uniapp编译报错Module build failed (from ./node_modules/@dcloudio/webpack-uni-mp-loader/lib/script.js):

uniapp编译报错 Module build failed (from ./node_modules/@dcloudio/webpack-uni-mp-loader/lib/script.js):
查了查，说问题在于#ifdef，#ifndef，#endif 于是把所有的都去掉了，但编译还是报这个错误，头疼。

我的工具版本是2.4.5.20191209

20:06:19.324 正在编译中...
20:06:40.086 Module build failed (from ./node_modules/@dcloudio/webpack-uni-mp-loader/lib/script.js):
20:06:40.092 SyntaxError: Unexpected identifier
20:06:40.100 at new Function (<anonymous>)
20:06:40.104 at getTestTemplate (D:\MyPrograms\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\vue-cli-plugin-uni\packages\webpack-preprocess-loader\preprocess\lib\preprocess.js:375:10)
20:06:40.109 at testPasses (D:\MyPrograms\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\vue-cli-plugin-uni\packages\webpack-preprocess-loader\preprocess\lib\preprocess.js:379:16)
20:06:40.115 at D:\MyPrograms\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\vue-cli-plugin-uni\packages\webpack-preprocess-loader\preprocess\lib\preprocess.js:176:19
20:06:40.120 at D:\MyPrograms\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\vue-cli-plugin-uni\packages\webpack-preprocess-loader\preprocess\lib\preprocess.js:326:22
20:06:40.125 at Array.reduce (<anonymous>)
20:06:40.130 at matchReplacePass (D:\MyPrograms\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\vue-cli-plugin-uni\packages\webpack-preprocess-loader\preprocess\lib\preprocess.js:313:20)
20:06:40.134 at replaceRecursive (D:\MyPrograms\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\vue-cli-plugin-uni\packages\webpack-preprocess-loader\preprocess\lib\preprocess.js:333:10)
20:06:40.139 at preprocessor (D:\MyPrograms\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\vue-cli-plugin-uni\packages\webpack-preprocess-loader\preprocess\lib\preprocess.js:168:10)
20:06:40.144 at Object.preprocess (D:\MyPrograms\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\vue-cli-plugin-uni\packages\webpack-preprocess-loader\preprocess\lib\preprocess.js:93:10)
20:06:40.149 at Object.module.exports (D:\MyPrograms\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\webpack-uni-mp-loader\lib\script-new.js:34:26)
20:06:40.154 at Object.module.exports (D:\MyPrograms\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\webpack-uni-mp-loader\lib\script.js:22:36)
20:06:40.158 ERROR Build failed with errors.