Closed
Description
🐞 bug report
Affected Package
@angular/compiler
Is this a regression?
Yes, we're migrating from 7.1.x, in 7's version no error in aot mode
Description
if we accidentally duplicate let expression in template we'll get an error
<ng-template #tmps let-obj let-obj="obj">
{{obj | json}}
</ng-template>
<ng-container
[ngTemplateOutlet]="tmps"
[ngTemplateOutletContext]="{$implicit: {a: 2}"
</ng-container>
this is correct behavior, but during migration it's quite hard to investigate where actually error is.
Cause of error message The name <name> is already defined in scope to be [object Object]
due to [object Object] it's not understandable
Minimal Reproduction
https://github.com/djleonskennedy/ng9-repro
npm inpm run build --prod
NOTE - issue cannot be reproduced in stackblitz
🔥 Exception or Error
ERROR in Error: Internal Error: The name obj is already defined in scope to be [object Object]
at error (/home/project/src/santander/misc/example/node_modules/@angular/compiler/bundles/compiler.umd.js:2721:15)
at BindingScope.set (/home/project/src/santander/misc/example/node_modules/@angular/compiler/bundles/compiler.umd.js:18154:17)
at TemplateDefinitionBuilder.registerContextVariables (/home/project/src/santander/misc/example/node_modules/@angular/compiler/bundles/compiler.umd.js:17051:32)
at /home/project/src/santander/misc/example/node_modules/@angular/compiler/bundles/compiler.umd.js:16967:59
at Array.forEach ()
at TemplateDefinitionBuilder.buildTemplateFunction (/home/project/src/santander/misc/example/node_modules/@angular/compiler/bundles/compiler.umd.js:16967:23)
at /home/project/src/santander/misc/example/node_modules/@angular/compiler/bundles/compiler.umd.js:17558:60
at /home/project/src/santander/misc/example/node_modules/@angular/compiler/bundles/compiler.umd.js:16992:81
at Array.forEach ()
at TemplateDefinitionBuilder.buildTemplateFunction (/home/project/src/santander/misc/example/node_modules/@angular/compiler/bundles/compiler.umd.js:16992:37)
at Object.compileComponentFromMetadata (/home/project/src/santander/misc/example/node_modules/@angular/compiler/bundles/compiler.umd.js:18643:58)
at ComponentDecoratorHandler.compile (/home/project/src/santander/misc/example/node_modules/@angular/compiler-cli/src/ngtsc/annotations/src/component.js:534:34)
at _loop_2 (/home/project/src/santander/misc/example/node_modules/@angular/compiler-cli/src/ngtsc/transform/src/compilation.js:542:53)
at TraitCompiler.compile (/home/project/src/santander/misc/example/node_modules/@angular/compiler-cli/src/ngtsc/transform/src/compilation.js:572:21)
at IvyVisitor.visitClassDeclaration (/home/project/src/santander/misc/example/node_modules/@angular/compiler-cli/src/ngtsc/transform/src/transform.js:51:40)
at /home/project/src/santander/misc/example/node_modules/@angular/compiler-cli/src/ngtsc/util/src/visitor.js:77:93
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] build: `ng build`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! /home/yuriy_yakovenko/.npm/_logs/2020-02-12T10_41_09_828Z-debug.log
🌍 Your Environment
Angular Version:
Angular CLI: 9.0.1
Node: 12.13.1
OS: linux x64
Angular: 9.0.0
... animations, cdk, common, compiler, compiler-cli, core, forms
... language-service, material, platform-browser
... platform-browser-dynamic, router
Ivy Workspace: Yes
Package Version
-----------------------------------------------------------
@angular-devkit/architect 0.900.1
@angular-devkit/build-angular 0.900.1
@angular-devkit/build-optimizer 0.900.1
@angular-devkit/build-webpack 0.900.1
@angular-devkit/core 9.0.1
@angular-devkit/schematics 9.0.1
@angular/cli 9.0.1
@ngtools/webpack 9.0.1
@schematics/angular 9.0.1
@schematics/update 0.900.1
rxjs 6.5.4
typescript 3.7.5
webpack 4.41.2
Anything else relevant?
Could be related: angular/angular-cli#14663
Regards Yuriy!