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x/tools/gopls: show errors on all files with import cycles #52904

findleyr opened this issue May 13, 2022 · 1 comment

x/tools/gopls: show errors on all files with import cycles #52904

findleyr opened this issue May 13, 2022 · 1 comment
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@findleyr findleyr commented May 13, 2022

Investigating failures of gopls/internal/regtest/diagnostics.TestResolveImportCycles with @matloob, we discovered that gopls is not locating import cycle errors on all packages involved in an import cycle.

In go list json output, the Error field is only set for one package, but the rest can be inferred from the cycle information.

@gopherbot gopherbot added Tools gopls labels May 13, 2022
@gopherbot gopherbot added this to the Unreleased milestone May 13, 2022
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@gopherbot gopherbot commented May 13, 2022

Change mentions this issue: internal/lsp/regtest: make TestResolveImportCycle robust to error order

gopherbot pushed a commit to golang/tools that referenced this issue May 13, 2022
In JSON output, the Go command was only setting the Error field for one
package involved in an import cycle. As a result, TestResolveImportCycle
was dependent on the chosen package, causing flakes when the chosen
package is not deterministic.

Arguably this behavior should be fixed, both in the go command and in
gopls, but for now make the test resilient to choice by asserting on any
of the possible errors.

Add a new AnyOf expectation to support this type of assertion and tweak the
test output formatting. Also update the test to eagerly fail once the
didOpen notification has been fully processed, so that we don't have to
wait for the assertion timeout.

Updates golang/go#52904

Change-Id: Ic209d8fdcb7308c041b287a8f122c47e96d29a96
Reviewed-by: Michael Matloob <>
Run-TryBot: Robert Findley <>
TryBot-Result: Gopher Robot <>
gopls-CI: kokoro <>
@findleyr findleyr removed this from the Unreleased milestone May 17, 2022
@findleyr findleyr added this to the gopls/later milestone May 17, 2022
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