WebAssembly / WebAssembly/spec
gc-exotic-objects `[[PreventExtensions]]` should return `true`.
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- WebAssembly
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Description
GC object are already non-extensible ([[IsExtensible]] returns true). Preventing extensions on a non-extensible object should be an no-op.
By returning false to [[PreventExtensions]], any caller to Object.preventExtensions() would get a thrown TypeError even though the object is already non-extensible, which is surprising (even though it is not technically a violation of the object invariants).
To avoid this surprising behavior, WASM Garbage Collected Objects should return true for [[PreventExtensions]].
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
The issue names no files or tests. Start by locating the WebAssembly GC object specification and implementation entry points for [[PreventExtensions]] and [[IsExtensible]], then inspect existing coverage for Object.preventExtensions(). Done means GC objects return true from [[PreventExtensions]] and the behavior is covered by the relevant test suite.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- wasm
- Domain
- compilers
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100