cmd/compile: internal compiler error: panic: runtime error: invalid memory address or nil pointer dereference

[karalef]

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

$ go version
go version go1.19.1 linux/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=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/home/dmitry/.cache/go-build"
GOENV="/home/dmitry/.config/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/home/dmitry/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/home/dmitry/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/lib/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/lib/go/pkg/tool/linux_amd64"
GOVCS=""
GOVERSION="go1.19.1"
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-build2248762176=/tmp/go-build -gno-record-gcc-switches"

What did you do?

I was writing a base for query router, but when using a context based on both generic and embedded fields, I was getting an error.

Short program showing issue

package main

func main() {
	Handle(QueryContext[int]{})
}

type BaseContext struct{}

func (BaseContext) Logger() *struct{} {
	return nil
}

type QueryContext[T any] struct {
	BaseContext
}

type Context interface {
	Logger() *struct{}
}

func Handle[Ctx Context](ctx Ctx) {
	ctx.Logger()
}

What did you expect to see?

Сompiled program

What did you see instead?

internal compiler error: panic: runtime error: invalid memory address or nil pointer dereference

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

[seankhliao]

fixed on tip.