Document why is and is not a good way to fix the gc_inspection crasher.
diff --git a/Lib/test/crashers/gc_inspection.py b/Lib/test/crashers/gc_inspection.py
index b439ad9..10caa79 100644
--- a/Lib/test/crashers/gc_inspection.py
+++ b/Lib/test/crashers/gc_inspection.py
@@ -1,5 +1,20 @@
"""
gc.get_referrers() can be used to see objects before they are fully built.
+
+Note that this is only an example. There are many ways to crash Python
+by using gc.get_referrers(), as well as many extension modules (even
+when they are using perfectly documented patterns to build objects).
+
+Identifying and removing all places that expose to the GC a
+partially-built object is a long-term project. A patch was proposed on
+SF specifically for this example but I consider fixing just this single
+example a bit pointless (#1517042).
+
+A fix would include a whole-scale code review, possibly with an API
+change to decouple object creation and GC registration, and according
+fixes to the documentation for extension module writers. It's unlikely
+to happen, though. So this is currently classified as
+"gc.get_referrers() is dangerous, use only for debugging".
"""
import gc