ReferenceError when running Next.js app with AppMap

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#175 opened on Oct 1, 2024 0 comments 0 reactions 0 assignees View on GitHub

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Dominant language: TypeScript
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Forks: 6
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Description

Hello AppMap team,

I encountered an issue while trying to run my Next.js application with AppMap. When executing the command npx appmap-node npx next start, I received the following error:

⨯ ReferenceError: Cannot access 'default' before initialization
at Object.default (webpack-internal:///./node_modules/next/dist/client/router.js:21:9)
at Function.entries (<anonymous>)
at propertiesSchema (/node_modules/appmap-node/dist/parameter.js:143:19)
at parameterSchema (/node_modules/appmap-node/dist/parameter.js:120:29)
at parameter (/node_modules/appmap-node/dist/parameter.js:21:20)
at optParameter (/node_modules/appmap-node/dist/parameter.js:90:12)
at makeReturnEvent (/node_modules/appmap-node/dist/event.js:31:52)
at Recording.functionReturn (/node_modules/appmap-node/dist/Recording.js:56:51)
at /node_modules/appmap-node/dist/recorder.js:100:58
at Array.forEach (<anonymous>)
at record (/node_modules/appmap-node/dist/recorder.js:100:20)
at webpack_require (/build/server/webpack-runtime.js:33:27)

It seems that there might be an incompatibility between AppMap and my Next.js project, specifically related to the router initialization.

Environment:

Next.js version: 14.2.3
AppMap version: 2.24.3
Node.js version: 18.17.1

Thank you!

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First steps

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Research direction

Start by reproducing npx appmap-node npx next start with Next.js 14.2.3, AppMap 2.24.3, and Node.js 18.17.1. Trace the failure through the reported appmap-node/dist/parameter.js, event.js, Recording.js, and recorder.js paths, then verify that the Next.js app starts without the ReferenceError.

Written by the indexing model from the issue text.

Assessment

Tech stack: next.js, node.js, typescript
Domain: backend, web-dev
Issue type: Bug
Difficulty: 4/5
Estimated time: 3-5 days
Activity status: Stale
Clarity: Needs clarification
Newbie friendliness: 35/100