From 561d4f74b09613c3edfe659d382fac5abab827ba Mon Sep 17 00:00:00 2001
From: Kevin Gibbons <bakkot@gmail.com>
Date: Wed, 22 Feb 2017 07:24:40 -0800
Subject: [PATCH] Forbid semicolons after decorators in classes (#352)

---
 src/parser/statement.js                                    | 3 +++
 test/fixtures/experimental/decorators/no-semi/actual.js    | 4 ++++
 test/fixtures/experimental/decorators/no-semi/options.json | 3 +++
 3 files changed, 10 insertions(+)
 create mode 100644 test/fixtures/experimental/decorators/no-semi/actual.js
 create mode 100644 test/fixtures/experimental/decorators/no-semi/options.json

diff --git a/src/parser/statement.js b/src/parser/statement.js
index aa0d6abf66..d7073ef1bd 100644
--- a/src/parser/statement.js
+++ b/src/parser/statement.js
@@ -648,6 +648,9 @@ pp.parseClassBody = function (node) {
 
   while (!this.eat(tt.braceR)) {
     if (this.eat(tt.semi)) {
+      if (decorators.length > 0) {
+        this.raise(this.state.lastTokEnd, "Decorators must not be followed by a semicolon");
+      }
       continue;
     }
 
diff --git a/test/fixtures/experimental/decorators/no-semi/actual.js b/test/fixtures/experimental/decorators/no-semi/actual.js
new file mode 100644
index 0000000000..6138e9c6f9
--- /dev/null
+++ b/test/fixtures/experimental/decorators/no-semi/actual.js
@@ -0,0 +1,4 @@
+class A {
+  @a;
+  m(){}
+}
diff --git a/test/fixtures/experimental/decorators/no-semi/options.json b/test/fixtures/experimental/decorators/no-semi/options.json
new file mode 100644
index 0000000000..ffac21b695
--- /dev/null
+++ b/test/fixtures/experimental/decorators/no-semi/options.json
@@ -0,0 +1,3 @@
+{
+  "throws": "Decorators must not be followed by a semicolon (2:5)"
+}