What version of Go are you using (go version)?
$ go version
go version go1.18.1 windows/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
set GO111MODULE=on
set GOARCH=amd64
set GOBIN=
set GOCACHE=C:\Users\ddaa\AppData\Local\go-build
set GOENV=C:\Users\ddaa\AppData\Roaming\go\env
set GOEXE=.exe
set GOEXPERIMENT=
set GOFLAGS=
set GOHOSTARCH=amd64
set GOHOSTOS=windows
set GOINSECURE=
set GOMODCACHE=C:\Users\ddaa\go\pkg\mod
set GONOPROXY=
set GONOSUMDB=
set GOOS=windows
set GOPATH=C:\Users\ddaa\go
set GOPRIVATE=
set GOPROXY=https://goproxy.cn,direct
set GOROOT=C:\Program Files\Go
set GOSUMDB=sum.golang.org
set GOTMPDIR=
set GOTOOLDIR=C:\Program Files\Go\pkg\tool\windows_amd64
set GOVCS=
set GOVERSION=go1.18.1
set GCCGO=gccgo
set GOAMD64=v1
set AR=ar
set CC=gcc
set CXX=g++
set CGO_ENABLED=1
set GOMOD=D:\programing\go\bugReview\go.mod
set GOWORK=
set CGO_CFLAGS=-g -O2
set CGO_CPPFLAGS=
set CGO_CXXFLAGS=-g -O2
set CGO_FFLAGS=-g -O2
set CGO_LDFLAGS=-g -O2
set PKG_CONFIG=pkg-config
set GOGCCFLAGS=-m64 -mthreads -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=C:\Users\ddaa\AppData\Local\Temp\go-build2453048728=/tmp/go-build -gno-rec
ord-gcc-switches
What did you do?
https://go.dev/play/p/RHA6ouED_bP
What did you expect to see?
Compile successfully without reporting a syntax error. (Actually, this code can compile successfully by go1.11.13).
What did you see instead?
./prog.go:14:2: cannot use b (type T2) as type T1 in assignment
Go build failed.
What version of Go are you using (
go version)?Does this issue reproduce with the latest release?
Yes.
What operating system and processor architecture are you using (
go env)?go envOutputWhat did you do?
https://go.dev/play/p/RHA6ouED_bP
What did you expect to see?
Compile successfully without reporting a syntax error. (Actually, this code can compile successfully by go1.11.13).
What did you see instead?
./prog.go:14:2: cannot use b (type T2) as type T1 in assignment
Go build failed.