==Python API==

Bugfix #3761: Attempting to set mesh.faceUV=1 when a mesh has no faces
now throws a RuntimeError exception.  Previous behavior was to do nothing.

2 files changed, 8 insertions, 1 deletions

diff --git a/source/blender/python/api2_2x/Mesh.c b/source/blender/python/api2_2x/Mesh.c
index ce131e3851a..9440e15bbd8 100644
--- a/source/blender/python/api2_2x/Mesh.c
+++ b/source/blender/python/api2_2x/Mesh.c
@@ -6042,8 +6042,12 @@ static int Mesh_setFlag( BPy_Mesh * self, PyObject *value, void *type )
 				MEM_freeN( mesh->tface );
 				mesh->tface = NULL;
 			}
-		} else if( !mesh->tface )
+		} else if( !mesh->tface ) {
+			if( !mesh->totface )
+				return EXPP_ReturnIntError( PyExc_RuntimeError,
+					"mesh has no faces" );
 			make_tfaces( mesh );
+		}
 		return 0;
 	case MESH_HASMCOL:
 		if( !param ) {
diff --git a/source/blender/python/api2_2x/doc/Mesh.py b/source/blender/python/api2_2x/doc/Mesh.py
index 82b414c89e7..7711345959e 100644
--- a/source/blender/python/api2_2x/doc/Mesh.py
+++ b/source/blender/python/api2_2x/doc/Mesh.py
@@ -626,6 +626,9 @@ class Mesh:
     be set.  Furthermore, if vertexColors is already set when faceUV is set,
     vertexColors is cleared.  This is because the vertex color information
     is stored with UV faces, so enabling faceUV implies enabling vertexColors.
+    In addition, faceUV cannot be set when the mesh has no faces defined
+    (this is the same behavior as the UI).  Attempting to do so will throw
+    a RuntimeError exception.
   @type faceUV: bool
   @ivar vertexColors: The mesh contains vertex colors.  See L{faceUV} for the
     use of vertex colors when UV-mapped texture faces are enabled.