encoding/json: include field name in error for decoding unquoted number into",string" tag

[kokizzu]

Go version

all version affected

Output of go env in your module/workspace:

GO111MODULE=''
GOARCH='amd64'
GOBIN=''
GOCACHE='/home/asd/.cache/go-build'
GOENV='/home/asd/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFLAGS=''
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMODCACHE='/home/asd/go/pkg/mod'
GOOS='linux'
GOPATH='/home/asd/go'
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/usr/lib/go-1.22'
GOSUMDB='sum.golang.org'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/lib/go-1.22/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.22.3'
GCCGO='gccgo'
GOAMD64='v1'
AR='ar'
CC='gcc'
CXX='g++'
CGO_ENABLED='1'
GOMOD='/tmp/a/go.mod'
GOWORK='off'
CGO_CFLAGS='-Wno-return-local-addr'
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-build2911848713=/tmp/go-build -gno-record-gcc-switches'

What did you do?

try unmarshalling json quoted with int, with and without ",string", all combination only works

• quoted number - with ,string = works
• unquoted number - with , string = doesnt work
• quoted number - without ,string = doesnt work
• unquoted number - without ,string = works

this is quite annoying if there's bunch of fields in the struct (eg. 24+) and the error super unclear json: invalid use of ,string struct tag, trying to unmarshal unquoted value into uint64, which field?

What did you see happen?

just json: invalid use of ,string struct tag, trying to unmarshal unquoted value into uint64

What did you expect to see?

either clearer error message showing which field like: json: invalid use of ,string struct tag, trying to unmarshal unquoted value into uint64 field MoneyIDR

or more permissive unmarshalling option that accept both quoted or unquoted number that targets to number field (int64/uint64) so dont have to use js.Number

[seankhliao]

similar to #22816