Completion on dot inputs double dot

Expected behaviour

Choosing a completion should not add double dots

Actual behaviour

It adds an extra dot

Steps to reproduce:

1. Edit a cell
2. input (Path('/') / d['metadata'])
3. Type a dot after the above expression, and choose one of the members of Path (e.g. name or `with_suffix)
4. Note that the path needs to contain a dictionary access, otherwise it works fine, so I guess it’s the [ .. ] that has the bug.

https://user-images.githubusercontent.com/2991890/121210950-66bb8f80-c87c-11eb-973d-3224b220c41a.mp4

Logs

nothing generated by the completion

Environment data

• VS Code version: 1.57.0-insider Commit: c7119ae8b6390a5700f6b28f0f1511d676c96562
• Jupyter Extension version (available under the Extensions sidebar): v2021.6.914258744
• Python Extension version (available under the Extensions sidebar): v2021.6.908196464-dev | Pylance v2021.6.1-pre.1
• OS (Windows | Mac | Linux distro) and version: Local = Mac 10.15.7 | Remote = Ubuntu 18.04
• Python and/or Anaconda version: 3.7.4
• Type of virtual environment used : conda
• Jupyter server running: Remote

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This should have probably been in Pylance. Initially I thought it only happens in jupyter, as shown in the video, but then I noticed the point 4 in Steps to reproduce (after opening this issue). If we do (Path('.') / d['a']).<ctrl+space> in a normal python file, it doesn’t offer any completion at all, so probably not related to jupyter

[greazer]

I’m no longer able to reproduce this problem using the latest VS Code Insider, PyLance, Python, and Jupyter extensions. Somewhere the bug must’ve been fixed. @cipri-tom, please reopen if you’re still seeing this behavior.

[IanMatthewHuff]

Moving to triage.