Server hangs on ibuf_merge_or_delete_for_page during shutdown with innodb_fast_shutdown=0

(gdb) p cursor->index->table->space->name

$25 = 0x2b29f7036230 "innodb_system"

(gdb) p index->table->name

$26 =

{m_name = 0x2b2a367ff340 "innodb_change_buffer", static part_suffix = "#P#"}

(gdb) p index->name

$27 =

{m_name = 0x2b2a087db270 "CLUST_IND"}

(gdb) print dict_operation_lock

$36 = {lock_word = 536870912, waiters = 0, sx_recursive = 0, writer_is_wait_ex = false, writer_thread = 0, event = 0x2b2c5deec8d0, wait_ex_event = 0x2b2c5deec940,

cfile_name = 0x55f9dbc4d608 "/local/p4clients/pkgbuild-9zvR5/workspace/src/RDSMariaDB/storage/innobase/dict/dict0dict.cc",

last_x_file_name = 0x55f9dbc41fe0 "/local/p4clients/pkgbuild-9zvR5/workspace/src/RDSMariaDB/storage/innobase/srv/srv0srv.cc", cline = 1097, is_block_lock = 0,

last_x_line = 2025, count_os_wait = 0, list =

{prev = 0x2b29f7027a78, next = 0x2b2a2c3f4120}

, pfs_psi = 0x2b2a0800d680}

(gdb) print dict_sys.mutex

$37 = {m_impl = {m_lock_word = 0, m_event = 0x2b2c5deec860, m_policy = {m_count =

{m_spins = 0, m_waits = 0, m_calls = 0, m_enabled = false}

, m_id = LATCH_ID_DICT_SYS}},

m_ptr = 0x2b29f70bca80}

(gdb) p lock->waiters

$59 = 1

(gdb) p lock->event

$56 = (os_event_t) 0x2b2ac905a9b0

(gdb) p lock->wait_ex_event

$57 = (os_event_t) 0x2b2ac905aa20

(gdb) p lock->waiters

$59 = 1

(gdb) p lock->event

$54 = (os_event_t) 0x2b2ac905a9b0

(gdb) p lock->wait_ex_event

$55 = (os_event_t) 0x2b2ac905aa20