builder-test.patch

diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 1a53e8cdd..bbf92481c 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -23,7 +23,7 @@ set (cpptests
     )
 set (alias_parts 1)
 set (automorphism_parts 1 2 3 4 5 6 7 8 9 10)
-set (builder_parts 1 2 3 4 5)
+set (builder_parts 1 2 3 4 5 6)
 set (canonconsistent_parts  1 2 3)
 set (canonfragment_parts 1)
 set (canonstable_parts 1)
diff --git a/test/buildertest.cpp b/test/buildertest.cpp
index ff7f06a89..fc2e871c8 100644
--- a/test/buildertest.cpp
+++ b/test/buildertest.cpp
@@ -96,7 +96,7 @@ bool doSMILESBuilderTest(string smiles)
 
   OBBuilder builder;
   OB_REQUIRE(builder.Build(mol, false)); // some stereo errors are known
-  return mol.Has3D();
+  return (mol.Has3D() && mol.HasNonZeroCoords());
 }
 
 int buildertest(int argc, char* argv[])
@@ -147,6 +147,10 @@ int buildertest(int argc, char* argv[])
     // from Martin Guetlein -- PR#3107218 ("OBBuilder terminates while building 3d")
     OB_ASSERT( doSMILESBuilderTest("N12[C@@H]([C@@H](NC([C@@H](c3ccsc3)C(=O)O)=O)C2=O)SC(C)(C)[C@@-]1C(=O)O") );
     break;
+  case 6:
+    // from Hubertus van Dam -- #2144
+    OB_ASSERT( doSMILESBuilderTest("OC1(C2=CN(CC3=CC=CC=C3F)N=N2)CCOC1") );
+    break;
   default:
     cout << "Test number " << choice << " does not exist!\n";
     return -1;