internal compiler error: bad type for ... argument

[mpkondrashin]

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

$ go version
go version go1.16.3 darwin/amd64

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
GO111MODULE="off"
GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/michael/Library/Caches/go-build"
GOENV="/Users/michael/Library/Application Support/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOINSECURE=""
GOMODCACHE="/Users/michael/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="darwin"
GOPATH="/Users/michael/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/local/Cellar/go/1.16.3/libexec"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/Cellar/go/1.16.3/libexec/pkg/tool/darwin_amd64"
GOVCS=""
GOVERSION="go1.16.3"
GCCGO="gccgo"
AR="ar"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -arch x86_64 -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/ty/8m48h3sj26jfhx_6q6bty5l80000gn/T/go-build4218180710=/tmp/go-build -gno-record-gcc-switches -fno-common"

What did you do?

Following code:

package main

func TwoArgs(a, b int) {
}

func main() {
	var actions [2]int
	TwoArgs(actions...)
}

Produces internal compiles error

What did you expect to see?

I assume that "actions..." can be used instead of two arguments provided that actions is two element array.

What did you see instead?

./bug.go:8:9: internal compiler error: bad type for ... argument: [2]int

Please file a bug report including a short program that triggers the error.
https://golang.org/issue/new

[cuonglm]

Duplicated of #45913

[ALTree]

Thanks for reporting this. As Cuong pointed out, this is a dup of #45913, which is fixed on tip (fix will be included in go1.17). Closing here.