Background indexing generates confusion when debugging in VSCode

[adam-fowler]

Swift version

Apple Swift version 6.1 (swiftlang-6.1.0.110.21 clang-1700.0.13.3)

Platform

macOS 15.4.1 (24E263)

Editor

Visual Studio Code

Description

Because background indexing jumps to code in a separate folder (ie .build/index-build) from the code actually being used to build your package. If you set a break point in that code it is never hit.

Steps to Reproduce

• Load project with dependencies
• Right click on function that is defined in one your dependencies and select Go to definition.
• Add break point in that function
• Run in debugger
• Break point is never hit

Logging

No response