...
ps2: ioctl KB_READ
ps2: read_keyboard_packet: enter
SCSI_DSK -- synchronize_cache:
ps2: ps2_interrupt ctrl 0x11, data 0x9c (keyb)
ps2: read_keyboard_packet: scancode: 1c, keydown: false
ps2: ioctl KB_READ
ps2: read_keyboard_packet: enter
117: DEBUGGER: U <= A
debug_server: Thread 117 entered the debugger: Debugger call: `U <= A'
stack trace, current PC 0xffff0102  :
  (0x7ffe5ffc)  0x2ba4a1  __assert_fail + 0x51
  (0x7ffe602c)  0x2c29a1  reuse__Q28BPrivate9hoardHeapi + 0x4e1
  (0x7ffe607c)  0x2c0cbe  malloc__Q28BPrivate10threadHeapUl + 0x276
  (0x7ffe60dc)  0x2c1851  malloc + 0x141
  (0x7ffe610c)  0x24c1dd  xmalloc + 0x21
  (0x7ffe613c)  0x21b354  decode_prompt_string + 0x2c
  (0x7ffe663c)  0x21b1dd  history_delimiting_chars + 0x171 (closest symbol)
  (0x7ffe666c)  0x21875d  execute_prompt_command + 0x20d (closest symbol)
  (0x7ffe668c)  0x216066  yyparse + 0x1d6
  (0x7ffe6ebc)  0x21f2ce  parse_command + 0x7e
  (0x7ffe6edc)  0x21f3ab  read_command + 0xbf
  (0x7ffe6f0c)  0x21f0b5  reader_loop + 0x165
  (0x7ffe6f2c)  0x21d222  main + 0x7a2
  (0x7ffe6f6c)  0x215d63  _start + 0x4f
  (0x7ffe6fac)  0x1007c8  (runtime_loader_seg0ro + 0x7c8)