"Module parse failed: Unexpected character" when running yarn build

[laike9m]

I was following the contributing guide.

After I run yarn, there were some warnings (listed in case it's relevant):

$ yarn                                                                                                                                                              
yarn install v1.22.4
[1/4] 🔍  Resolving packages...
[2/4] 🚚  Fetching packages...
warning [email protected]: The engine "vscode" appears to be invalid.
[3/4] 🔗  Linking dependencies...
warning "workspace-aggregator-a636d9d6-7cfd-4aff-a6f3-febd4ac43bff > @hediet/visualization > [email protected]" has unmet peer dependency "keycharm@^0.2.0".
warning "workspace-aggregator-a636d9d6-7cfd-4aff-a6f3-febd4ac43bff > @hediet/visualization > [email protected]" has unmet peer dependency "moment@^2.24.0".
warning "workspace-aggregator-a636d9d6-7cfd-4aff-a6f3-febd4ac43bff > @hediet/visualization > [email protected]" has unmet peer dependency "uuid@^3.4.0".
warning "workspace-aggregator-a636d9d6-7cfd-4aff-a6f3-febd4ac43bff > @hediet/visualization > [email protected]" has unmet peer dependency "vis-util@^3.0.0".
[4/4] 🔨  Building fresh packages...
✨  Done in 156.06s.

Then I run yarn build, an error showed up

...lines ommited

WARNING in ../node_modules/express/lib/view.js 81:13-25
Critical dependency: the request of a dependency is an expression
 @ ../node_modules/express/lib/application.js
 @ ../node_modules/express/lib/express.js
 @ ../node_modules/express/index.js
 @ ./src/Server.ts
 @ ./src/extension.ts

WARNING in ./node_modules/ws/lib/buffer-util.js
Module not found: Error: Can't resolve 'bufferutil' in '/Users/laike9m/Dev/VSC/vscode-debug-visualizer/extension/node_modules/ws/lib'
 @ ./node_modules/ws/lib/buffer-util.js
 @ ./node_modules/ws/lib/websocket.js
 @ ./node_modules/ws/index.js
 @ ./src/Server.ts
 @ ./src/extension.ts

WARNING in ../node_modules/ws/lib/buffer-util.js
Module not found: Error: Can't resolve 'bufferutil' in '/Users/laike9m/Dev/VSC/vscode-debug-visualizer/node_modules/ws/lib'
 @ ../node_modules/ws/lib/buffer-util.js
 @ ../node_modules/ws/lib/websocket.js
 @ ../node_modules/ws/index.js
 @ ../node_modules/isomorphic-ws/node.js
 @ ../node_modules/@hediet/typed-json-rpc-websocket/dist/index.js
 @ ./src/Server.ts
 @ ./src/extension.ts

WARNING in ./node_modules/ws/lib/validation.js
Module not found: Error: Can't resolve 'utf-8-validate' in '/Users/laike9m/Dev/VSC/vscode-debug-visualizer/extension/node_modules/ws/lib'
 @ ./node_modules/ws/lib/validation.js
 @ ./node_modules/ws/lib/receiver.js
 @ ./node_modules/ws/index.js
 @ ./src/Server.ts
 @ ./src/extension.ts

WARNING in ../node_modules/ws/lib/validation.js
Module not found: Error: Can't resolve 'utf-8-validate' in '/Users/laike9m/Dev/VSC/vscode-debug-visualizer/node_modules/ws/lib'
 @ ../node_modules/ws/lib/validation.js
 @ ../node_modules/ws/lib/receiver.js
 @ ../node_modules/ws/index.js
 @ ../node_modules/isomorphic-ws/node.js
 @ ../node_modules/@hediet/typed-json-rpc-websocket/dist/index.js
 @ ./src/Server.ts
 @ ./src/extension.ts

ERROR in ../node_modules/chokidar/node_modules/fsevents/fsevents.node 1:0
Module parse failed: Unexpected character '�' (1:0)
You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders
(Source code omitted for this binary file)
 @ ../node_modules/chokidar/node_modules/fsevents/fsevents.js 13:15-41
 @ ../node_modules/chokidar/lib/fsevents-handler.js
 @ ../node_modules/chokidar/index.js
 @ ../node_modules/@hediet/node-reload/dist/HotReloadService.js
 @ ../node_modules/@hediet/node-reload/dist/hotRequire.js
 @ ../node_modules/@hediet/node-reload/dist/index.js
 @ ./src/extension.ts
error Command failed with exit code 2.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
error Command failed.
Exit code: 2
Command: /usr/local/Cellar/node/14.3.0/bin/node
Arguments: /usr/local/Cellar/yarn/1.22.4/libexec/lib/cli.js build
Directory: /Users/laike9m/Dev/VSC/vscode-debug-visualizer/extension
Output:

info Visit https://yarnpkg.com/en/docs/cli/workspace for documentation about this command.
error Command failed with exit code 2.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
error Command failed with exit code 2.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

Did some search, seems to be related to this issue:
fsevents get error "Module parse failed: Unexpected character '�' (1:0)".

Any ideas how I should proceed?

System information

Version: 1.45.1
Commit: 5763d909d5f12fe19f215cbfdd29a91c0fa9208a
Date: 2020-05-14T08:33:47.663Z
Electron: 7.2.4
Chrome: 78.0.3904.130
Node.js: 12.8.1
V8: 7.8.279.23-electron.0
OS: Darwin x64 19.4.0

[hediet]

I'll have a look at it tomorrow!

[laike9m]

Thanks!

[hediet]

Fixed now.