add node for const_ptr_offset feature

RalfJung · RalfJung · commit 5371e4db5973 · 2020-08-10T14:29:33.000+02:00
diff --git a/src/skill_tree.md b/src/skill_tree.md
@@ -93,6 +93,12 @@ requires = [
   "offset_from",
 ]
 
+[[group]]
+name = "offset"
+label = "offset\nfeature:const_ptr_offset"
+href = "https://github.com/rust-lang/rust/issues/71499"
+requires = ["unconst_rules"]
+
 [[group]]
 name = "offset_from"
 label = "offset_from\nfeature:ptr_offset_from"
