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[5.10] Never return error for diagnostics request #1022

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Merged
merged 1 commit into from
Jan 17, 2024
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[5.10] Never return error for diagnostics request #1022

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7 changes: 4 additions & 3 deletions Sources/SourceKitLSP/Swift/SwiftLanguageServer.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -1476,9 +1476,10 @@ extension SwiftLanguageServer {
req.reply(.full(.init(items: diagnostics)))

case .failure(let error):
let message = "document diagnostic failed \(uri): \(error)"
log(message, level: .warning)
return req.reply(.failure(.unknown(message)))
// VS Code does not request diagnostics again for a document if the diagnostics request failed.
// Since sourcekit-lsp usually recovers from failures (e.g. after sourcekitd crashes), this is undesirable.
// Instead of returning an error, return empty results.
return req.reply(.full(.init(items: [])))
}
}
}
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