Unexpected closing brace error from import-in-the-middle

[FozzieHi]

Is there an existing issue for this?

• I have checked for existing issues https://github.com/getsentry/sentry-javascript/issues
• I have reviewed the documentation https://docs.sentry.io/
• I am using the latest SDK release https://github.com/getsentry/sentry-javascript/releases

How do you use Sentry?

Sentry Saas (sentry.io)

Which SDK are you using?

@sentry/node

SDK Version

8.15.0

Framework Version

No response

Link to Sentry event

No response

SDK Setup/Reproduction Example

No response

Steps to Reproduce

Branching off this issue, when running import-in-the-middle v1.8.1, I'm getting the following error:

Error: 'import-in-the-middle' failed to wrap 'file:///app/node_modules/zlib-sync/index.js'
 at getSource (/app/node_modules/import-in-the-middle/hook.js:304:21)
 at async load (/app/node_modules/import-in-the-middle/hook.js:319:26)
 at async nextLoad (node:internal/modules/esm/hooks:866:22)
 at async Hooks.load (node:internal/modules/esm/hooks:449:20)
 at async handleMessage (node:internal/modules/esm/worker:196:18) {
 cause: Error: Unexpected closing brace.
 at @:4:142
 at parseSource (/app/node_modules/cjs-module-lexer/lexer.js:185:17)
 at parseCJS (/app/node_modules/cjs-module-lexer/lexer.js:43:5)
 at getCjsExports (/app/node_modules/import-in-the-middle/lib/get-exports.js:37:20)
 at getExports (/app/node_modules/import-in-the-middle/lib/get-exports.js:100:12)
 at async /app/node_modules/import-in-the-middle/lib/get-exports.js:48:28
 at async Promise.all (index 0)
 at async getCjsExports (/app/node_modules/import-in-the-middle/lib/get-exports.js:40:5)
 at async processModule (/app/node_modules/import-in-the-middle/hook.js:131:23)
 at async getSource (/app/node_modules/import-in-the-middle/hook.js:269:25)
 at async load (/app/node_modules/import-in-the-middle/hook.js:319:26) {
 loc: 973
 }
}

This causes this from discord.js:

WebSocketShard: Compression is enabled but zlib-sync is not installed, falling back to identify compress

It still occurs with import-in-the-middle v1.9.0, but as a warning, this is the output with --trace-warnings enabled:

WebSocketShard: Compression is enabled but zlib-sync is not installed, falling back to identify compress
(node:1) Warning: Error: 'import-in-the-middle' failed to wrap 'file:///app/node_modules/zlib-sync/index.js'
 at getSource (/app/node_modules/import-in-the-middle/hook.js:366:21)
 at async load (/app/node_modules/import-in-the-middle/hook.js:381:26)
 ... 2 lines matching cause stack trace ...
 at async handleMessage (node:internal/modules/esm/worker:196:18) {
 cause: Error: Failed to parse 'file:///app/node_modules/zlib-sync/index.js'
 at getExports (/app/node_modules/import-in-the-middle/lib/get-exports.js:118:17)
 at async processModule (/app/node_modules/import-in-the-middle/hook.js:172:23)
 ... 3 lines matching cause stack trace ...
 at async Hooks.load (node:internal/modules/esm/hooks:449:20)
 at async handleMessage (node:internal/modules/esm/worker:196:18) {
 cause: Error: Failed to parse 'file:///app/node_modules/zlib-sync/build/Release/zlib_sync.node'
 at getExports (/app/node_modules/import-in-the-middle/lib/get-exports.js:118:17)
 at async /app/node_modules/import-in-the-middle/lib/get-exports.js:51:28
 ... 4 lines matching cause stack trace ...
 at async getSource (/app/node_modules/import-in-the-middle/hook.js:331:25)
 at async load (/app/node_modules/import-in-the-middle/hook.js:381:26)
 at async nextLoad (node:internal/modules/esm/hooks:866:22)
 at async Hooks.load (node:internal/modules/esm/hooks:449:20) {
 cause: [Error]
 }
 }
}
 at emitWarning (/app/node_modules/import-in-the-middle/hook.js:156:11)
 at getSource (/app/node_modules/import-in-the-middle/hook.js:368:9)
 at async load (/app/node_modules/import-in-the-middle/hook.js:381:26)
 at async nextLoad (node:internal/modules/esm/hooks:866:22)
 at async Hooks.load (node:internal/modules/esm/hooks:449:20)
 at async handleMessage (node:internal/modules/esm/worker:196:18)

Expected Result

N/A

Actual Result

N/A

[AbhiPrasad]

Hey @FozzieHi thanks for the new issue. I'll let @timfish handle taking a look at this, and it's also being tracked under our main umbrella issue for all instrumentation problems: #12806

[timfish]

Handling of native modules needs improving in import-in-the-middle and I've opened an issue to address this but currently this is just logging a warning when it's encountered and it shouldn't impact @sentry/node.

[FozzieHi]

Thanks @timfish, if it is just a warning, I'm wondering why it's causing discord.js to log this out:

WebSocketShard: Compression is enabled but zlib-sync is not installed, falling back to identify compress

I've taken a brief look at the discord.js code, and it looks like it is affecting this line, which if it's falsy, causes the message to be logged out:

const getZlibSync = lazy(async () => import('zlib-sync').then((mod) => mod.default).catch(() => null));

https://github.com/discordjs/discord.js/blob/311aaf26058c7a95f6d973686e49818c9ecb0fb1/packages/ws/src/ws/WebSocketShard.ts#L177