From b6427cc203adb33aae22e565785824df010b232e Mon Sep 17 00:00:00 2001
From: Timothy McClure <tmcclure5@bloomberg.net>
Date: Thu, 27 Dec 2018 11:04:32 -0500
Subject: [PATCH] Fix private dupe name check

---
 .../src/index.js                              | 35 +++++++++++--------
 1 file changed, 20 insertions(+), 15 deletions(-)

diff --git a/packages/babel-helper-create-class-features-plugin/src/index.js b/packages/babel-helper-create-class-features-plugin/src/index.js
index 9d92d715ecea..3c0dd6180295 100644
--- a/packages/babel-helper-create-class-features-plugin/src/index.js
+++ b/packages/babel-helper-create-class-features-plugin/src/index.js
@@ -75,32 +75,37 @@ export function createClassFeaturePlugin({
 
           if (path.isPrivate()) {
             const { name } = path.node.key.id;
-            const getName = `get_${name}`;
-            const setName = `set_${name}`;
+            const getName = `get ${name}`;
+            const setName = `set ${name}`;
 
             if (path.node.kind === "get") {
-              if (privateNames.has(getName)) {
+              if (
+                privateNames.has(getName) ||
+                (privateNames.has(name) && !privateNames.has(setName))
+              ) {
                 throw path.buildCodeFrameError("Duplicate private field");
               }
 
-              privateNames.add(getName);
+              privateNames.add(getName).add(name);
             } else if (path.node.kind === "set") {
-              if (privateNames.has(setName)) {
+              if (
+                privateNames.has(setName) ||
+                (privateNames.has(name) && !privateNames.has(getName))
+              ) {
                 throw path.buildCodeFrameError("Duplicate private field");
               }
 
-              privateNames.add(setName);
-            }
+              privateNames.add(setName).add(name);
+            } else {
+              if (
+                privateNames.has(name) &&
+                (privateNames.has(getName) || privateNames.has(setName))
+              ) {
+                throw path.buildCodeFrameError("Duplicate private field");
+              }
 
-            if (
-              privateNames.has(name) &&
-              !privateNames.has(getName) &&
-              !privateNames.has(setName)
-            ) {
-              throw path.buildCodeFrameError("Duplicate private field");
+              privateNames.add(name);
             }
-
-            privateNames.add(name);
           }
 
           if (path.isClassMethod({ kind: "constructor" })) {