dotnet/roslyn

Duplicate ERRID.ERR_TooLongOrComplexExpression error is reported

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#5,612 opened on Oct 1, 2015

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Area-CompilersBugConcept-Diagnostic ClarityLanguage-VBhelp wanted

Description

See unit-test EmitSequenceOfBinaryExpressions_06 in https://github.com/dotnet/roslyn/blob/master/src/Compilers/VisualBasic/Test/Emit/CodeGen/CodeGenTests.vb#L13402

Contributor guide

Tech stack
csharp
Domain
developer experience
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
over 1 week
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.
needs investigation
Prerequisites
Roslyn compiler internalsVB.NET syntaxUnit testing in Roslyn
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
20
Research direction
Start by examining the unit test 'EmitSequenceOfBinaryExpressions 06' in 'src/Compilers/VisualBasic/Test/Emit/CodeGen/CodeGenTests.vb' around line 13402. Understand the scenario that triggers the duplicate error. Investigate the code path in the Visual Basic compiler that emits the error ERR TooLongOrComplexExpression. Look for where the error is reported and ensure it is only reported once. Check if there are any other related issues or PRs that attempted to fix this.