Weird SA1019 false positive with generic method and another deprecated

• The output of 'staticcheck -version' → staticcheck 2026.2.1 (0.8.1)

• The output of 'staticcheck -debug.version' (it is fine if this command fails)
  复制

  staticcheck 2026.2.1 (0.8.1)
  
  Compiled with Go version: go1.27.1
  Main module:
          honnef.co/go/[email protected] (sum: h1:+JKf3xJ1ni4CwrhVg4/pqsfPGP6vNAXcKbMXJodYx3w=)
  Dependencies:
          github.com/BurntSushi/[email protected] (sum: h1:pxW6RcqyfI9/kWtOwnv/G+AzdKuy2ZrqINhenH4HyNs=)
          golang.org/x/exp/[email protected] (sum: h1:1P7xPZEwZMoBoz0Yze5Nx2/4pxj6nw9ZqHWXqP0iRgQ=)
          golang.org/x/[email protected] (sum: h1:Ww1D637e6Pg+Zb2KrWfHQUnH2dQRLBQyAtpr/haaJeM=)
          golang.org/x/[email protected] (sum: h1:e0PTpb7pjO8GAtTs2dQ6jYa5BWYlMuX047Dco/pItO4=)
          golang.org/x/[email protected] (sum: h1:vSv/HN1q9eoPD7lMyJYVJ/GPYnqtqu6adMxUmrxOB78=)

• The output of 'go version' → go version go1.27.1 linux/amd64

• The output of 'go env'
  复制

  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='/go/bin'
  GOCACHE='/root/.cache/go-build'
  GOCACHEPROG=''
  GODEBUG=''
  GOENV='/root/.config/go/env'
  GOEXE=''
  GOEXPERIMENT=''
  GOFIPS140='off'
  GOFLAGS=''
  GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build151895466=/tmp/go-build -gno-record-gcc-switches'
  GOHOSTARCH='amd64'
  GOHOSTOS='linux'
  GOINSECURE=''
  GOMOD='/root/test/go.mod'
  GOMODCACHE='/go/pkg/mod'
  GONOPROXY=''
  GONOSUMDB=''
  GOOS='linux'
  GOPACKAGESDRIVER=''
  GOPATH='/go'
  GOPRIVATE=''
  GOPROXY='https://proxy.golang.org,direct'
  GOROOT='/usr/local/go'
  GOSUMDB='sum.golang.org'
  GOTELEMETRY='local'
  GOTELEMETRYDIR='/root/.config/go/telemetry'
  GOTMPDIR=''
  GOTOOLCHAIN='local'
  GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
  GOVCS=''
  GOVERSION='go1.27.1'
  GOWORK=''
  PKG_CONFIG='pkg-config'

• Exactly which commands you ran (in a golang docker fresh image):

root@22a3c9086eb2:~# mkdir test
root@22a3c9086eb2:~# cd test
root@22a3c9086eb2:~/test# cat <<EOF > main_test.go
package main_test

import (
        "testing"

        "github.com/maxatome/go-testdeep/td"
)       

type X struct {
        A []byte
}

func TestX(t *testing.T) {
        assert := td.Assert(t)

        assert.Cmp(
                X{A: []byte("pipo bingo")},
                X{A: assert.AT[[]byte](td.Contains("bingo"))})
}
EOF
root@22a3c9086eb2:~/test# go mod init test/pipo
go: creating new go.mod: module test/pipo
go: to add module requirements and sums:
        go mod tidy
root@22a3c9086eb2:~/test# go mod tidy
go: finding module for package github.com/maxatome/go-testdeep/td
go: downloading github.com/maxatome/go-testdeep v1.16.0
go: found github.com/maxatome/go-testdeep/td in github.com/maxatome/go-testdeep v1.16.0
root@22a3c9086eb2:~/test# go test .
ok      test/pipo       0.002s
root@2b3057ad93ce:~/test# go install honnef.co/go/tools/cmd/[email protected]
go: downloading honnef.co/go/tools v0.8.1
go: downloading golang.org/x/tools v0.44.1-0.20260420230617-19499e7caabc
go: downloading golang.org/x/exp/typeparams v0.0.0-20231108232855-2478ac86f678
go: downloading golang.org/x/sync v0.20.0
go: downloading github.com/BurntSushi/toml v1.4.1-0.20240526193622-a339e1f7089c
go: downloading golang.org/x/mod v0.35.0
go: downloading golang.org/x/exp v0.0.0-20231110203233-9a3e6036ecaa
root@2b3057ad93ce:~/test# staticcheck -version 
staticcheck 2026.2.1 (0.8.1)

• Output of the command and what's wrong with the output:

root@2b3057ad93ce:~/test# staticcheck ./...
main_test.go:18:22: (*github.com/maxatome/go-testdeep/td.T).AT is deprecated: RunT has been superseded by [T.Run] method. It is kept for compatibility.  (SA1019)

(*github.com/maxatome/go-testdeep/td.T).AT is not deprecated but (*github.com/maxatome/go-testdeep/td.T).RunT is. However neither main_test.go nor T.AT use T.RunT, that is why it is weird…