Go version
go version go1.27.0 linux/amd64
Output of go env in your module/workspace:
AR='ar'
CC='gcc'
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_ENABLED='1'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
CXX='g++'
GCCGO='gccgo'
GO111MODULE=''
GOAMD64='v1'
GOARCH='amd64'
GOAUTH='netrc'
GOBIN='/home/dan/go/bin'
GOCACHE='/home/dan/.cache/go-build'
GOCACHEPROG=''
GODEBUG=''
GOENV='/home/dan/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFIPS140='off'
GOFLAGS=''
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build753068446=/tmp/go-build -gno-record-gcc-switches'
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMOD='/home/dan/go/src/github.com/danlock/test/go.mod'
GOMODCACHE='/home/dan/go/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPACKAGESDRIVER=''
GOPATH='/home/dan/go'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/home/dan/go/pkg/mod/golang.org/toolchain@v0.0.1-go1.27.0.linux-amd64'
GOSUMDB='sum.golang.org'
GOTELEMETRY='local'
GOTELEMETRYDIR='/home/dan/.config/go/telemetry'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/home/dan/go/pkg/mod/golang.org/toolchain@v0.0.1-go1.27.0.linux-amd64/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.27.0'
GOWORK=''
PKG_CONFIG='pkg-config'
What did you do?
json.Marshal on a value like Infinity into a float returns an invalid value on 1.27, and it used to return a float64 on 1.26.3.
What did you see happen?
https://go.dev/play/p/r6Y0R1ZLhOe
What did you expect to see?
https://go.dev/play/p/r6Y0R1ZLhOe?v=goprev
This broke a few tests. Filtering on the new value worked for me but it seemed like a breaking change due to the new encoding/json/v2 library. I expected Go to continue accurately reporting the specific UnsupportedValue in the json.UnsupportedValueError.Value.
Go version
go version go1.27.0 linux/amd64
Output of
go envin your module/workspace:What did you do?
json.Marshal on a value like Infinity into a float returns an invalid value on 1.27, and it used to return a float64 on 1.26.3.
What did you see happen?
https://go.dev/play/p/r6Y0R1ZLhOe
What did you expect to see?
https://go.dev/play/p/r6Y0R1ZLhOe?v=goprev
This broke a few tests. Filtering on the new value worked for me but it seemed like a breaking change due to the new encoding/json/v2 library. I expected Go to continue accurately reporting the specific UnsupportedValue in the json.UnsupportedValueError.Value.