Autocompletion overwrites following characters

[fly1n]

Autocompletion overwrites following characters

Environment

• Operating System: Windows 10 Pro (64 bits)
• JDK version: JDK8_144, JDK8_151, , JDK8_152, OpenJdk8_144
• Visual Studio Code version: 1.17.2
• Java extension version: 0.12.0

Steps To Reproduce

1. [step 1] Type "<Integer>"
2. [step 2] Put cursor before "<Integer>", Type "Array", waiting for autocompletion to show "ArrayList". Select "ArrayList", several characters of the following "<Integer>" will be overwriten.

This bug can be easily reproduced on all java files.

Current Result

Sometimes "ArrayListInteger>", sometimes "ArrayListeger>", sometimes "ArrayList<Integer>"

Expected Result

"ArrayList<Integer>"

[fbricon]

This works fine in Eclipse, so definitely a bug in jdt.ls side

[fly1n]

Is this bug fixed in 0.13.0? I still have this bug.

[fbricon]

Yes it's supposed to be fixed. Can you still reproduce this issue consistently?

[fly1n]

Yes. I tried several times. This bug still appear consistently. I am using OpenJDK8_151 now.

[fbricon]

@fly1n please set java.trace.server to verbose in VS Code's preferences, so we can trace messages exchanged between the server and VSCode. Then you can attach your VSCode logs (see Language Support for Java in the Output view)

[fly1n]

vscode_log.txt

[snjeza]

@fbricon it seems that a timeout of 1 sec sometimes isn't enough.

@fly1n could you try the following:

• type Array
• when VS Code shows the ArrayList completion, wait for a few seconds
• apply completion

[fly1n]

I know that this bug does not happen when I wait for few seconds, but you can't expect every user to wait for few seconds before autocompletion, right?

[snjeza]

@fly1n Right. I just wanted to check if a timeout is the cause of the issue because I can't reproduce it.

@fbricon will we increase a timeout?

[fly1n]

Sorry, I thought this does not happen after waiting for few seconds but did not really test it. I test it again for few times, it happens even after I wait for about 10 seconds. I also found another behavior.
In my project, when I type "LSR" before "()", the expected autocompletion is "LSRNIC", apart from the case that autocompletion sometimes overwrites following "()", the autocompletion itself is not consistent as it sometimes ends with "LSRNIC(parent))", sometimes ends with "LSRNIC)" (overwrites one character "("), sometimes "LSRNIC" (completely overwrites "()").

[snjeza]

I still can't reproduce the issue with VS Code Java 0.13.0. Please take a look at https://www.screencast.com/t/vTKvleEJcvk

[fly1n]

I tried to use the same file as you, and this bug did not happen in that file. I can send you my project. Since it is my course project, I do not want to upload it to github, can you give me your email please?

[snjeza]

[email protected]

[fbricon]

I've tried very hard to autocomplete as fast as I can (definitely sub second) and can't reproduce it either.

[snjeza]

@fly1n try to reinstall the VS Code Java LS extension. It is possible that you are using an older version.

[fly1n]

I reinstalled the whole VS code with only Java extension, this bug still appears.

[fly1n]

Can you try to just type lower case "ls" before "()", and then select the first autocompletion ("LSR"). This setting is able to reproduce the bug in my side.

[snjeza]

Can you try to just type lower case "ls" before "()", and then select the first autocompletion ("LSR"). This setting is able to reproduce the bug in my side.

I have tried it, but can't reproduce the issue.

@fly1n Could you check your VS Code Java LS version?

[fly1n]

See this: https://www.screencast.com/t/7s73x82XKb, it is 0.13.0.

[snjeza]

@fly1n could you disable other extensions?

[fly1n]

https://www.screencast.com/t/aKkFvziNcJt2
I reinstalled VS Code 1.18.0 with only Java LS 0.14.0.

[snjeza]

@fly1n could you try with https://drive.google.com/open?id=1nckes1kPJrj791B0KYzv2E0kgEgq_Kj7 ?

[fly1n]

Unfortunately the bug still happens.

[snjeza]

@fly1n I suppose you have a very fast machine. What hardware are you using?
Could you try to reproduce the issue using https://drive.google.com/open?id=1WZJ8hXd3QuRpAkfLJo0X_uft70LpyRcp ?

[fly1n]

Cool! This version works for me. Now I do not have that bug.

[fly1n]

This bug happens much less after I use your newest version, but it still happens few times when I wrote code. So, I think this solution is still not a radical one.

[snjeza]

@fly1n could you test https://drive.google.com/open?id=1eG0KB3OmbYYSs6Rl_HwDcCPDqK_tuNL5

[fly1n]

I used the newest one for one day. It seems that this bug is completely resolved in the newest version.

[fbricon]

with @snjeza's fix, not only is autocompletion more robust, it's also now super fast!