dotnet/msbuild

Refactor ExecuteInstantiatedTask exception handling

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#790 opened on Jul 19, 2016

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Area: Debuggabilityhelp wantedtriaged

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Description

There's a great deal of logic in ExecuteInstantiatedTask designed to handle exceptions thrown by tasks: https://github.com/Microsoft/msbuild/blob/4b30fac51ab58dadfffedb2a57e83b8398e3a5e1/src/XMakeBuildEngine/BackEnd/Components/RequestBuilder/TaskBuilder.cs#L720

Included in a lot of that logic is "rethrow wrapped to preserve stack", which was required in C# before C# 6. But now we have exception filters, which could simplify this logic and preserve stacks for free.

This is an important part of failure handling, so we'd need to make sure the right behavior from the existing logic is preserved.

Contributor guide

Research direction
Research the current exception handling logic in ExecuteInstantiatedTask, understand C# 6 exception filters, and ensure tests cover the refactored code.
Tech stack
csharp
Domain
build system
Issue type
Refactor
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.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
GitC#
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75