sourcekitd silently fails

[award999]

Swift version

swiftlang-6.0.3.1.4

Platform

macOS 15

Editor

VS Code

Description

When there is an SDK mismatch, sourcekitd silently fails

Steps to Reproduce

1. Have a tasks.json entry that points to an SDK from one Xcode installation
2. Build that task
3. Configure the SDK in settings to points to an SDK from a different Xcode installation
4. Reload the window
5. Next time sourcekit-lsp starts, no IntelliSense is available
6. Open the output channel and should see an error like this

2024-11-05 13:32:44.195827-0500 0x47bb1    Error       0x0                  29814  0    sourcekit-lsp: [org.swift.sourcekit-lsp:request-26] Received sourcekitd response:
error response (Request Failed): Loading the standard library failed

Logging

No response

[award999]

observed as swiftlang/vscode-swift#1201 against vscode-swift

[ahoppen]

Synced to Apple’s issue tracker as rdar://139514623

[ahoppen]

To be clear, SourceKit does not crash here, it just fails. But the end result looks similar to the user.

[award999]

@ahoppen ya thought I saw a crash in the log but you're right