diff --git a/CHANGELOG.md b/CHANGELOG.md
index 586f7a14e3..c42b6f67e8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+# 1.12.8
+
+ * Temporarily forbid `AssignmentExpression` destructuring outside of `ExpressionStatement`.
+
 # 1.12.7
 
  * Update to latest `acorn-6to5`.
diff --git a/lib/6to5/transformation/transformers/destructuring.js b/lib/6to5/transformation/transformers/destructuring.js
index 67690661e5..a1fb9627df 100644
--- a/lib/6to5/transformation/transformers/destructuring.js
+++ b/lib/6to5/transformation/transformers/destructuring.js
@@ -146,6 +146,12 @@ exports.ExpressionStatement = function (node, parent, file, scope) {
   return nodes;
 };
 
+exports.AssignmentExpression = function (node, parent, file) {
+  if (parent.type === "ExpressionStatement") return;
+  if (!t.isPattern(node.left)) return;
+  throw file.errorWithNode(node, "AssignmentExpression destructuring outside of a ExpressionStatement is forbidden due to current limitations");
+};
+
 exports.VariableDeclaration = function (node, parent, file, scope) {
   if (t.isForInStatement(parent) || t.isForOfStatement(parent)) return;
 
diff --git a/test/fixtures/transformation/destructuring/assignment-expression/actual.js b/test/fixtures/transformation/destructuring/assignment-expression/actual.js
new file mode 100644
index 0000000000..2ebf93ff16
--- /dev/null
+++ b/test/fixtures/transformation/destructuring/assignment-expression/actual.js
@@ -0,0 +1 @@
+console.log([x] = [123]);
diff --git a/test/fixtures/transformation/destructuring/assignment-expression/options.json b/test/fixtures/transformation/destructuring/assignment-expression/options.json
new file mode 100644
index 0000000000..d0680c1c5d
--- /dev/null
+++ b/test/fixtures/transformation/destructuring/assignment-expression/options.json
@@ -0,0 +1,3 @@
+{
+  "throws": "AssignmentExpression destructuring outside of a ExpressionStatement is forbidden due to current limitations"
+}
diff --git a/test/fixtures/transformation/destructuring/assignment/actual.js b/test/fixtures/transformation/destructuring/assignment-statement/actual.js
similarity index 100%
rename from test/fixtures/transformation/destructuring/assignment/actual.js
rename to test/fixtures/transformation/destructuring/assignment-statement/actual.js
diff --git a/test/fixtures/transformation/destructuring/assignment/expected.js b/test/fixtures/transformation/destructuring/assignment-statement/expected.js
similarity index 100%
rename from test/fixtures/transformation/destructuring/assignment/expected.js
rename to test/fixtures/transformation/destructuring/assignment-statement/expected.js