From 80fd31a37252cc109f297637422e7d94f2213754 Mon Sep 17 00:00:00 2001
From: Brandt Bucher <brandtbucher@gmail.com>
Date: Fri, 6 Mar 2020 23:03:14 -0800
Subject: [PATCH 1/4] Don't mangle the AST when compiling.

---
 Python/compile.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Python/compile.c b/Python/compile.c
index f603e3d29e539d..f228e16079b289 100644
--- a/Python/compile.c
+++ b/Python/compile.c
@@ -3765,7 +3765,6 @@ assignment_helper(struct compiler *c, asdl_seq *elts)
                     "star-unpacking assignment");
             ADDOP_I(c, UNPACK_EX, (i + ((n-i-1) << 8)));
             seen_star = 1;
-            asdl_seq_SET(elts, i, elt->v.Starred.value);
         }
         else if (elt->kind == Starred_kind) {
             return compiler_error(c,
@@ -3775,7 +3774,10 @@ assignment_helper(struct compiler *c, asdl_seq *elts)
     if (!seen_star) {
         ADDOP_I(c, UNPACK_SEQUENCE, n);
     }
-    VISIT_SEQ(c, expr, elts);
+    for (i = 0; i < n; i++) {
+        expr_ty elt = asdl_seq_GET(elts, i);
+        VISIT(c, expr, elt->kind != Starred_kind ? elt : elt->v.Starred.value);
+    }
     return 1;
 }
 

From 0cad932a0c697e55bab4a5200c21f8142e95864c Mon Sep 17 00:00:00 2001
From: Brandt Bucher <brandtbucher@gmail.com>
Date: Sat, 7 Mar 2020 12:35:39 -0800
Subject: [PATCH 2/4] Add NEWS entry.

---
 .../Core and Builtins/2020-03-07-12-35-31.bpo-39890.zr6CNx.rst   | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 Misc/NEWS.d/next/Core and Builtins/2020-03-07-12-35-31.bpo-39890.zr6CNx.rst

diff --git a/Misc/NEWS.d/next/Core and Builtins/2020-03-07-12-35-31.bpo-39890.zr6CNx.rst b/Misc/NEWS.d/next/Core and Builtins/2020-03-07-12-35-31.bpo-39890.zr6CNx.rst
new file mode 100644
index 00000000000000..8f83929797fc13
--- /dev/null
+++ b/Misc/NEWS.d/next/Core and Builtins/2020-03-07-12-35-31.bpo-39890.zr6CNx.rst	
@@ -0,0 +1 @@
+Don't mutate the ast when compiling starred assignments.

From a4f0fe38957d15575fc2e5a2266c2e5dfd1e7187 Mon Sep 17 00:00:00 2001
From: Brandt Bucher <brandtbucher@gmail.com>
Date: Sat, 7 Mar 2020 12:38:32 -0800
Subject: [PATCH 3/4] Capitalize AST.

---
 .../Core and Builtins/2020-03-07-12-35-31.bpo-39890.zr6CNx.rst  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Misc/NEWS.d/next/Core and Builtins/2020-03-07-12-35-31.bpo-39890.zr6CNx.rst b/Misc/NEWS.d/next/Core and Builtins/2020-03-07-12-35-31.bpo-39890.zr6CNx.rst
index 8f83929797fc13..64c4a5dd7d7d04 100644
--- a/Misc/NEWS.d/next/Core and Builtins/2020-03-07-12-35-31.bpo-39890.zr6CNx.rst	
+++ b/Misc/NEWS.d/next/Core and Builtins/2020-03-07-12-35-31.bpo-39890.zr6CNx.rst	
@@ -1 +1 @@
-Don't mutate the ast when compiling starred assignments.
+Don't mutate the AST when compiling starred assignments.

From 07a12a9641e6190dda586294df8c992c0718934a Mon Sep 17 00:00:00 2001
From: Brandt Bucher <brandtbucher@gmail.com>
Date: Sat, 7 Mar 2020 18:50:11 -0800
Subject: [PATCH 4/4] Drop NEWS.

---
 .../Core and Builtins/2020-03-07-12-35-31.bpo-39890.zr6CNx.rst   | 1 -
 1 file changed, 1 deletion(-)
 delete mode 100644 Misc/NEWS.d/next/Core and Builtins/2020-03-07-12-35-31.bpo-39890.zr6CNx.rst

diff --git a/Misc/NEWS.d/next/Core and Builtins/2020-03-07-12-35-31.bpo-39890.zr6CNx.rst b/Misc/NEWS.d/next/Core and Builtins/2020-03-07-12-35-31.bpo-39890.zr6CNx.rst
deleted file mode 100644
index 64c4a5dd7d7d04..00000000000000
--- a/Misc/NEWS.d/next/Core and Builtins/2020-03-07-12-35-31.bpo-39890.zr6CNx.rst	
+++ /dev/null
@@ -1 +0,0 @@
-Don't mutate the AST when compiling starred assignments.