math: uint assignment overflow but compile doesn't report error. #23163
Description
Please answer these questions before submitting your issue. Thanks!
What version of Go are you using (go version)?
go version go1.8.3 windows/amd64
Does this issue reproduce with the latest release?
No
What operating system and processor architecture are you using (go env)?
set GOARCH=amd64
set GOBIN=
set GOEXE=.exe
set GOHOSTARCH=amd64
set GOHOSTOS=windows
set GOOS=windows
set GOPATH=E:\dev\gopath
set GORACE=
set GOROOT=E:\Go
set GOTOOLDIR=E:\Go\pkg\tool\windows_amd64
set GCCGO=gccgo
set CC=gcc
set GOGCCFLAGS=-m64 -mthreads -fmessage-length=0
set CXX=g++
set CGO_ENABLED=1
set PKG_CONFIG=pkg-config
set CGO_CFLAGS=-g -O2
set CGO_CPPFLAGS=
set CGO_CXXFLAGS=-g -O2
set CGO_FFLAGS=-g -O2
set CGO_LDFLAGS=-g -O2
What did you do?
Assign a uint64 number to type of uint, it can build and run.
package main
import (
"fmt"
"math"
"runtime"
)
func main() {
var a uint = math.MaxUint64
fmt.Println("Hello, playground", a, runtime.Version())
}
What did you expect to see?
Build error with messge: constant 18446744073709551615 overflows uint
What did you see instead?
Hello, playground 18446744073709551615 go1.8.3