`Error while consuming 'textDocument/declaration' with language server 'SourceKit-LSP'` while editing a Swift file in IntelliJ 2025.3.3

[rgoldberg]

Get the following error in IntelliJ 2025.3.3 while editing a Swift file.

Error while consuming 'textDocument/declaration' with language server 'SourceKit-LSP'

org.eclipse.lsp4j.jsonrpc.ResponseErrorException: unsupported method
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.handleResponse(RemoteEndpoint.java:209)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.consume(RemoteEndpoint.java:193)
	at com.redhat.devtools.lsp4ij.LanguageServerWrapper.lambda$start$4(LanguageServerWrapper.java:387)
	at java.base/java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1804)
	at java.base/java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1796)
	at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:507)
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1491)
	at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:2073)
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:2035)
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:187)

[angelozerr]

This error comes from 'SourceKit-LSP' language server. It seems it notifies that it supports textDocument/declaration' although it seems it doesn't support it.

Could you enable LSP trace as verbose (see https://github.com/redhat-developer/lsp4ij/blob/main/docs/UserGuide.md#lsp-console) and share your trace please.