Closed
Description
Go version
go version go1.25rc2 darwin/arm64
Output of go env in your module/workspace:
AR='ar'
CC='clang'
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_ENABLED='1'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
CXX='clang++'
GCCGO='gccgo'
GO111MODULE='on'
GOARCH='arm64'
GOARM64='v8.0'
GOAUTH='netrc'
GOBIN='***'
GOCACHE='***'
GOCACHEPROG=''
GODEBUG=''
GOENV='***'
GOEXE=''
GOEXPERIMENT=''
GOFIPS140='off'
GOFLAGS=''
GOGCCFLAGS='-fPIC -arch arm64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -ffile-prefix-map=/var/folders/6c/_j2w7w9j23db85y594fl2xmc0000gn/T/go-build3349238838=/tmp/go-build -gno-record-gcc-switches -fno-common'
GOHOSTARCH='arm64'
GOHOSTOS='darwin'
GOINSECURE=''
GOMOD='***'
GOMODCACHE='***'
GONOPROXY='***'
GONOSUMDB='***'
GOOS='darwin'
GOPATH='***'
GOPRIVATE='***'
GOPROXY='***'
GOROOT='***'
GOSUMDB='sum.golang.google.cn'
GOTELEMETRY='local'
GOTELEMETRYDIR='***'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='***'
GOVCS=''
GOVERSION='go1.25rc2'
GOWORK=''
PKG_CONFIG='pkg-config'What did you do?
package main
import (
"reflect"
"unsafe"
)
var stringTypePointer = reflect.ValueOf(reflect.TypeFor[string]()).Pointer()
func main() {
t := reflect.TypeOf(0)
(*[2]uintptr)(unsafe.Pointer(&t))[1] = stringTypePointer
println(t.String())
}What did you see happen?
Without optimization:
>> go run -gcflags='all=-l -N' main.go
string
Default:
>> go run main.go
int
What did you expect to see?
string is correct.