syntax error highlighting not working

[sding3]

What did you do? (required: The issue will be closed when not provided)

Introduce syntax error:

package main

func main() {
    syntaxerror = 123 
}

What did you expect to happen?

Syntax error get highlighted.

What happened instead?

Syntax error did not get highlighted.

Debug output:

{"jsonrpc":"2.0","method":"textDocument/publishDiagnostics","params":{"uri":"file:///tmp/test.go","version":24,"diagnostics":[{"range":{"start":{"line":2,"character":5},"end":{"line":2,"character":9}},"severity":1,"code":"DuplicateDecl","codeDescription":{"href":"https://pkg.go.dev/golang.org/x/tools/internal/typesinternal#DuplicateDecl"},"source":"compiler","message":"main redeclared in this block","relatedInformation":[{"location":{"uri":"file:///tmp/foo.go","range":{"start":{"line":4,"character":5},"end":{"line":4,"character":9}}},"message":"other declaration of main"}]},{"range":{"start":{"line":3,"character":1},"end":{"line":3,"character":12}},"severity":1,"code":"UndeclaredName","codeDescription":{"href":"https://pkg.go.dev/golang.org/x/tools/internal/typesinternal#UndeclaredName"},"source":"compiler","message":"undeclared name: syntaxerror"}]}}

Also I get errors when trying to GoUpdateBinaries. I don't know if this is related. The error is:

vim-go: Error installing golang.org/x/tools/gopls@latest: golang.org/x/exp/constraints
vim-go: golang.org/x/exp/maps
vim-go: # golang.org/x/exp/constraints
vim-go: /home/shang/go/pkg/mod/golang.org/x/[email protected]/constraints/constraints.go:13:2: embedding interface 
element ~int|~int8|~int16|~int32|~int64 requires go1.18 or later (-lang was set to go1.16; check go.mod)
vim-go: /home/shang/go/pkg/mod/golang.org/x/[email protected]/constraints/constraints.go:20:2: embedding interface 
<...truncated...>

Configuration (MUST fill this out):

Default

vim-go version:

v1.26

vimrc you used to reproduce:

vimrc

let g:go_fmt_command = "goimports"
let g:go_debug=['lsp']

Vim version (first three lines from :version):

VIM - Vi IMproved 8.2 (2019 Dec 12, compiled Mar 30 2022 23:54:07)
Included patches: 1-4651
Compiled by Arch Linux

Go version (go version):

go version go1.19.3 linux/amd64

Go environment

go env Output:

GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/home/shang/.cache/go-build"
GOENV="/home/shang/.config/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/home/shang/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/home/shang/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
GOVCS=""
GOVERSION="go1.19.3"
GCCGO="gccgo"
GOAMD64="v1"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/dev/null"
GOWORK=""
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 -Wl,--no-gc-sections -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build109430886=/tmp/go-build -gno-record-gcc-switches"

gopls version

gopls version Output:

golang.org/x/tools/gopls v0.10.1
    golang.org/x/tools/[email protected] h1:JoHe17pdZ8Vsa24/GUO8iTVTKPh0EOBiWpPop7XJybI=

[bhcleek]

See :help g:go_diagnostics_level.

The error you're seeing on : GoUpdateBinaries is unrelated. To deal with that, see #3446 and #3449. If you'll update to the latest master revision of vim-go, you will be able to update the tools.

[sding3]

Great - thanks for the help!