OCCT

puts "=============================================================="
puts "0027913: Sharing between edges was lost after offset operation"
puts "=============================================================="
puts ""

restore [locate_data_file bug27913.brep] s 
offsetparameter 1e-7 p i
offsetload s 10
offsetperform result

if { [isdraw result] } {
 unifysamedom result_unif result

 checkshape result
 checkview -display result_unif -2d -path ${imagedir}/${test_image}.png

 checknbshapes result -ref [lrange [nbshapes s] 8 19]
}