dotnet/roslyn

Investigate improving diagnostic for missing metadata references

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#4,676 建立於 2015年8月20日

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Area-CompilersBugConcept-Diagnostic Clarityhelp wanted

描述

In the fix to (TFS/DevDiv) bug 1090472 there was a slight degradation in the quality of the diagnostics for symbols missing due to missing metadata references for the test BadSymbolReferences.MissingTypes1. Before the change the required assembly reference was given in the diagnostic. After the change it does not suggest the required assembly.

Investigate the cause of the degradation and see if the quality of the diagnostic can be restored.

(Migrated from TFS/DevDiv 1091957)

貢獻者指南

技術棧
csharp
領域
tooling
議題類型
bug
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
4
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
over 1 week
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
needs investigation
前置要求
C# languageRoslyn compiler internals
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
10
研究方向
Investigate the regression in diagnostic quality for missing metadata references, specifically for the test `BadSymbolReferences.MissingTypes1` introduced by the fix to bug 1090472. Examine the changes in how required assembly references are reported, focusing on the symbol resolution and error reporting code in Roslyn's binding layer. Look for comments or changes in the relevant source files (likely under `src/Compilers/CSharp/Portable/Binder/`) to identify how the diagnostic suggestion was lost. The goal is to restore the diagnostic to suggest the required assembly.