Error using snippets with "var" as default name

[RomanKornev]

What version of Go, VS Code & VS Code Go extension are you using?

• Run go version to get version of Go
  • go version go1.15.5 linux/amd64
• Run gopls -v version to get version of Gopls if you are using the language server.
  • golang.org/x/tools/gopls v0.5.3
• Run code -v or code-insiders -v to get version of VS Code or VS Code Insiders
  • 1.51.1 x64
• Check your installed extensions to get the version of the VS Code Go extension
  • 0.19.0
• Run go env to get the go development environment details
  • GO111MODULE=""
    GOARCH="amd64"
    GOBIN=""
    GOCACHE="/home/df/.cache/go-build"
    GOENV="/home/df/.config/go/env"
    GOEXE=""
    GOFLAGS=""
    GOHOSTARCH="amd64"
    GOHOSTOS="linux"
    GOINSECURE=""
    GOMODCACHE="/home/df/go/pkg/mod"
    GONOPROXY=""
    GONOSUMDB=""
    GOOS="linux"
    GOPATH="/home/df/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"
    GCCGO="gccgo"
    AR="ar"
    CC="gcc"
    CXX="g++"
    CGO_ENABLED="1"
    GOMOD="/c/Python/Go/Crypto/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-build490426795=/tmp/go-build -gno-record-gcc-switches"

Share the Go related settings you have added/edited

    // #region GO
    "go.useLanguageServer": true,
    "go.languageServerFlags": [
        "-rpc.trace"
    ],
    "go.languageServerExperimentalFeatures": {
        "diagnostics": true,
        "documentLink": true,
        "format": true
    },
    "[go]": {
        "editor.insertSpaces": false,
        "editor.formatOnSave": true,
        "editor.codeActionsOnSave": {
            "source.organizeImports": true
        },
        // "editor.snippetSuggestions": "none"
    },
    "[go.mod]": {
        "editor.formatOnSave": true,
        "editor.codeActionsOnSave": {
            "source.organizeImports": true
        },
    },
    "gopls": {
        "completeUnimported": true,
        "deepCompletion": true,
        "usePlaceholders": true,
        "staticcheck":true
    },
    // #endregion GO

Describe the bug

Some snippets with "var" as the default name produce Error: "expected 1 expression"

Steps to reproduce the behavior:

1. Type forr and iterate over a slice using a default "var" name
2. Error: "expected 1 expression"
3. Change name of "var" to any other name - error is gone

Screenshots or recordings

[gopherbot]

Change https://golang.org/cl/273746 mentions this issue: snippets: error using snippets with "var" as default name

[gopherbot]

Change https://golang.org/cl/276213 mentions this issue: [release] snippets: avoid using "var" as default name in snippets