time: ParseInLocation does not adjust timezone offset when seconds are not explicitly set #53919
Closed as not planned
Description
What version of Go are you using (go version)?
$ go version go version go1.18.4 darwin/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="on" GOARCH="amd64" GOBIN="" GOCACHE="/Users/mark/Library/Caches/go-build" GOENV="/Users/mark/Library/Application Support/go/env" GOEXE="" GOEXPERIMENT="" GOFLAGS="-mod=mod" GOHOSTARCH="amd64" GOHOSTOS="darwin" GOINSECURE="" GOMODCACHE="/Users/mark/go/pkg/mod" GONOPROXY="github.com/flypay/*,github.com/faetools/*" GONOSUMDB="github.com/flypay/*,github.com/faetools/*" GOOS="darwin" GOPATH="/Users/mark/go" GOPRIVATE="github.com/flypay/*,github.com/faetools/*" GOPROXY="https://proxy.golang.org,direct" GOROOT="/usr/local/Cellar/go/1.18.4/libexec" GOSUMDB="sum.golang.org" GOTMPDIR="" GOTOOLDIR="/usr/local/Cellar/go/1.18.4/libexec/pkg/tool/darwin_amd64" GOVCS="" GOVERSION="go1.18.4" GCCGO="gccgo" GOAMD64="v1" AR="ar" CC="clang" CXX="clang++" CGO_ENABLED="1" GOMOD="/Users/mark/go/src/github.com/golang/go/src/go.mod" 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 -arch x86_64 -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/rw/2cbtm9v95bz86c0ktyjwj2_80000gn/T/go-build2898766309=/tmp/go-build -gno-record-gcc-switches -fno-common"
What did you do?
I ran into an issue where a time.Time object was seconds off after having been converted into a string using Format with RFC3339 and back using ParseInLocation.
https://go.dev/play/p/5t8wa3b_ahv
What did you expect to see?
The test above succeeding, i.e. when I explicitly state my desired location that go is smart enough to adjust the seconds.
What did you see instead?
The test failing.
This is because the parsed time zone differs mere seconds from the desired time zone and RFC3339 expresses a time zone only in hours and minutes.