#19 blt::hiertable "index" command doesn't work with entry names

[Genia]

Please have a look to the simple test case below:

> more test.tcl
package require BLT
pack [blt::hiertable .t -hideroot 1]
.t column insert end total
.t insert end empty -button 1 -data [list]

> wish8.4 test.tcl
Segmentation fault

Is it a known issue? Can you suggest any solution
workaround ?

Thanks in advance,
Genia