eclipse-theia/theia

Variables request contains filter object that should not be there (in VS Code filer is null)

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#8792 opened on Nov 27, 2020

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Description

Bug Description:

Hello, I am working on COBOL Debugger for Mainframe. The issue is that Theia behavior is different from VS Code.

When VS Code does not contain a filter for variables request Thea has is:

6109e05c theia -> adapter: {"seq":20,"type":"request","command":"variables",
"arguments":{"variablesReference":3,"filter":"indexed","start":0}}

The issue is that command contains { "filter":"indexed","start":0 } that VS Code not contans.

Steps to Reproduce:

  1. Update Thea with Cobol Debugger for Mainframe extension
  2. Add breakpoint for Cobol document
  3. Run Thea and Run debugger for Cobol
  4. Open Output
  5. Choose Debug Adapter
  6. Open variables from the left panel
  7. Output contains the command "variables" with the filter parameter

Contributor guide

Tech stack
typescriptnodejs
Domain
backenddeveloper experience
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
under 1 hour
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Debug Adapter Protocol knowledgeTypeScriptTheia codebase structure
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
80
Research direction
Investigate the VariablesRequest handling in the Theia debug adapter code (likely in packages/debug or similar). Compare with VS Code's behavior to understand when filter should be omitted. The fix might involve modifying the request construction to only include filter when it is explicitly set by the adapter.