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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Angular 21  `assertion error injectorIndex should point to a bloom filter` when using interpolation bindings on Kendo Angular Grid inputs","articleBody":"### Which @angular/* package(s) are the source of the bug?\n\ncore\n\n### Is this a regression?\n\nYes\n\n### Description\n\nAfter an upgrade to Angular 21, template syntax that worked in earlier versions now triggers an ASSERTION ERROR: LContainer must be defined.\n\nThe issue appears when interpolation syntax is used on component input bindings in the Kendo Angular Grid.\n\nExample that previously worked in Angular 20:\n\n```html\n\u003ckendo-grid [kendoGridBinding]=\"data\"\u003e\n  \u003ckendo-grid-column field=\"{{ 'date' }}\" title=\"{{ 'Date' }}\"\u003e\u003c/kendo-grid-column\u003e\n\u003c/kendo-grid\u003e\n```\nThe above will not work in Angular 21 unless optimization is set to true.\n\nThis will also work in Angular 21, but if you add a second Grid it will throw the error:\n\n```html\n      \u003ckendo-grid [kendoGridBinding]=\"data\"\u003e\n        \u003ckendo-grid-column title=\"{{ 'bar' }}\" field=\"{{ 'name' }}\"\u003e\u003c/kendo-grid-column\u003e\n      \u003c/kendo-grid\u003e\n```\n\nIf[ build optimization](https://angular.dev/reference/configs/workspace-config#optimization-configuration) is enabled in the `angular.json`, the error will not be thrown.\n\nExample where the error is reproduced and additional information in comment form:\n[grid-angular21.zip](https://github.com/user-attachments/files/24193447/grid-angular21.zip)\n\n\n### Please provide the exception or error you saw\n\n```true\nERROR Error: ASSERTION ERROR: injectorIndex should point to a bloom filter [Expected=\u003e number === string \u003c=Actual]\n    at throwError2 (_untracked-chunk.mjs:225:9)\n    at assertNumber (_untracked-chunk.mjs:156:5)\n    at assertNodeInjector (_untracked-chunk.mjs:1616:3)\n    at lookupTokenUsingNodeInjector (_debug_node-chunk.mjs:926:20)\n    at getOrCreateInjectable (_debug_node-chunk.mjs:878:19)\n    at ɵɵdirectiveInject (_debug_node-chunk.mjs:7456:17)\n    at NodeInjectorFactory.ListComponent_Factory [as factory] (progress-kendo-angular-grid.mjs:35536:102)\n    at getNodeInjectable (_debug_node-chunk.mjs:1013:38)\n    at instantiateAllDirectives (_debug_node-chunk.mjs:4923:23)\n    at createDirectivesInstances (_debug_node-chunk.mjs:4782:3)\n\n\n\u003cimg width=\"960\" height=\"177\" alt=\"Image\" src=\"https://github.com/user-attachments/assets/4b681abf-934f-461b-a634-b89d273c6913\" /\u003e\n```\n\n### Please provide the environment you discovered this bug in (run `ng version`)\n\n```true\nAngular CLI       : 21.0.0\nAngular           : 21.0.0\nNode.js           : 22.12.0\nPackage Manager   : npm 11.1.0\nOperating System  : darwin arm64\n\n┌───────────────────────────┬───────────────────┬───────────────────┐\n│ Package                   │ Installed Version │ Requested Version │\n├───────────────────────────┼───────────────────┼───────────────────┤\n│ @angular/build            │ 21.0.0            │ ^21.0.0           │\n│ @angular/cli              │ 21.0.0            │ ^21.0.0           │\n│ @angular/common           │ 21.0.0            │ ^21.0.0           │\n│ @angular/compiler         │ 21.0.0            │ ^21.0.0           │\n│ @angular/compiler-cli     │ 21.0.0            │ ^21.0.0           │\n│ @angular/core             │ 21.0.0            │ ^21.0.0           │\n│ @angular/forms            │ 21.0.0            │ ^21.0.0           │\n│ @angular/localize         │ 21.0.0            │ ^21.0.0           │\n│ @angular/platform-browser │ 21.0.0            │ ^21.0.0           │\n│ @angular/router           │ 21.0.0            │ ^21.0.0           │\n│ rxjs                      │ 7.8.2             │ ~7.8.0            │\n│ typescript                │ 5.9.3             │ ~5.9.2            │\n│ vitest                    │ 4.0.14            │ ^4.0.8\n```","author":{"url":"https://github.com/yanmariomenev","@type":"Person","name":"yanmariomenev"},"datePublished":"2025-12-16T14:32:19.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/66101/angular/issues/66101"}