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x/tools/cmd/gopls: badly formatted diagnostics returned #31494

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myitcv opened this issue Apr 16, 2019 · 1 comment
Closed

x/tools/cmd/gopls: badly formatted diagnostics returned #31494

myitcv opened this issue Apr 16, 2019 · 1 comment
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FrozenDueToAge gopls Issues related to the Go language server, gopls. NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.
Milestone
Unreleased

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@myitcv
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myitcv commented Apr 16, 2019

What version of Go are you using (go version)?

$ go version
go version go1.12.3 linux/amd64
$ go list -m golang.org/x/tools
golang.org/x/tools v0.0.0-20190406165526-0d5674b3111a

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (go env)?

go env Output
$ go env
GOARCH="amd64"
GOBIN="/home/myitcv/gostuff/src/github.com/myitcv/govim/cmd/govim/.bin"
GOCACHE="/home/myitcv/.cache/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/myitcv/gostuff"
GOPROXY=""
GORACE=""
GOROOT="/home/myitcv/gos"
GOTMPDIR=""
GOTOOLDIR="/home/myitcv/gos/pkg/tool/linux_amd64"
GCCGO="gccgo"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/home/myitcv/gostuff/src/github.com/myitcv/govim/go.mod"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build243250984=/tmp/go-build -gno-record-gcc-switches"

What did you do?

The following code:

package main

import "fmt"

func main() {
	fmt.Printf("This is a test %v\n")
}

generates the following diagnostic:

PublishDiagnostics callback: &protocol.PublishDiagnosticsParams{
    URI:         "file:///tmp/go-test-script954767825/script-quickfix/main.go",
    Version:     0,
    Diagnostics: {
        {
            Range: protocol.Range{
                Start: protocol.Position{Line:5, Character:1},
                End:   protocol.Position{Line:5, Character:1},
            },
            Severity:           2,
            Code:               nil,
            Source:             "printf",
            Message:            "Printf format %!v(MISSING) reads arg #1, but call has 0 args",
            Tags:               nil,
            RelatedInformation: nil,
        },
    },
}

What did you expect to see?

The well formatted message:

Printf format "This is a test %v\n" reads arg #1, but call has 0 args

What did you see instead?

The badly formatted message:

Printf format %!v(MISSING) reads arg #1, but call has 0 args

cc @stamblerre @ianthehat
@myitcv myitcv 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. labels Apr 16, 2019
@gopherbot gopherbot added this to the Unreleased milestone Apr 16, 2019
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Change https://golang.org/cl/172398 mentions this issue: internal/lsp: fix badly formatted error messages from go vet

@myitcv myitcv mentioned this issue Apr 16, 2019
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FrozenDueToAge gopls Issues related to the Go language server, gopls. NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.
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