[Bug]: Code actions fail to apply the TextEdits intermittently

[malinthar]

Description

I observed the above behaviour when I was trying to select a code action and apply the text edits. The text edits were not applied. I tried this for multiple times and then it worked. I don't have a specific scenario yet to reproduce this. But creating this issue to track the effort of reproducing and finding the cause for the behaviour.

Steps to Reproduce

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Affected Version(s)

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OS, DB, other environment details and versions

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Related area

-> Editor

Related issue(s) (optional)

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Suggested label(s) (optional)

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[malinthar]

I was able to reproduce the issue as depicted in the following capture.

When investigated could not find anything off(buggy) on the LS side that causes this. The codeActions() remote procedure's response is the same when its working(text-edits are applied) and not working. Therefore, this may be due to an issue in the plugin. Have to dig deep and figure out.

[malinthar]

Pull module code action shows the same behaviour.

[malinthar]

Pull module code action shows the same behaviour.

This does not happen when there is 2 newlines in between the import statement and main function

[malinthar]

Figured out that the issue occurs only when the a code action is selected on a line of a code lens, (Run|Debug|Visualize) in the above case. When the code action is selected it also navigates to the closest line /token as depicted in #40501 (comment). I believe, this triggers a new textDocumentService/codeAction request cancelling the progression of the previous codeAction request. Have to investigate and figure out a solution for this.

[malinthar]

This seems to be a bug in VSCode. Releated issue microsoft/vscode#169854