Run-time error in @vue/compiler-core - all versions after 3.4.25

[tmcdos]

Vue version

3.4.30

Link to minimal reproduction

https://stackblitz.com/edit/tmcdos-compiler-core?file=package.json

Steps to reproduce

1. Execute npm i
2. Execute npm run serve or npm run build

What is expected?

Application should start without run-time errors in any of the packages inside node_modules

What is actually happening?

There is a run-time error in @vue/compiler-core - all versions after 3.4.25 (3.4.26/27/28/29/30)
The error occurs on line 314 in file packages/compiler-core/src/transforms/transformExpression.ts
https://github.com/vuejs/core/blob/v3.4.26/packages/compiler-core/src/transforms/transformExpression.ts#L314
because parent is undefined.

 App •  ERROR  •  UI  in ./src/views/FrontVariable.vue?vue&type=template&id=13f3b97b

Syntax Error: processExpression/<@/home/projects/tmcdos-compiler-core/node_modules/@vue/compiler-core/dist/compiler-core.cjs.js:4350:13
enter@/home/projects/tmcdos-compiler-core/node_modules/@vue/compiler-core/dist/compiler-core.cjs.js:1518:23
visit@/home/projects/tmcdos-compiler-core/node_modules/estree-walker/dist/umd/estree-walker.js:116:17
walk@/home/projects/tmcdos-compiler-core/node_modules/estree-walker/dist/umd/estree-walker.js:322:19
walkIdentifiers@/home/projects/tmcdos-compiler-core/node_modules/@vue/compiler-core/dist/compiler-core.cjs.js:1508:16
processExpression@/home/projects/tmcdos-compiler-core/node_modules/@vue/compiler-core/dist/compiler-core.cjs.js:4333:18
transformExpression@/home/projects/tmcdos-compiler-core/node_modules/@vue/compiler-core/dist/compiler-core.cjs.js:4208:21
traverseNode@/home/projects/tmcdos-compiler-core/node_modules/@vue/compiler-core/dist/compiler-core.cjs.js:3355:38
traverseChildren@/home/projects/tmcdos-compiler-core/node_modules/@vue/compiler-core/dist/compiler-core.cjs.js:3347:17
traverseNode@/home/projects/tmcdos-compiler-core/node_modules/@vue/compiler-core/dist/compiler-core.cjs.js:3389:23
processIf@/home/projects/tmcdos-compiler-core/node_modules/@vue/compiler-core/dist/compiler-core.cjs.js:4519:21
transformIf<@/home/projects/tmcdos-compiler-core/node_modules/@vue/compiler-core/dist/compiler-core.cjs.js:4424:12
createStructuralDirectiveTransform/<@/home/projects/tmcdos-compiler-core/node_modules/@vue/compiler-core/dist/compiler-core.cjs.js:3412:28
traverseNode@/home/projects/tmcdos-compiler-core/node_modules/@vue/compiler-core/dist/compiler-core.cjs.js:3355:38
traverseChildren@/home/projects/tmcdos-compiler-core/node_modules/@vue/compiler-core/dist/compiler-core.cjs.js:3347:17
traverseNode@/home/projects/tmcdos-compiler-core/node_modules/@vue/compiler-core/dist/compiler-core.cjs.js:3389:23
transform@/home/projects/tmcdos-compiler-core/node_modules/@vue/compiler-core/dist/compiler-core.cjs.js:3281:15
baseCompile@/home/projects/tmcdos-compiler-core/node_modules/@vue/compiler-core/dist/compiler-core.cjs.js:6447:12
compile@/home/projects/tmcdos-compiler-core/node_modules/@vue/compiler-dom/dist/compiler-dom.cjs.js:685:23
doCompileTemplate@/home/projects/tmcdos-compiler-core/node_modules/@vue/compiler-sfc/dist/compiler-sfc.cjs.js:4286:47
compileTemplate@/home/projects/tmcdos-compiler-core/node_modules/@vue/compiler-sfc/dist/compiler-sfc.cjs.js:4228:12
TemplateLoader@/home/projects/tmcdos-compiler-core/node_modules/vue-loader/dist/templateLoader.js:53:37

System Info

System:
    OS: Linux 5.0 undefined
    CPU: (8) x64 Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
    Memory: 0 Bytes / 0 Bytes
    Shell: 1.0 - /bin/jsh
  Binaries:
    Node: 18.20.3 - /usr/local/bin/node
    Yarn: 1.22.19 - /usr/local/bin/yarn
    npm: 10.2.3 - /usr/local/bin/npm
    pnpm: 8.15.6 - /usr/local/bin/pnpm
  npmPackages:
    vue: ^3.4.30 => 3.4.30

Any additional comments?

The error does not occur on old versions of @vue/compiler-core - e.g. 3.4.25 and below.
It occurs on recent versions - 3.4.26 and above, up to the latest.
My current workaround is to patch the package and add a check for non-NULL parent on the above line
https://github.com/vuejs/core/blob/v3.4.26/packages/compiler-core/src/transforms/transformExpression.ts#L314

[jh-leong]

duplicate of #11216

[tmcdos]

@jh-leong Sorry, did not notice it is the same error. You can safely close this ticket since you already made a fix.