There are two cases when a name is automatically generated.
          fdbg_assign_name(bar(A, [B, C], foobar(D, E)), foo)
          
     will create the following name/term entries:
     | Name | Term/Variable | Selector
 | 
foo  | bar(A, [B, C], foobar(D, E))  | []
 | 
foo_1  | A  | [1]
 | 
foo_2_1  | B  | [2,#1]
 | 
foo_2_2  | C  | [2,#2]
 | 
foo_3_1  | D  | [3,1]
 | 
foo_3_2  | E  | [3,2]
      | 
See FDBG Naming Terms.
fdvar, an
underscore character, and an integer.  The integer is automatically
incremented when necessary.