panic: nil underlying

[karlik8899]

staticcheck 2023.1.3 (v0.4.3)

Compiled with Go version: go1.20.2
Main module:
honnef.co/go/tools@v0.4.3 (sum: h1:o/n5/K5gXqk8Gozvs2cnL0F2S1/g1vcGCAx2vETjITw=)
Dependencies:
github.com/BurntSushi/toml@v1.2.1 (sum: h1:9F2/+DoOYIOksmaJFPw1tGFy1eDnIJXg+UHjuD8lTak=)
golang.org/x/exp/typeparams@v0.0.0-20221208152030-732eee02a75a (sum: h1:Jw5wfR+h9mnIYH+OtGT2im5wV1YGGDora5vTv/aa5bE=)
golang.org/x/mod@v0.7.0 (sum: h1:LapD9S96VoQRhi/GrNTqeBJFrUjs5UHCAtTlgwA5oZA=)
golang.org/x/sys@v0.3.0 (sum: h1:w8ZOecv6NaNa/zC8944JTU3vz4u6Lagfk4RPQxv92NQ=)
golang.org/x/tools@v0.4.1-0.20221208213631-3f74d914ae6d (sum: h1:9ZNWAi4CYhNv60mXGgAncgq7SGc5qa7C8VZV8Tg7Ggs=)

env:

go env

GO111MODULE="auto"

GOARCH="amd64"

GOBIN=""

GOEXE=""

GOEXPERIMENT=""

GOFLAGS=""

GOHOSTARCH="amd64"

GOHOSTOS="linux"

GOINSECURE=""

GOOS="linux"

GOPROXY="https://proxy.golang.org"

GOROOT="/opt/go1.20.2"

GOSUMDB="sum.golang.org"

GOTMPDIR=""

GOTOOLDIR="/opt/go1.20.2/pkg/tool/linux_amd64"

GOVCS=""

GOVERSION="go1.20.2"

GCCGO="gccgo"

GOAMD64="v1"

AR="ar"

CC="gcc"

CXX="g++"

CGO_ENABLED="1"

GOWORK=""

CGO_CFLAGS="-O2 -g"

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 -fdebug-prefix-map=/tmp/go-build1949918171=/tmp/go-build -gno-record-gcc-switches"

I have code:

package main
import (

"fmt"

"github.com/seancfoley/ipaddress-go/ipaddr"

)
type DB struct {

Net *ipaddr.IPAddress

}
func main() {

fmt.Println("XXX")

}

If I run staticcheck it is OK

If I add test file xx_test:

cat main_test.go
package main
import (

"fmt"

"testing"

)
func TestOne(t *testing.T) {

fmt.Println("x")

}

and run a staticcheck, I get:

panic: nil underlying
goroutine 173 [running]:

go/types.(*Named).under(0xc0001378f0)

/opt/go1.20.2/src/go/types/named.go:494 +0x3d8

go/types.under({0xa0b158?, 0xc0001378f0?})

/opt/go1.20.2/src/go/types/type.go:23 +0x45

go/types.computeInterfaceTypeSet(0x0, 0xc0002c4d90?, 0xc000714ff0)

/opt/go1.20.2/src/go/types/typeset.go:273 +0x3f0

go/types.(*TypeParam).iface(0xc000524ae0)

/opt/go1.20.2/src/go/types/typeparam.go:140 +0x1b2

go/types.(*TypeParam).SetConstraint(...)

/opt/go1.20.2/src/go/types/typeparam.go:88

golang.org/x/tools/internal/gcimporter.(*reader).typeParamNames.func1()

/home/karlik/go/pkg/mod/golang.org/x/tools@v0.4.1-0.20221208213631-3f74d914ae6d/internal/gcimporter/ureader_yes.go:688 +0x45

golang.org/x/tools/internal/gcimporter.readUnifiedPackage(0xc00028e100, 0x0, 0xc0004a4150, {0x1, 0x0, {0xc0000e62d0, 0x1}, {0xc0004c087c, 0x5bcf7}, {0xc00025a000, ...}, ...})

/home/karlik/go/pkg/mod/golang.org/x/tools@v0.4.1-0.20221208213631-3f74d914ae6d/internal/gcimporter/ureader_yes.go:117 +0x483

golang.org/x/tools/internal/gcimporter.UImportData(0xa09720?, 0xc000434018?, {0xc00091e001?, 0x67f4bf?, 0x1010000000000?}, {0xc0000e62d0, 0x1})

/home/karlik/go/pkg/mod/golang.org/x/tools@v0.4.1-0.20221208213631-3f74d914ae6d/internal/gcimporter/ureader_yes.go:68 +0x10a

golang.org/x/tools/go/gcexportdata.Read({0xa09720?, 0xc000434018?}, 0x0?, 0x30?, {0xc0000e62d0, 0x1})

/home/karlik/go/pkg/mod/golang.org/x/tools@v0.4.1-0.20221208213631-3f74d914ae6d/go/gcexportdata/gcexportdata.go:134 +0x2b0

honnef.co/go/tools/go/loader.(*program).loadFromExport(0xc000411a60, 0xc0001d7680)

/home/karlik/go/pkg/mod/honnef.co/go/tools@v0.4.3/go/loader/loader.go:199 +0xed

honnef.co/go/tools/go/loader.Load(0xc00020dcc0)

/home/karlik/go/pkg/mod/honnef.co/go/tools@v0.4.3/go/loader/loader.go:168 +0x166

honnef.co/go/tools/lintcmd/runner.(*subrunner).doUncached(0x0?, 0xc000242b40)

/home/karlik/go/pkg/mod/honnef.co/go/tools@v0.4.3/lintcmd/runner/runner.go:694 +0x7f

honnef.co/go/tools/lintcmd/runner.(*subrunner).do(0xc00054e780, {0xa0dae0?, 0xc000242b40})

/home/karlik/go/pkg/mod/honnef.co/go/tools@v0.4.3/lintcmd/runner/runner.go:577 +0x94e

honnef.co/go/tools/lintcmd/runner.(*Runner).Run.func2({0xa0dae0?, 0xc000242b40?})

/home/karlik/go/pkg/mod/honnef.co/go/tools@v0.4.3/lintcmd/runner/runner.go:1268 +0x30

honnef.co/go/tools/lintcmd/runner.genericHandle({0xa0dae0?, 0xc000242b40}, {0xa0dae0?, 0xc000131200?}, 0x0?, 0xc0001ea190, 0xc0004116c0)

/home/karlik/go/pkg/mod/honnef.co/go/tools@v0.4.3/lintcmd/runner/runner.go:817 +0x130

created by honnef.co/go/tools/lintcmd/runner.(*Runner).Run

/home/karlik/go/pkg/mod/honnef.co/go/tools@v0.4.3/lintcmd/runner/runner.go:1267 +0x512