`TypeError: Cannot read properties of undefined (reading 'length')` when using tree-sitter-elm with tree-sitter 0.21

[ymtszw]

Problem

As per tree-sitter's official usage, we should be able to initialize tree-sitter Parser with Elm language:

const Parser = require('tree-sitter');
const Elm = require('tree-sitter-elm');

const parser = new Parser();
parser.setLanguage(Elm);

However, with tree-sitter-elm 5.8.0 (which declares peerDependencies for tree-sitter ^0.21.1), the above code crashes:

/Users/yumatsuzawa/workspace/setem/node_modules/tree-sitter/index.js:837
  for (let id = 0, n = nodeTypeNamesById.length; id < n; id++) {
                                         ^

TypeError: Cannot read properties of undefined (reading 'length')
    at initializeLanguageNodeClasses (/Users/yumatsuzawa/workspace/setem/node_modules/tree-sitter/index.js:837:42)
    at Parser.setLanguage (/Users/yumatsuzawa/workspace/setem/node_modules/tree-sitter/index.js:342:5)
    at Object.<anonymous> (/Users/yumatsuzawa/workspace/setem/src/index.js:41:8)
    at Module._compile (node:internal/modules/cjs/loader:1554:14)
    at Object..js (node:internal/modules/cjs/loader:1706:10)
    at Module.load (node:internal/modules/cjs/loader:1289:32)
    at Function._load (node:internal/modules/cjs/loader:1108:12)
    at TracingChannel.traceSync (node:diagnostics_channel:322:14)
    at wrapModuleLoad (node:internal/modules/cjs/loader:220:24)
    at Module.require (node:internal/modules/cjs/loader:1311:12)

The probem was found on rountine package upgrade of my setem tool, which uses tree-sitter-elm (BTW, thanks a lot for this!)

https://github.com/ymtszw/setem/blob/master/src/index.js#L40-L41

The code was working fine with tree-sitter-elm 5.7.0 and tree-sitter 0.20.6

Environment

• tree-sitter-elm 5.8.0
• tree-sitter 0.21.1
• Node.js 22.14.0
• npm 11.2.0

Remarks

I wish I could have looked into it deeper myself, but I'm not familiar with the anatomy of tree-sitter, so it was tough. Let me know if there's any information you need from me!

[razzeee]

The api changed pretty significantly, from what I can tell - so you will probably have to change that source path and probably more.

[ymtszw]

Is there anything I can do from users' side? For now I'm locking the dep range as <5.8.0

Does node/binding_test passes on this repo?

[tsukimizake]

I noticed tree-sitter-elm uses tree-sitter-cli 0.25.3 to generate the parser so I tried to set tree-sitter: "^0.25" on my user project and npm install --force, and it worked well. I think it's misleading that tree-sitter-elm specifies the tree-sitter: "^0.21.1" as a peerDependency.