将Angular 7更新为Angular 9之后，无法读取null的属性'fileName'中的错误

Question

将角度7更新为9后，我在无法读取null属性'fileName'中收到错误消息。我已将所有依赖项更新为最新版本。

package.json] >>

{
    "name": "project name",
    "version": "0.0.0",
    "license": "MIT",
    "scripts": {
        "ng": "ng",
        "start": "ng serve",
        "build": "ng build",
        "test": "ng test",
        "lint": "ng lint",
        "e2e": "ng e2e"
    },
    "private": true,
    "dependencies": {
        "@angular/animations": "9.0.6",
        "@angular/cdk": "^9.1.3",
        "@angular/cli": "9.0.6",
        "@angular/common": "9.0.6",
        "@angular/compiler": "9.0.6",
        "@angular/core": "9.0.6",
        "@angular/forms": "9.0.6",
        "@angular/http": "7.2.16",
        "@angular/platform-browser": "9.0.6",
        "@angular/platform-browser-dynamic": "9.0.6",
        "@angular/router": "9.0.6",
        "@ngui/datetime-picker": "^0.16.2",
        "angular-flash-message": "^3.4.0",
        "angular2-clipboard": "^2.0.14",
        "angular2-color-picker": "^1.3.1",
        "angular2-cookie": "^1.2.6",
        "angular2-flash-messages": "^3.0.1",
        "angular2-modal": "^3.0.3",
        "angular2-multiselect-dropdown": "^4.6.3",
        "chart.js": "^2.9.3",
        "chart.piecelabel.js": "^0.15.0",
        "chartjs-plugin-datalabels": "^0.7.0",
        "chartjs-plugin-labels": "^1.1.0",
        "core-js": "^3.6.4",
        "file-saver": "^2.0.2",
        "file-saver-typescript": "^1.0.1",
        "jasmine-core": "^3.5.0",
        "jasmine-spec-reporter": "^4.2.1",
        "jspdf": "^1.5.3",
        "jspdf-autotable": "^3.2.13",
        "moment-timezone": "^0.5.28",
        "ng-circle-progress": "^1.5.1",
        "ng-click-outside": "^6.0.0",
        "ng-diff-match-patch": "^3.0.1",
        "ng-pick-datetime": "^7.0.0",
        "ng-pick-datetime-moment": "1.0.8",
        "ng2-charts": "^2.3.0",
        "ng2-ckeditor": "^1.2.7",
        "ng2-completer": "^3.0.3",
        "ng2-dnd": "^5.0.2",
        "ng2-pdf-viewer": "^6.1.2",
        "ng5-breadcrumb": "^0.0.6",
        "ngx-bootstrap": "5.5.0",
        "ngx-bootstrap-modal": "^2.0.1",
        "ngx-chips": "^2.1.0",
        "ngx-clipboard": "^13.0.0",
        "ngx-color-picker": "^9.0.0",
        "ngx-pagination": "^5.0.0",
        "ngx-popover": "0.0.16",
        "ngx-progressbar": "^6.0.2",
        "ngx-toastr": "^12.0.0",
        "pluralize": "^8.0.0",
        "rxjs": "^6.5.4",
        "rxjs-compat": "^6.5.4",
        "tslib": "^1.11.1",
        "web-animations-js": "2.3.2",
        "xlsx": "^0.15.6",
        "zone.js": "^0.10.3"
    },
    "devDependencies": {
        "@angular-devkit/build-angular": "^0.900.6",
        "@angular/compiler-cli": "9.0.6",
        "@angular/language-service": "9.0.6",
        "@types/jasmine": "3.5.9",
        "@types/node": "^13.9.1",
        "codelyzer": "~5.2.1",
        "jasmine-spec-reporter": "^4.1.1",
        "karma": "^4.4.1",
        "karma-chrome-launcher": "~3.1.0",
        "karma-cli": "~2.0.0",
        "karma-coverage-istanbul-reporter": "^2.1.1",
        "karma-jasmine": "~3.1.1",
        "karma-jasmine-html-reporter": "^1.5.2",
        "protractor": "^5.4.3",
        "ts-node": "~8.6.2",
        "tslint": "~6.1.0",
        "typescript": "3.8.3"
    } }
[当我尝试提供服务时，构建应用程序，它会收到相同的错误。是否有可能跟踪此错误的位置？它与我目前使用的任何依赖项有关吗？可以帮我解决这个问题。

将角度7更新为9后，我在无法读取null属性'fileName'中收到错误消息。我已将所有依赖项更新为最新版本。 package.json {“名称”：“项目名称” ...

Answer 1

执行一些调试后，我找到了一种针对我的情况生成堆栈跟踪的方法。这是我采取的步骤：