TypeError：无法读取undefined - source-node.js的属性'substr' [英] TypeError: Cannot read property 'substr' of undefined - source-node.js
问题描述
此错误是因为解决了此问题 <这是我的离子信息：
Cordova CLI：6.5.0
Ionic Framework版本：2.0.0
Ionic CLI版本：2.2.1
Ionic App Lib版本：2.2.0
Ionic App Scripts版本：1.0.0
ios-deploy版本：未安装
ios-sim版本：未安装
操作系统：Windows 10
节点版本：v7.4.0
Xcode版本：未安装
（我也在使用npm v4.1.1 ）
尝试构建 @ ionic / app-scripts ，我收到以下错误：
E：\Documents\Year_3 \ Mobile_Application_Development \ mammoth-v2 \\\
ode_modules\webpack-sources \\\
ode_modules\source-map \lib \ sources-node.js：95
var code = nextLine.substr（0，mappin g.generatedColumn -
^
TypeError：无法在函数中读取未定义
的属性'substr'。< anonymous> （E：\Documents\Year_3 \Mobile_Application_Development\mammoth-v2 \\\
ode_modules\webpack-sources \\\
ode_modules\source-map \lib \ sources-node.js：95：30）$ b在BasicSourceMapConsumer.SourceMapConsumer_eachMapping [as eachMapping]的Array.forEach（native）
$ b（E：\Documents\Year_3 \Mobile_Application_Development\mammoth-v2 \ node_modules \webpack-sources \\\
ode_modules \\ \\ source-map \lib \ source-map-consumer.js：155：14）
at Function.SourceNode_fromStringWithSourceMap [from fromStringWithSourceMap]（E：\Documents\Year_3 \Mobile_Application_Development\mammoth-v2 \ nnode_modules \webpack-sources \\\
ode_modules\source-map \lib \ source-node.js：80：24）
在SourceMapSource.node（E：\Documents \Year_3 \ Mobile_Application_Development\mammoth-v2 \\\
ode_modules\webpack-sources \lib \ SourceMapSource.js：42：20）Replac的
eSource.node（E：\Documents\Year_3 \Mobile_Application_Development\mammoth-v2 \\\
ode_modules\webpack-sources \lib \ReplaceSource.js：69：29）
at CachedSource.node（ E：\Documents\Year_3\Mobile_Application_Development\mammoth-v2 \\\
ode_modules\webpack-sources \lib \CachedSource.js：12：23）
at E：\Documents\Year_3 \ Mobile_Application_Development\mammoth-v2 \\\
ode_modules\webpack-sources \lib \ConcatSource.js：40：49
at Array.map（native）
at ConcatSource.node（E： \Documents\Year_3\Mobile_Application_Development\mammoth-v2 \\\
ode_modules\webpack-sources \lib \ ConcecatSource.js：39：60）
如果需要，当我运行 npm run build （构建 @ionic / app-scripts ），这是构建日志：
[07： 28:45] ionic-app-scripts 1.0.0
[07:28:45] build dev开始...
[07:28:45]干净的开始...
[07:28:45]干净完成4毫秒
[07:28:45]复制开始。 ..
[07:28:45]开始转换...
[07:28:49] transile在4.44 s完成
[07:28:49] webpack开始......
[07:28:49]复制完成4.57 s
**这里出现错误**
编辑：
我添加了配置：
config：{
ionic_generate_source_map：false
}，
...到 packages.json 这似乎解决了错误，但我现在面临另一个错误：
错误：ENOENT：没有这样的文件或目录，打开'main.js.map'
当我尝试做 ionic serve 时引发的构建 @ ionic / app-scripts 现在工作正常）
编辑＃ 2：
ionic 是否依赖源地图来运行？由于错误的产生，因为非构建
此错误来自于在一个ts文件中有两个2个类/组件。
解决此问题的一种野蛮方式。
将转至node_modules \webpack-sources \\\
ode_modules \ source-map \lib \ source-map \ source-node.js
并且交换所有2次出现：
var nextLine = remainingLines [0];
到此
var nextLine = remainingLines [0] || ;
此解决方案的问题在于您无法将其置于版本控制中，因为这是节点模块
This error comes as a result of resolving this question
Here is my ionic info:
Cordova CLI: 6.5.0
Ionic Framework Version: 2.0.0
Ionic CLI Version: 2.2.1
Ionic App Lib Version: 2.2.0
Ionic App Scripts Version: 1.0.0
ios-deploy version: Not installed
ios-sim version: Not installed
OS: Windows 10
Node Version: v7.4.0
Xcode version: Not installed
(I am also using npm v4.1.1)
When attempting to build @ionic/app-scripts, I am getting the following error:
E:\Documents\Year_3\Mobile_Application_Development\mammoth-v2\node_modules\webpack-sources\node_modules\source-map\lib\source-node.js:95
var code = nextLine.substr(0, mapping.generatedColumn -
^
TypeError: Cannot read property 'substr' of undefined
at Function.<anonymous> (E:\Documents\Year_3\Mobile_Application_Development\mammoth-v2\node_modules\webpack-sources\node_modules\source-map\lib\source-node.js:95:30)
at Array.forEach (native)
at BasicSourceMapConsumer.SourceMapConsumer_eachMapping [as eachMapping] (E:\Documents\Year_3\Mobile_Application_Development\mammoth-v2\node_modules\webpack-sources\node_modules\source-map\lib\source-map-consumer.js:155:14)
at Function.SourceNode_fromStringWithSourceMap [as fromStringWithSourceMap] (E:\Documents\Year_3\Mobile_Application_Development\mammoth-v2\node_modules\webpack-sources\node_modules\source-map\lib\source-node.js:80:24)
at SourceMapSource.node (E:\Documents\Year_3\Mobile_Application_Development\mammoth-v2\node_modules\webpack-sources\lib\SourceMapSource.js:42:20)
at ReplaceSource.node (E:\Documents\Year_3\Mobile_Application_Development\mammoth-v2\node_modules\webpack-sources\lib\ReplaceSource.js:69:29)
at CachedSource.node (E:\Documents\Year_3\Mobile_Application_Development\mammoth-v2\node_modules\webpack-sources\lib\CachedSource.js:12:23)
at E:\Documents\Year_3\Mobile_Application_Development\mammoth-v2\node_modules\webpack-sources\lib\ConcatSource.js:40:49
at Array.map (native)
at ConcatSource.node (E:\Documents\Year_3\Mobile_Application_Development\mammoth-v2\node_modules\webpack-sources\lib\ConcatSource.js:39:60)
If needed, when I run npm run build (to build @ionic/app-scripts), this is the build log:
[07:28:45] ionic-app-scripts 1.0.0
[07:28:45] build dev started ...
[07:28:45] clean started ...
[07:28:45] clean finished in 4 ms
[07:28:45] copy started ...
[07:28:45] transpile started ...
[07:28:49] transpile finished in 4.44 s
[07:28:49] webpack started ...
[07:28:49] copy finished in 4.57 s
**errors arise here**
EDIT:
I added the configuration:
"config": {
"ionic_generate_source_map": false
},
...to packages.json which seemed to fix the error but am now faced with another one:
Error: ENOENT: no such file or directory, open 'main.js.map'
Which is thrown when I attempt to do ionic serve (the build of @ionic/app-scripts works just fine now)
EDIT #2:
Does ionic rely on a source map to run? As the error is arising because non are built
This error comes from having two 2 classes/components in one ts file.
A brutal way to fix this.
Is going to node_modules\webpack-sources\node_modules\source-map\lib\source-map\source-node.js
And exchanging all 2 times this appears:
var nextLine = remainingLines[0];
To this
var nextLine = remainingLines[0] || '';
Problem with this solution is that you can't put it into version control since this is node modules
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