cmd/compile: failed to compile some recursive generic type #54535
Description
What version of Go are you using (go version)?
$ go version go version devel go1.20-a719a78c1b Fri Aug 19 00:29:18 2022 +0000 darwin/arm64
Does this issue reproduce with the latest release?
tip only
What operating system and processor architecture are you using (go env)?
go env Output
$ go env GO111MODULE="" GOARCH="arm64" GOBIN="" GOCACHE="/Users/mitsuoheijo/Library/Caches/go-build" GOENV="/Users/mitsuoheijo/Library/Application Support/go/env" GOEXE="" GOEXPERIMENT="" GOFLAGS="" GOHOSTARCH="arm64" GOHOSTOS="darwin" GOINSECURE="" GOMODCACHE="/Users/mitsuoheijo/go/pkg/mod" GONOPROXY="" GONOSUMDB="" GOOS="darwin" GOPATH="/Users/mitsuoheijo/go" GOPRIVATE="" GOPROXY="https://proxy.golang.org,direct" GOROOT="/Users/mitsuoheijo/ghq/github.com/golang/go" GOSUMDB="sum.golang.org" GOTMPDIR="" GOTOOLDIR="/Users/mitsuoheijo/ghq/github.com/golang/go/pkg/tool/darwin_arm64" GOVCS="" GOVERSION="devel go1.20-a719a78c1b Fri Aug 19 00:29:18 2022 +0000" GCCGO="gccgo" AR="ar" CC="clang" CXX="clang++" CGO_ENABLED="1" GOMOD="/Users/mitsuoheijo/ghq/github.com/johejo/sandbox/go.mod" 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 -arch arm64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/bq/s3vkkxm17jq79lx5qy3856zh0000gn/T/go-build3085638013=/tmp/go-build -gno-record-gcc-switches -fno-common"
What did you do?
package main
type node[T any] struct {
items items[T]
children items[*node[T]]
}
func (n *node[T]) f(i int, j int) bool {
if len(n.children[i].items) < j {
return false
}
return true
}
type items[T any] []T
func main() {
_ = node[int]{}
println("hello")
}What did you expect to see?
$ go run .
hello
What did you see instead?
$ gotip run .
# github.com/johejo/sandbox
./main.go:9:22: n.children[i].items undefined (type go.shape.*uint8 has no field or method items)
This might be some regression.
I found this problem while using google/btree.
https://github.com/google/btree