microsoft / microsoft/vs-streamjsonrpc

Should we block exotic types from transmission in exceptions?

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C#
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Description

When returning a JSON-RPC error response, I suspect it would be a good play to block transmission of any exotic types. This is primarily because exotic types tend to pin resources till the receiving side fulfills some contract (e.g. disposing of the received proxy), and in the exception case this is more likely to be missed.
While blocking such a thing would be a breaking change, it's unlikely anyone depends on it right now.

Consider that exceptions might be sent as arguments or return values (rather than thrown), and in such cases we may want to continue allowing exotic types.

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Research direction

Trace the JSON-RPC error-response serialization and the paths that send exceptions as thrown errors versus arguments or return values. Confirm how exotic types are currently transmitted and identify the tests covering each path; the issue is done when the intended blocking rule and compatibility behavior are agreed and covered by tests.

Written by the indexing model from the issue text.

Assessment

Tech stack
csharp
Domain
api
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
20/100

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