From a637ca55dc3ce38e668aaab7d5d4ebb752cb9b09 Mon Sep 17 00:00:00 2001
From: yuche <i@yuche.me>
Date: Mon, 18 Feb 2019 20:38:08 +0800
Subject: [PATCH] =?UTF-8?q?fix(transformer):=20=E5=BD=93=E6=9C=AC=E5=9C=B0?=
 =?UTF-8?q?=E5=8F=98=E9=87=8F=E5=92=8C=E5=BE=AA=E7=8E=AF=E5=8F=98=E9=87=8F?=
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 =?UTF-8?q?=E5=8A=A0=E5=85=A5=20usedState=20=E5=92=8C=20pendingState,=20#2?=
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---
 packages/taro-transformer-wx/src/render.ts | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/packages/taro-transformer-wx/src/render.ts b/packages/taro-transformer-wx/src/render.ts
index d80f05a0a35e..9ad1c00816c1 100644
--- a/packages/taro-transformer-wx/src/render.ts
+++ b/packages/taro-transformer-wx/src/render.ts
@@ -1125,6 +1125,7 @@ export class RenderParser {
     this.handleLoopComponents()
     renderBody.traverse(this.visitors)
     this.setOutputTemplate()
+    this.checkDuplicateName()
     this.removeJSXStatement()
     this.setUsedState()
     this.setPendingState()
@@ -1567,6 +1568,17 @@ export class RenderParser {
     )))
   }
 
+  checkDuplicateName () {
+    this.loopScopes.forEach(s => {
+      if (this.renderPath.scope.hasBinding(s)) {
+        const err = codeFrameError(this.renderPath.scope.getBinding(s)!.path.node, '此变量声明与循环变量冲突，可能会造成问题。')
+        // tslint:disable-next-line
+        console.warn('Warning: ', err.message)
+        this.loopScopes.delete(s)
+      }
+    })
+  }
+
   setPendingState () {
     const propertyKeys = Array.from(
         new Set(Array.from(this.referencedIdentifiers)