Uncaught TypeError: Cannot read property 'prototype' of undefined

[misland]

What is the current behavior?
I just import mongoose in a project that initialized by vue-cli 2.0,when I run the project ,an error thrown as the title said,can anyone explain why?thanks!!
here is the detail of error:
Uncaught TypeError: Cannot read property 'prototype' of undefined
at eval (webpack-internal:///./node_modules/mongoose/lib/types/buffer.js:184)
at Array.forEach ()
at Object.eval (webpack-internal:///./node_modules/mongoose/lib/types/buffer.js:183)
at eval (webpack-internal:///./node_modules/mongoose/lib/types/buffer.js:306)
at Object../node_modules/mongoose/lib/types/buffer.js (app.bundle.js:2554)
at webpack_require (app.bundle.js:679)
at fn (app.bundle.js:89)
at Object.eval (webpack-internal:///./node_modules/mongoose/lib/schema/buffer.js:10)
at eval (webpack-internal:///./node_modules/mongoose/lib/schema/buffer.js:225)
at Object../node_modules/mongoose/lib/schema/buffer.js (app.bundle.js:2386)
at webpack_require (app.bundle.js:679)
at fn (app.bundle.js:89)
at eval (webpack-internal:///./node_modules/mongoose/lib/schema/array.js:19)
at Object../node_modules/mongoose/lib/schema/array.js (app.bundle.js:2370)
at webpack_require (app.bundle.js:679)
at fn (app.bundle.js:89)

Please mention your node.js, mongoose and MongoDB version.
Node.js 8.12
mongoose 5.3.5
MongoDB 4.0.3

[nikdunn]

The fix for this issue: #7102 seems to have been what introduces this bug. There is no Buffer property on global when NodeBuffer gets created.

[misland]

The fix for this issue: #7102 seems to have been what introduces this bug. There is no Buffer property on global when NodeBuffer gets created.

thanks my friend

[nikdunn]

Why did you close this Issue? It's not fixed. This should be an open issue.
@misland Can you reopen the issue?
@vkarpov15 I wanted to bring this to your attention. Thanks.

@nikdunn does 5.3.6 fix the issue for you?

[nikdunn]

No, @Lineus , 5.3.6 is where the issue is introduced. I was using 5.3.4 and then an npm install bumped me to 5.3.6 where I started experiencing the issue.

this issue was introduced in @5.3.5

I am able to replicate this using a new vue-cli@2.9.6 webpack app and just adding the mongoose import statement import mongoose from 'mongoose/browser'; on mongoose@5.3.{5,6}. On mongoose@5.3.4 it works without issue.

I am also able to repro this using create-react-app and mongoose@5.3.{5,6}.

[misland]

@nikdunn sorry that I didn't quite familar with github issues,@Lineus has opened this already

[vkarpov15]

Thanks for helping us find this issue. We started using the core node buffer for a couple use cases to work around a bug in safe-buffer (feross/safe-buffer#23) .