When mocking a function that has a JavaScript syntax error, nothing happens, endless wait

[berenddeboer]

Describe the bug
Make a syntax error in your index.js. Then mock the function. Mock will hang until you press Ctrl+C.

Then you get the useless:

Starting execution...
^Cundefined:1



SyntaxError: Unexpected end of JSON input
at JSON.parse (<anonymous>)
at ChildProcess.<anonymous> (/usr/lib/node_modules/@aws-amplify/cli/node_modules/amplify-nodejs-function-runtime-provider/lib/utils/invoke.js:45:37)
at ChildProcess.emit (events.js:315:20)
at ChildProcess.EventEmitter.emit (domain.js:483:12)
at maybeClose (internal/child_process.js:1021:16)
at Socket.<anonymous> (internal/child_process.js:443:11)
at Socket.emit (events.js:315:20)
at Socket.EventEmitter.emit (domain.js:483:12)
    at Pipe.<anonymous> (net.js:674:12)

A clear and concise description of what the bug is.

Amplify CLI Version
4.27.3

To Reproduce
Make a syntax error in your index.js. Then mock.

Expected behavior
The actual error returned by nodejs.

Desktop (please complete the following information):

• OS: Ubuntu 20.04
• Node Version: 12.18.3

[berenddeboer]

Might be fixed by #4978.

[devyzr]

Might be fixed by #4978.

It doesn't for me

[dmsolutionz]

Version 4.24.3 was the last known good version where even simple logging events worked properly, now mocking will force a hang, or give unusable logging / error messaging. Basically making our amplify project currently locked to 4.24.3...

[kaustavghosh06]

We've fixed this issue as a part of #5198

[github-actions]

This issue has been automatically locked since there hasn't been any recent activity after it was closed. Please open a new issue for related bugs.

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