Make PyTraceBack_Here use the current thread, not the
frame's thread state. Fixes #1579370.
diff --git a/Misc/NEWS b/Misc/NEWS
index f30f50b..fc5dd66 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,9 @@
 Core and builtins
 -----------------
 
+- Bug #1579370: Make PyTraceBack_Here use the current thread, not the
+  frame's thread state.
+
 - patch #1630975: Fix crash when replacing sys.stdout in sitecustomize.py
 
 - Bug #1637022: Prefix AST symbols with _Py_.