puts "========"
puts "OCC26420"
puts "========"
puts ""
######################################################
# BOPAlgo_Builder resets "Closed" flag in the result
######################################################

polyline pp 0 4 0 7 4 0 7 6 0 0 6 0 0 4 0
vertex v0 5 4 0
vertex v1 4 6 0
bclearobjects
bcleartools
baddobjects v0 v1 pp
bfillds
bbuild r
explode r w
set bug_info [whatis r_1]
if {[lindex $bug_info 8] != "Closed"} {
  puts "ERROR: OCC26420 is reproduced. Flag CLOSED is not set."
}