bug: project builds failing after upgrading to 4.20.0

[cyfrost]

Prerequisites

• I have read the Contributing Guidelines.
• I agree to follow the Code of Conduct.
• I have searched for existing issues that already report this problem, without success.

Stencil Version

4.20.0

Current Behavior

Hello,

I've recently upgraded a stencil project from v4.19.2 to v4.20.0 after which the builds have started failing.

Here is the build command I've been using always: stencil build --ci --prod --config=stencil-prod.config.ts

The error reads TypeError: Cannot read properties of undefined (reading 'kind') at Object.isClassDeclaration, I think node.parent is undefined while parsing componentMembers. please refer to the screecap below:

I believe this failure can be attributed to TypeScript upgrade from 5.4.5 to 5.5 (#5898), having checked the compiler's stencil.js file by comparing them between the upgrades:

stencil.js (v4.19.2)

stencil.js (v4.20.0)

Expected Behavior

Project build should complete successfully

System Info

System: node 20.16.0
    Platform: darwin (23.6.0)
   CPU Model: Apple M1 (8 cpus)
    Compiler: /node_modules/@stencil/core/compiler/stencil.js
       Build: 1722623140
     Stencil: 4.20.0 🚐
  TypeScript: 5.5.3
      Rollup: 2.56.3
      Parse5: 7.1.2
      jQuery: 4.0.0-pre
      Terser: 5.31.1

Steps to Reproduce

This may not be reproducible in a new stencil starter app. However, I'm hoping to understand why this has occurred and if there's a workaround or known solution

Code Reproduction URL

null

Additional Information

No response

[cyfrost]

Just identified the culprit to be a getter called shadowRoot in one of the components which is now explicitly disallowed after #5912

I was able to rename the getter and the builds have since been successful.

Here is how the getter looks now:

  private get currentShadowRootRef(): ShadowRoot {
    return this.el.shadowRoot;
  }

Closing this, please feel free to reopen if there's any suggestion.

[christian-bromann]

A fix for this bug has been published in Stencil v4.21.0!