From c82a5dac4900743d5050a39d5e6cf3ff08488ddf Mon Sep 17 00:00:00 2001
From: sunlei <sunlei33@outlook.com>
Date: Thu, 9 Mar 2017 12:48:04 +0800
Subject: [PATCH 1/3] when vue and vue-template-compiler version mismatch, it
 should fail loader and webpack

---
 lib/template-compiler.js | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lib/template-compiler.js b/lib/template-compiler.js
index b9d0d92e3..8da3e492e 100644
--- a/lib/template-compiler.js
+++ b/lib/template-compiler.js
@@ -58,6 +58,13 @@ module.exports = function (html) {
       options.transformToRequire
     )
   }
+  
+  var compilerVersion = require('vue-template-compiler/package.json').version
+  var vueVersion = require('vue').version
+
+  if(vueVersion !== compilerVersion){
+    this.emitError(`vue version ${vueVersion} mismatch vue-template-compiler version ${compilerVersion}`)
+  }
 
   var compiled = compiler.compile(html, Object.assign({
     preserveWhitespace: options.preserveWhitespace

From 7abcea69405a41a044ed0ff2c2464568f2848e03 Mon Sep 17 00:00:00 2001
From: sunlei <sunlei33@outlook.com>
Date: Thu, 9 Mar 2017 13:08:05 +0800
Subject: [PATCH 2/3] fix code style

---
 lib/template-compiler.js | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/lib/template-compiler.js b/lib/template-compiler.js
index 8da3e492e..6b1654203 100644
--- a/lib/template-compiler.js
+++ b/lib/template-compiler.js
@@ -58,11 +58,10 @@ module.exports = function (html) {
       options.transformToRequire
     )
   }
-  
   var compilerVersion = require('vue-template-compiler/package.json').version
   var vueVersion = require('vue').version
 
-  if(vueVersion !== compilerVersion){
+  if (vueVersion !== compilerVersion) {
     this.emitError(`vue version ${vueVersion} mismatch vue-template-compiler version ${compilerVersion}`)
   }
 

From 8a90e27905eec7a01ef4e2505e3e07d73cbf9368 Mon Sep 17 00:00:00 2001
From: sunlei <sunlei33@outlook.com>
Date: Fri, 10 Mar 2017 12:15:48 +0800
Subject: [PATCH 3/3] use friendly error message fetch version from
 package.json to avoid evaluating Vue

---
 lib/template-compiler.js | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/lib/template-compiler.js b/lib/template-compiler.js
index 6b1654203..cd269ba91 100644
--- a/lib/template-compiler.js
+++ b/lib/template-compiler.js
@@ -58,11 +58,19 @@ module.exports = function (html) {
       options.transformToRequire
     )
   }
-  var compilerVersion = require('vue-template-compiler/package.json').version
-  var vueVersion = require('vue').version
 
-  if (vueVersion !== compilerVersion) {
-    this.emitError(`vue version ${vueVersion} mismatch vue-template-compiler version ${compilerVersion}`)
+  // when vue and vue-template-compiler mismatch version, then fail the vue-loader
+  var vueTemplateCompiler = require('vue-template-compiler/package.json')
+  var vueVersion = require('vue/package.json').version
+  if (vueVersion !== vueTemplateCompiler.version) {
+    this.emitError(`\n
+        Vue packages version mismatch:
+        -vue@${vueVersion}
+        -${vueTemplateCompiler.name}@${vueTemplateCompiler.version}
+        This may cause things to work incorrectly. Make sure to use the same version for both.
+        If you are using vue-loader@>=10.0, simply update ${vueTemplateCompiler.name}.
+        If you are using vue-loader@<10.0 or vueify, re-installing vue-loader/vueify should bump ${vueTemplateCompiler.version} to the latest.\n
+    `)
   }
 
   var compiled = compiler.compile(html, Object.assign({