panic: interface conversion: types.Type is *types.TypeParam, not *types.Struct

[i11us0ry]

What version of Garble and Go are you using?

$ garble version
mvdan.cc/garble v0.13.0

$ go version
go1.23.0

What environment are you running Garble on?

arm64 darwin

go env Output

$ go env
GO111MODULE='on'
GOARCH='arm64'
GOBIN=''
GOCACHE='/Users/user/Library/Caches/go-build'
GOENV='/Users/user/Library/Application Support/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFLAGS=''
GOHOSTARCH='arm64'
GOHOSTOS='darwin'
GOINSECURE=''
GOMODCACHE='/Users/user/go/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='darwin'
GOPATH='/Users/user/go'
GOPRIVATE=''
GOPROXY='https://goproxy.cn,direct'
GOROOT='/Users/user/go/pkg/mod/golang.org/[email protected]'
GOSUMDB='sum.golang.org'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/Users/user/go/pkg/mod/golang.org/[email protected]/pkg/tool/darwin_arm64'
GOVCS=''
GOVERSION='go1.23.0'
GODEBUG=''
GOTELEMETRY='local'
GOTELEMETRYDIR='/Users/user/Library/Application Support/go/telemetry'
GCCGO='gccgo'
GOARM64='v8.0'
AR='ar'
CC='clang'
CXX='clang++'
CGO_ENABLED='1'
GOMOD='/Users/user/Desktop/work/tools/garble/go.mod'
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 -arch arm64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -ffile-prefix-map=/var/folders/3s/px98z93j0lz39tykygvb6pr00000gp/T/go-build55363994=/tmp/go-build -gno-record-gcc-switches -fno-common'

What did you do?

I wrote a tool myself that references the GitHub/projectdiscovery/utls/conn/connpool dependency, and then prepared to use Garble to obfuscate my tool

What did you expect to see?

I hope he can successfully confuse it

What did you see instead?

The following error occurred during the confusion process:

github.com/projectdiscovery/utils/conn/connpool

panic: interface conversion: types.Type is *types.TypeParam, not *types.Struct

I asked chatgpt and with their help, I made the following modifications to 1789 lines of code for the garrle/main.go program. After the modification, I recompiled Garble and confused my tools, and it succeeded. I want to know if this modification has a significant impact

	case *types.Struct:
		if structOrigin, ok := origin.(*types.Struct); ok {
			for i := 0; i < used.NumFields(); i++ {
				field := used.Field(i)
				fieldToStruct[field] = structOrigin

				if field.Embedded() {
					recordType(field.Type(), structOrigin.Field(i).Type(), done, fieldToStruct)
				}
			}
		} else {
			return
		}
	}

[lu4p]

Do you mind opening a PR with the change?

[mvdan]

There is no need to fix this bug; this entire chunk of code relating to alias tracking will be deleted once upstream Go makes a release with golang/go#70517.