xterm crash

xterm: warning, error event received:
X Error of failed request:  BadValue (integer parameter out of range for operation)
  Major opcode of failed request:  135 (XKEYBOARD)
  Minor opcode of failed request:  8 (XkbGetMap)
  Value in failed request:  0x6070008
  Serial number of failed request:  490
  Current serial number in output stream:  490