UBSAN: runtime error: store to misaligned address for type 'uint32' (aka 'unsigned int'), which requires 4 byte alignment in extra/comp_err

/test/11.4_dbg_san/extra/comp_err.c:398:5: runtime error: store to misaligned address 0x7aa942e09026 for type 'uint32' (aka 'unsigned int'), which requires 4 byte alignment

0x7aa942e09026: note: pointer points here

 02 05 01 00 00 00  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  00 00

             ^ 

SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /test/11.4_dbg_san/extra/comp_err.c:398:5 

    /* continue with header of the errmsg.sys file */

    length= (ulong) (my_ftell(to, MYF(0)) - HEADER_LENGTH -

                     (error_count + section_count) * 2);

    bzero((uchar*) head, HEADER_LENGTH);

    bmove((uchar*) head, (uchar*) file_head, 4);

    head[4]= 1;

    int4store(head + 6, length);                                        <<<<<<<<<<<<< Line 398

    int2store(head + 10, max_error);            /* Max error */

    int2store(head + 12, row_nr);

    int2store(head + 14, section_count);