text/template: break/continue require no whitespace around them

[JRaspass]

What version of Go are you using (go version)?

$ go version
go version go1.18rc1 linux/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
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/root/.cache/go-build"
GOENV="/root/.config/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
GOVCS=""
GOVERSION="go1.18rc1"
GCCGO="gccgo"
GOAMD64="v1"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/dev/null"
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 -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build149032034=/tmp/go-build -gno-record-gcc-switches"

What did you do?

break/continue in templates require no whitespace around them unlike other keywords.
https://go.dev/play/p/pbmCi6ystSG?v=gotip

What did you expect to see?

{{ range . }}{{ continue }}{{ end }} compiles fine.

What did you see instead?

panic: template: :1: unexpected " " in in {{continue}}

[heschi]

cc @robpike @rsc

[gopherbot]

Change https://go.dev/cl/392615 mentions this issue: text/template/parse: allow space after continue or break

[martinrode]

Shouldn’t this ticket be open until its merged?

Quick test shows it’s not working yet:

https://go.dev/play/p/b9PeeCUue1N

[seankhliao]

It is merged into tip

[martinrode]

How about a backport to the next point release?

[ianlancetaylor]

@gopherbot Please open a backport to 1.18.

These new text/template features are new in the 1.18 release, but they have a oddity in that don't permit whitespace. It's probably worth fixing that in 1.18 so that they people don't have to slightly contort their new code until 1.19 comes out.

[gopherbot]

Backport issue(s) opened: #52878 (for 1.18), #52879 (for 1.19).

Remember to create the cherry-pick CL(s) as soon as the patch is submitted to master, according to https://go.dev/wiki/MinorReleases.

[gopherbot]

Change https://go.dev/cl/406074 mentions this issue: [release-branch.go1.18] text/template/parse: allow space after continue or break