this is patch

[ 988698 ] compiler.transformer fix for (a, b) = 1, 2

fixing bug

[ 988613 ] compiler.transformer and tuple unpacking
diff --git a/Lib/compiler/transformer.py b/Lib/compiler/transformer.py
index 6832cf1..aa5a28b 100644
--- a/Lib/compiler/transformer.py
+++ b/Lib/compiler/transformer.py
@@ -929,7 +929,7 @@
         # loop to avoid trivial recursion
         while 1:
             t = node[0]
-            if t == symbol.exprlist or t == symbol.testlist:
+            if t == symbol.exprlist or t == symbol.testlist or t == symbol.testlist_gexp:
                 if len(node) > 2:
                     return self.com_assign_tuple(node, assigning)
                 node = node[1]