1.执行gulp build-css报错css
[09:40:49] Starting 'build-css'... Building CSS Potentially unhandled rejection [2] TypeError: Cannot call method 'match' of und efined at DestroyableTransform.module.exports.settings.plumber.less.errorHandler (E :\devtools\nodejs4\node_modules\semantic-ui\tasks\config\tasks.js:92:29)
2.找到\devtools\nodejs4\node_modules\semantic-ui\tasks\config\tasks.js:92行代码为node
if(error.filename.match(/theme.less/)) {
从错误提示能够看出error.filename没有match方法,修改代码将error打印出来,gulp
console.error(error); console.error(error.filename);
[09:40:49] Starting 'build-css'... Building CSS [Error: no writecb in Transform class] undefined Potentially unhandled rejection [2] TypeError: Cannot call method 'match' of und efined at DestroyableTransform.module.exports.settings.plumber.less.errorHandler (E :\devtools\nodejs4\node_modules\semantic-ui\tasks\config\tasks.js:94:29)
从输出日志能够看出error.filename为underfined,而no writecb in Transform class。。。less
进一步得知no writecb...错误是nodejs抛出的错误。ui
事实证实是bug, Installing gulp-autoprefixer@2.3.1 fixed it。日志