Typing loss on nested slot definitions

[rMonell]

While trying to update Vue to its latest version (3.5.10 actually), we noticed some rather strange errors.

It seems that declaring a slot in a scoped slot, whose name uses the value exposed by this same slot, causes typing problems.

Example (I've deliberately simplified the components to keep only the source of the bug) :

Example 1	Example 2

However, I noticed that I couldn't reproduce this problem in a similar sandbox (https://codesandbox.io/p/devbox/cvwccj?file=%2Fsrc%2Fcomponents%2FThreeColumnsLayout.vue%3A17%2C1).

Has anyone encountered a similar problem? Or could you clarify whether it's a Vue issue, or another package?

In case it helps, here is a copy of my package.json :

{
  ...
  "dependencies": {
    "@dagrejs/dagre": "^1.1.4",
    "@mdi/font": "7.4.47",
    "@thomaschaplin/isin-generator": "^1.0.3",
    "@tiptap/core": "^2.8.0",
    "@tiptap/extension-bullet-list": "^2.8.0",
    "@tiptap/extension-heading": "^2.8.0",
    "@tiptap/extension-image": "^2.8.0",
    "@tiptap/extension-link": "^2.8.0",
    "@tiptap/extension-ordered-list": "^2.8.0",
    "@tiptap/extension-paragraph": "^2.8.0",
    "@tiptap/extension-placeholder": "^2.8.0",
    "@tiptap/extension-underline": "^2.8.0",
    "@tiptap/pm": "^2.8.0",
    "@tiptap/starter-kit": "^2.8.0",
    "@tiptap/vue-3": "^2.8.0",
    "@types/mime-types": "^2.1.4",
    "@vue-flow/background": "^1.3.0",
    "@vue-flow/core": "^1.41.2",
    "@vuepic/vue-datepicker": "^9.0.3",
    "@vueuse/core": "^11.1.0",
    "@vueuse/router": "^11.1.0",
    "aws-amplify": "^6.6.3",
    "axios": "^1.7.7",
    "color": "^4.2.3",
    "date-fns": "^4.1.0",
    "deepmerge-ts": "^7.1.0",
    "dotenv": "^16.4.5",
    "echarts": "^5.5.1",
    "lodash-es": "^4.17.21",
    "maska": "^3.0.2",
    "mime-types": "^2.1.35",
    "pinia": "^2.2.4",
    "prosemirror-image-plugin": "^2.10.0",
    "remove": "^0.1.5",
    "sanitize-html": "^2.13.0",
    "uuid": "^10.0.0",
    "vee-validate": "^4.13.2",
    "vue": "^3.5.10",
    "vue-echarts": "^7.0.3",
    "vue-i18n": "^9.14.1",
    "vue-router": "^4.4.5",
    "vuedraggable": "^4.1.0",
    "vuetify": "3.6.15",
    "webfontloader": "^1.6.28",
    "yup": "^1.4.0"
  },
  "devDependencies": {
    "@histoire/plugin-vue": "^0.17.17",
    "@ianvs/prettier-plugin-sort-imports": "^4.3.1",
    "@inquirer/confirm": "^4.0.1",
    "@intlify/eslint-plugin-vue-i18n": "3.0.0",
    "@intlify/unplugin-vue-i18n": "^4.0.0",
    "@pinia/testing": "^0.1.6",
    "@playwright/test": "^1.47.2",
    "@rushstack/eslint-patch": "^1.10.4",
    "@tsconfig/node22": "^22.0.0",
    "@types/color": "^3.0.6",
    "@types/echarts": "^4.9.22",
    "@types/inquirer": "^9.0.7",
    "@types/lodash-es": "^4.17.12",
    "@types/node": "^22.7.4",
    "@types/sanitize-html": "^2.13.0",
    "@types/shelljs": "^0.8.15",
    "@types/uuid": "^10.0.0",
    "@types/webfontloader": "^1.6.38",
    "@vitejs/plugin-vue": "^5.1.4",
    "@vitest/coverage-istanbul": "^2.1.1",
    "@vue/eslint-config-prettier": "^9.0.0",
    "@vue/eslint-config-typescript": "^13.0.0",
    "@vue/runtime-core": "^3.5.10",
    "@vue/test-utils": "^2.4.6",
    "@vue/tsconfig": "^0.5.1",
    "axios-mock-adapter": "^2.0.0",
    "chalk": "^5.3.0",
    "commander": "^12.1.0",
    "eslint": "8.57.0",
    "eslint-plugin-import": "^2.30.0",
    "eslint-plugin-vue": "9.28.0",
    "fuse.js": "^7.0.0",
    "histoire": "^0.17.17",
    "husky": "^9.1.6",
    "inquirer": "^11.1.0",
    "lint-staged": "^15.2.10",
    "memfs": "^4.12.0",
    "prettier": "3.3.3",
    "resize-observer-polyfill": "^1.5.1",
    "rollup-plugin-visualizer": "^5.12.0",
    "sass": "^1.79.4",
    "sass-loader": "16.0.2",
    "scroll-polyfill": "^1.0.1",
    "shelljs": "^0.8.5",
    "source-map": "^0.7.4",
    "tsx": "^4.19.1",
    "typescript": "^5.5.4",
    "unplugin-auto-import": "^0.18.3",
    "unplugin-vue-components": "^0.27.4",
    "vite": "^5.4.8",
    "vite-plugin-node-polyfills": "^0.22.0",
    "vite-plugin-vuetify": "^2.0.4",
    "vite-svg-loader": "^5.1.0",
    "vitest": "^2.1.1",
    "vitest-fail-on-console": "^0.7.1",
    "vue-tsc": "^2.1.6"
  },
  ...
}

Thanks in advance !