Go version
go version go1.21.4 linux/amd64
Output of go env in your module/workspace:
GO111MODULE=''
GOARCH='amd64'
GOBIN=''
GOCACHE='/home/ncw/.cache/go-build'
GOENV='/home/ncw/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFLAGS=''
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMODCACHE='/home/ncw/go/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/home/ncw/go'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/opt/go/go1.21'
GOSUMDB='sum.golang.org'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/opt/go/go1.21/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.21.4'
GCCGO='gccgo'
GOAMD64='v1'
AR='ar'
CC='gcc'
CXX='g++'
CGO_ENABLED='1'
GOMOD='/dev/null'
GOWORK=''
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
PKG_CONFIG='pkg-config'
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build4276667016=/tmp/go-build -gno-record-gcc-switches'
What did you do?
See: https://go.dev/play/p/UkzjB5-g2Fo
I ran
func main() {
var o bool
var in = "7"
n, err := fmt.Sscanln(in, &o)
fmt.Println(n, err)
fmt.Println(o)
}
What did you see happen?
It produced
1 <nil>
false
Indicating that 1 argument had been successfully parsed as false.
What did you expect to see?
I expected to see this as I don't think "7" is a valid bool.
0 strconv.ParseBool: parsing "7": invalid syntax
false
Or possibly (but inconsistent with strconv.ParseBool)
1 <nil>
true
Comment From: gabyhelp
Related Issues
- fmt: Sscanf accepts invalid boolean values #43306
- fmt: mishandling of FALSE in Scanf #2922 (closed)
- fmt: Scanf rejects \r\n at end of line on Windows #51346 (closed)
- fmt: Sscanf handles spaces and \n inconsistently #8515 (closed)
- Boolean literal are allowed to be used as variable names #36627 (closed)
(Emoji vote if this was helpful or unhelpful; more detailed feedback welcome in this discussion.)
Comment From: ncw
Good bot :-) I think this is a dupe of #43306 which I managed to miss in my searching so I'll close this.