Fix unittests.

femtools/Supermesh.F90

@@ -290,6 +290,10 @@ subroutine construct_supermesh(new_positions, ele_B, old_positions, map_BA, supe
         assert(continuity(intersection(j)) < 0)
       else
         intersection(j) = intersect_elements(old_positions, ele_A, pos_B, supermesh_shape)
+        if (.not. has_references(intersection(j))) then
+          llnode => llnode%next
+          cycle
+        end if
         assert(continuity(intersection(j)) < 0)
       end if
 

femtools/tests/test_intersection_finder_completeness.F90

@@ -38,6 +38,10 @@ subroutine test_intersection_finder_completeness
     do while(associated(llnode))
       ele_A = llnode%value
       intersection = intersect_elements(positionsA, ele_A, ele_val(positionsB, ele_B), ele_shape(positionsB, ele_B))
+      if (.not. has_references(intersection)) then
+         llnode => llnode%next
+         cycle
+      end if
       do ele_C=1,ele_count(intersection)
         call transform_to_physical(intersection, ele_C, detwei=detwei)
         vols_C = vols_C + sum(detwei)

femtools/tests/test_intersection_finder_completeness_3d.F90

@@ -41,6 +41,10 @@ subroutine test_intersection_finder_completeness_3d
     do while(associated(llnode))
       ele_A = llnode%value
       intersection = intersect_elements(positionsA, ele_A, ele_val(positionsB, ele_B), ele_shape(positionsB, ele_B))
+      if (.not. has_references(intersection)) then
+         llnode => llnode%next
+         cycle
+      end if
       do ele_C=1,ele_count(intersection)
         call transform_to_physical(intersection, ele_C, detwei=detwei)
         vols_C = vols_C + sum(detwei)

femtools/tests/test_quad_supermesh.F90

@@ -59,6 +59,10 @@ subroutine test_quad_supermesh
     do while(associated(llnode))
       ele_A = llnode%value
       intersection = intersect_elements(positionsA, ele_A, ele_val(positionsB, ele_B), supermesh_shape)
+      if (.not. has_references(intersection)) then
+         llnode => llnode%next
+         cycle
+      end if
 #define DUMP_SUPERMESH_INTERSECTIONS
 #ifdef DUMP_SUPERMESH_INTERSECTIONS
       if (ele_count(intersection) /= 0) then

femtools/tests/test_tet_intersector.F90

@@ -47,7 +47,9 @@ subroutine test_tet_intersector
       fail = (vol_libwm .fne. vol_fort)
       call report_test("[tet_intersector volumes]", fail, .false., "Should give the same volumes of intersection")
 
-      call deallocate(libwm)
+      if (has_references(libwm)) then
+         call deallocate(libwm)
+      end if
       if (stat == 0) then
         call deallocate(fort)
       end if

femtools/tests/test_unify_meshes.F90

@@ -64,6 +64,11 @@ subroutine test_unify_meshes
     do while(associated(llnode))
       ele_A = llnode%value
       intersection = intersect_elements(positionsA, ele_A, ele_val(positionsB, ele_B), supermesh_shape)
+      if (.not. has_references(intersection)) then
+          llnode => llnode%next
+          cycle
+      end if
+
       call unify_meshes_quadratic(accum_positions, intersection, accum_positions_tmp)
       call deallocate(accum_positions)
       accum_positions = accum_positions_tmp