Build failure in app using slog-loki v3.6.0

[5-lagu]

After running go get -u today, I'm now getting the followin error when trying to build:

github.com/grafana/loki-client-go/loki
../../go/pkg/mod/github.com/grafana/loki-client-go@v0.0.0-20251015150631-c42bbddc310a/loki/client.go:288:20: cannot range over lbls (variable of struct type labels.Labels)
../../go/pkg/mod/github.com/grafana/loki-client-go@v0.0.0-20251015150631-c42bbddc310a/loki/client.go:289:13: cannot index lbls (variable of struct type labels.Labels)
../../go/pkg/mod/github.com/grafana/loki-client-go@v0.0.0-20251015150631-c42bbddc310a/loki/client.go:292:60: cannot index lbls (variable of struct type labels.Labels)

This dependancy was upgraded:

go: upgraded github.com/grafana/loki-client-go v0.0.0-20240913122146-e119d400c3a5 => v0.0.0-20251015150631-c42bbddc310a

This package seems both experimental and I'm not sure what happened there... Any tips?

[samber]

please upgrade to v3.7.0

i'm closing this issue since i think it is solve but feel free to open it again in case we need to look deeper

also, please send me you go.mod

[5-lagu]

I'm getting the same error. The error in loki/cilent.go is weird, bechause the "lbls" variable, afaik, is an array of labels that should be both "rangeable" and indexable, but I'm probably missing something. I don't know that codebase at all.

Here's my go.mod:

module github.com/5-lagu/rd-adra-integrator

go 1.25

require (
	github.com/grafana/loki-client-go v0.0.0-20251015150631-c42bbddc310a
	github.com/integrii/flaggy v1.8.0
	github.com/joho/godotenv v1.5.1
	github.com/pkg/sftp v1.13.10
	github.com/samber/slog-loki/v3 v3.7.0
	github.com/samber/slog-multi v1.7.0
	golang.org/x/crypto v0.47.0
)

require (
	github.com/beorn7/perks v1.0.1 // indirect
	github.com/cespare/xxhash/v2 v2.3.0 // indirect
	github.com/dennwc/varint v1.0.0 // indirect
	github.com/go-kit/kit v0.13.0 // indirect
	github.com/go-kit/log v0.2.1 // indirect
	github.com/go-logfmt/logfmt v0.6.1 // indirect
	github.com/gogo/protobuf v1.3.2 // indirect
	github.com/golang-jwt/jwt/v5 v5.3.0 // indirect
	github.com/golang/snappy v1.0.0 // indirect
	github.com/google/uuid v1.6.0 // indirect
	github.com/grafana/loki/pkg/push v0.0.0-20260123003234-a009e9707aed // indirect
	github.com/grafana/regexp v0.0.0-20250905093917-f7b3be9d1853 // indirect
	github.com/jpillora/backoff v1.0.0 // indirect
	github.com/json-iterator/go v1.1.12 // indirect
	github.com/kr/fs v0.1.0 // indirect
	github.com/mitchellh/mapstructure v1.5.0 // indirect
	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
	github.com/modern-go/reflect2 v1.0.3-0.20250322232337-35a7c28c31ee // indirect
	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
	github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f // indirect
	github.com/pkg/errors v0.9.1 // indirect
	github.com/prometheus/client_golang v1.23.2 // indirect
	github.com/prometheus/client_model v0.6.2 // indirect
	github.com/prometheus/common v0.67.5 // indirect
	github.com/prometheus/procfs v0.19.2 // indirect
	github.com/prometheus/prometheus v0.309.1 // indirect
	github.com/samber/lo v1.52.0 // indirect
	github.com/samber/slog-common v0.19.0 // indirect
	go.uber.org/atomic v1.11.0 // indirect
	go.yaml.in/yaml/v2 v2.4.3 // indirect
	golang.org/x/net v0.49.0 // indirect
	golang.org/x/oauth2 v0.34.0 // indirect
	golang.org/x/sys v0.40.0 // indirect
	golang.org/x/text v0.33.0 // indirect
	google.golang.org/genproto/googleapis/rpc v0.0.0-20260122232226-8e98ce8d340d // indirect
	google.golang.org/grpc v1.78.0 // indirect
	google.golang.org/protobuf v1.36.11 // indirect
	gopkg.in/yaml.v2 v2.4.0 // indirect
)

[5-lagu]

Here's my previous go.mod that works fine. Maybe it's something with go v1.25...

module github.com/5-lagu/rd-adra-integrator

go 1.24.2

require (
	github.com/grafana/loki-client-go v0.0.0-20240913122146-e119d400c3a5
	github.com/integrii/flaggy v1.5.2
	github.com/joho/godotenv v1.5.1
	github.com/pkg/sftp v1.13.9
	github.com/samber/slog-loki/v3 v3.5.4
	github.com/samber/slog-multi v1.4.0
	golang.org/x/crypto v0.37.0
)

require (
	github.com/beorn7/perks v1.0.1 // indirect
	github.com/cespare/xxhash/v2 v2.3.0 // indirect
	github.com/dennwc/varint v1.0.0 // indirect
	github.com/go-kit/kit v0.13.0 // indirect
	github.com/go-kit/log v0.2.1 // indirect
	github.com/go-logfmt/logfmt v0.6.0 // indirect
	github.com/gogo/protobuf v1.3.2 // indirect
	github.com/golang/snappy v1.0.0 // indirect
	github.com/grafana/loki/pkg/push v0.0.0-20250424061422-50b12efa5e29 // indirect
	github.com/grafana/regexp v0.0.0-20240518133315-a468a5bfb3bc // indirect
	github.com/jpillora/backoff v1.0.0 // indirect
	github.com/json-iterator/go v1.1.12 // indirect
	github.com/kr/fs v0.1.0 // indirect
	github.com/mitchellh/mapstructure v1.5.0 // indirect
	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
	github.com/modern-go/reflect2 v1.0.2 // indirect
	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
	github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f // indirect
	github.com/pkg/errors v0.9.1 // indirect
	github.com/prometheus/client_golang v1.22.0 // indirect
	github.com/prometheus/client_model v0.6.2 // indirect
	github.com/prometheus/common v0.63.0 // indirect
	github.com/prometheus/procfs v0.16.1 // indirect
	github.com/prometheus/prometheus v0.303.0 // indirect
	github.com/samber/lo v1.49.1 // indirect
	github.com/samber/slog-common v0.18.1 // indirect
	go.uber.org/atomic v1.11.0 // indirect
	golang.org/x/net v0.39.0 // indirect
	golang.org/x/oauth2 v0.29.0 // indirect
	golang.org/x/sys v0.32.0 // indirect
	golang.org/x/text v0.24.0 // indirect
	google.golang.org/genproto/googleapis/rpc v0.0.0-20250422160041-2d3770c4ea7f // indirect
	google.golang.org/grpc v1.72.0 // indirect
	google.golang.org/protobuf v1.36.6 // indirect
	gopkg.in/yaml.v2 v2.4.0 // indirect
)

My system is:
❯ go version
go version go1.25.6 X:nodwarf5 linux/amd64

❯ uname -a
Linux elitebook-fedora 6.18.5-200.fc43.x86_64 #1 SMP PREEMPT_DYNAMIC Sun Jan 11 17:09:32 UTC 2026 x86_64 GNU/Linux

[5-lagu]

Was anyone else able to reproduce this? I tried a go get -u today, and I'm still getting the build errors loki/client.go... Not sure if that project is still active. I tried pulling down the loki-client-go repo but I can't reproduce the error there... the lbls var is a map and should be loopable with range. The LSP is also not complaing there, only in my small demo app that uses slog-loki and loki-client-go as a dependency.

[samber]

Hum, I cannot reproduce your error...