next(): Promise<IteratorResult<T,T>>; -> Method from core-paging is giving a error.

[sudeepghosh0]

• @azure/core-paging/types/3.1/core-paging.d.ts:
• "@azure/storage-blob": "^12.8.0":
• Operating system:
• nodejs
  • v.12.13.0:
• browser
  • name/version:
• typescript
  • version:
• Is the bug related to documentation in
  • README.md
  • source code documentation
  • SDK API docs on https://docs.microsoft.com

Describe the bug
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ERROR in ../node_modules/@azure/core-paging/types/3.1/core-paging.d.ts:16:21 - error TS2314: Generic type 'IteratorResult' requires 1 type argument(s).

16 next(): Promise<IteratorResult<T,T>>;

To Reproduce
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1.

Expected behavior
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Screenshots
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Additional context
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[ramya-rao-a]

@sudeepghosh0 Can you please share a code snippet that can show how to reproduce the error?

[sudeepghosh0]

Steps to reproduce the error:-
Create a simple project in angular - 8.
Run - npm install @azure/storage-blob
Create a angular service and implement a uploadblob function.
When you are done with the above steps do "ng serve" and you should get the error.
Attaching my service file for reference.
sample-service-file.txt

[jeremymeng]

The latest supported TypeScript version is 3.4.5 for Angular 8. We probably need to support more down-level versions like we did in #10599

[jeremymeng]

Ah, we deleted our hand-crafted 3.1 type definition, and replaced it with the output of api-extractor #16732, which doesn't have the expected types. Look like downlevel-dts cannot handle the breaking changes in the type definitions.

[jeremymeng]

So we had had a hand-crafted core-paging.d.ts for 3.1 where we used IteratorResult<T>. After replaced it with downlevel-dts and api-extractor output, we now have IteratorResult<T,T> which isn't expected by lower versions (< 3.6) of TypeScript compiler

[deyaaeldeen]

Hi @sudeepghosh0, thanks for filing this report! I created a fix in #19507. Until the fix is released, you can use this patched package.

Please let me know if you have any questions!

[ghost]

Hi @sudeepghosh0. Thank you for opening this issue and giving us the opportunity to assist. We believe that this has been addressed. If you feel that further discussion is needed, please add a comment with the text “/unresolve” to remove the “issue-addressed” label and continue the conversation.

[sudeepghosh0]

Thanks for the quick response.
can you please tell me how can i use the patched package in my project.
if i run "npm i @azure/[email protected]" its installing the old packages only.
" next(): Promise<IteratorResult<T, T>>;"

[deyaaeldeen]

@sudeepghosh0 please download the tarball file from the link I shared above and then run npm install <path to the tarball file> in your NodeJS project directory.

[sudeepghosh0]

Thank You.

[ramya-rao-a]

@deyaaeldeen Please use the patched package only for testing and not in production. For your production usage, please wait for the official release which we should be able to get out in the first week of January 2022

[Leodecko]

Hello, is there a fix for this issue? I have the same problem.

[deyaaeldeen]

@Leodecko Could you please share the version of @azure/core-paging installed in your project and the typescript compiler? v1.2.1 has the fix in #19507.

[Leodecko]

Actually, the azure/storage-blob library is the one that is causing the issue I'm not using @azure/core-paging, the version of the storage-blob that we are using in our angular 8 protect is: 12.8.0
Thanks in advanced

[deyaaeldeen]

Thanks @Leodecko for the information!

Could you please share the full error and the version of @azure/storage-blob you're using?

[Leodecko]

When we try to build the app this is the error that is throwing us.
Our typescript version is : 3.5.3

[deyaaeldeen]

@Leodecko thanks! The error is coming from core-paging which is one of the dependencies of @azure/storage-blob. @azure/[email protected] is the most recent version of that package and has a fix for this issue. Could you please upgrade the dependencies in your project by deleting the node_modules folder and running npm install again to install latest versions?

You can also try installing @azure/[email protected] explicitly by running npm install @azure/core-paging@^1.2.1.

Please let me know whether this solved the issue.

[maorleger]

@Leodecko just FYI, Deya and I chatted and we want to recommend that instead of installing @azure/core-paging as a top-level dependency can you try the following:

# show the version of core-paging which I assume is 1.2.0 at this time
angular8 main % npm ls @azure/core-paging
[email protected] /home/mleger/workspace/azure-sdk-experiments/local/angular8
└─┬ @azure/[email protected]
  └── @azure/[email protected] 

# update @azure/core-paging to 1.2.1 (the latest) 
angular8 main % npm update @azure/core-paging

# show the version of core-paging again, which should be 1.2.1
angular8 main % npm ls @azure/core-paging
angular8 main % npm ls @azure/core-paging              
[email protected] /home/mleger/workspace/azure-sdk-experiments/local/angular8
└─┬ @azure/[email protected]
  └── @azure/[email protected] 

Hopefully that helps get you on a version of core-paging that contains the fix without deleting node_modules or your lock-file. let us know if that resolves your issues!

Just FYI - if nothing happens after you run npm update, you might be on an older version of npm and can try

npm update @azure/core-paging --depth 2