microsoft / microsoft/vs-threading

!dumpasync Failed to parse the output of !do 0000000000000000: Invalid parameter 0000000000000000

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C#
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Description

Bug description
0:000> !dumpasync
Failed to parse the output of !do 0000000000000000: Invalid parameter 0000000000000000

Failed to parse the output of !do 0000000000000000: Invalid parameter 0000000000000000

Failed to parse the output of !do 0000000000000000: Invalid parameter 0000000000000000

Failed to parse the output of !do 0000000000000000: Invalid parameter 0000000000000000

Failed to parse the output of !do 0000000000000000: Invalid parameter 0000000000000000

Failed to parse the output of !do 0000000000000000: Invalid parameter 0000000000000000

[actual stacks]
Repro steps

I can provide a dump internally if needed.

Expected behavior

The actual task "stacks"

Actual behavior

Failed to parse the output of !do 0000000000000000: Invalid parameter 0000000000000000

  • Version used: v15.8.168.release.zip
  • Application (if applicable): windbg
Additional context

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing !dumpasync in WinDbg with the reported v15.8.168.release.zip version and obtain the dump mentioned in the issue. Trace why the command produces an invalid zero address instead of actual task stacks, then verify that !dumpasync reports the stacks without parse errors.

Written by the indexing model from the issue text.

Assessment

Tech stack
csharp
Domain
devtools
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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