length=1, 

    fromcs=0x5555577952c0 <my_charset_latin1>, 

    tocs=0x55555789b500 <my_charset_utf8mb3_general_ci>)

    at /home/bar/maria-git/server.10.5.clu/sql/protocol.cc:1186

#4  0x0000555555d3fa62 in Protocol_text::store (this=0x7fff8c001340, 

    field=0x7fff8c086158)

    at /home/bar/maria-git/server.10.5.clu/sql/protocol.cc:1340

#5  0x00005555561f790f in Item_field::send (this=0x7fff8c016a20, 

    protocol=0x7fff8c001340, buffer=0x7ffff4bebf90)

    at /home/bar/maria-git/server.10.5.clu/sql/item.cc:7229

#6  0x0000555555d3e823 in Protocol::send_result_set_row (this=0x7fff8c001340, 

    row_items=0x7fff8c014ff8)