question mark operator has a tracking issue

oli-obk · oli-obk · commit 368107dc0d34 · 2020-08-07T13:57:49.000+02:00
diff --git a/src/skill_tree.md b/src/skill_tree.md
@@ -115,6 +115,7 @@ items = []
 [[group]]
 name = "question_mark"
 label = "using ? in const"
+href = "https://github.com/rust-lang/rust/issues/74935"
 requires = ["trait_impl"]
 items = []
 
