src/libvterm/t/29state_fallback.test

INIT
WANTSTATE f
RESET

!Unrecognised control 
PUSH "\x03"
  control 03

!Unrecognised CSI
PUSH "\e[?15;2z"
  csi 0x7a L=3f 15,2

!Unrecognised OSC
PUSH "\e]27;Something\e\\"
  osc "27;Something"

!Unrecognised DCS
PUSH "\ePz123\e\\"
  dcs "z123"