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x/tools/gopls: CodeAction: unexpected JSON unmarshalling error in BundledLazyFixes (via telemetry) #68819

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adonovan opened this issue Aug 9, 2024 · 2 comments
Open

x/tools/gopls: CodeAction: unexpected JSON unmarshalling error in BundledLazyFixes (via telemetry) #68819

adonovan opened this issue Aug 9, 2024 · 2 comments
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gopls/telemetry-wins gopls Issues related to the Go language server, gopls. Tools This label describes issues relating to any tools in the x/tools repository.
Milestone
gopls/v0.17.0

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@adonovan
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adonovan commented Aug 9, 2024

This stack pA-Ukg was reported by telemetry:

gopls/bug
golang.org/x/tools/gopls/internal/util/bug.report: 35
golang.org/x/tools/gopls/internal/util/bug.Reportf: 1
golang.org/x/tools/gopls/internal/cache.BundledLazyFixes: 5
golang.org/x/tools/gopls/internal/server.(*server).codeActionsMatchingDiagnostics: 4
golang.org/x/tools/gopls/internal/server.(*server).CodeAction: 96
golang.org/x/tools/gopls/internal/protocol.serverDispatch: 160
golang.org/x/tools/gopls/internal/lsprpc.(*streamServer).ServeStream.ServerHandler.func3: 5
golang.org/x/tools/gopls/internal/lsprpc.(*streamServer).ServeStream.handshaker.func4: 52
golang.org/x/tools/gopls/internal/protocol.Handlers.MustReplyHandler.func1: 2
golang.org/x/tools/gopls/internal/protocol.Handlers.AsyncHandler.func2.2: 3
runtime.goexit: 0

golang.org/x/tools/[email protected] go1.22.4 darwin/arm64 other (2)

Issue created by golang.org/x/tools/gopls/internal/telemetry/cmd/stacks.
@adonovan adonovan added NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. gopls Issues related to the Go language server, gopls. Tools This label describes issues relating to any tools in the x/tools repository. gopls/telemetry-wins labels Aug 9, 2024
@gopherbot gopherbot added this to the Unreleased milestone Aug 9, 2024
@gabyhelp
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gabyhelp commented Aug 9, 2024

Related Issues and Documentation

(Emoji vote if this was helpful or unhelpful; more detailed feedback welcome in this discussion.)

@adonovan
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Given the analysis in #64503 (comment), and the fact the hypothesis (3) is no longer possible due to https://go.dev/cl/549575, hypothesis (1) seems likely: "a curious user or misbehaving client is sending home-made or invalid BundledFixes messages, or modifying the value before returning it to the server". The fact that the the LSP client string is "other" adds a small amount of evidentiary weight.

We should probably downgrade the bug.Report to silently discard the message on the grounds that the client has meddled with it, or, better, report an ordinary error to be handled by the caller.

@adonovan adonovan removed the NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. label Aug 12, 2024
@findleyr findleyr modified the milestones: Unreleased, gopls/v0.17.0 Aug 29, 2024
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