Comment # 6 on bug 1127700 from Dr. Werner Fink

 Patch-ID:       bash50-001
 Bug-Description:
  Under certain circumstances, the glob expansion code did not remove
  backslashes escaping characters in directory names (or portions of a
  pattern preceding a slash).

 Patch-ID:       bash50-002
 Bug-Description:
  When an alias value ends with an unquoted literal tab (not part of a quoted
  string or comment), alias expansion cannot correctly detect the end of the
  alias value after expanding it.

It is likly that it may happen during glob expansion ...