MAP_STACK at 0x800a00000, size 8 GiB
--- /proc/curproc/map entries in range ---
  0x0000000800a00000 0x0000000a00a00000 -1 -1 0 rw- 0 0 0x0000 NCOW NNC none -
wrote *bottom = 'x' (no fault, no growstack)
read *deep (0x8c0a00000) = 0x00 (no fault, no growstack)
RESULT: trig exits 0; guest unaffected. Bug NOT triggered.