compiling to wasm with github.com/google/gopacket dependency hangs

[bonifaido]

trafficstars

I couldn't get any logs out of it, but a very simple application which instantiates a packet struct in the main hangs forever instead of getting compiled:

package main

import (
	"github.com/google/gopacket"
	"github.com/google/gopacket/layers"
)

func main() {
	// Decode a packet
	_ = gopacket.NewPacket([]byte("my random data"), layers.LayerTypeEthernet, gopacket.Default)
}

tinygo build -target wasm main.go

Result: tinygo is using near 400% CPU, and compilation never finishes.

PS: I know that not all libraries are supported, just wanted to know what is the reason of this.

[JounQin]

I have similar issue when upgrading.

An reproduction:

https://github.com/un-ts/sh-syntax/blob/775b7e74ee352bbd89233e97531ef9aa30e8ea19/package.json#L79

You can run tinygo build -o main.wasm -target wasm --no-debug, it will hang for a long time, and my test cases are all broken after compiled successfully.

[ceerlepy]

I have similar issue with "github.com/sijms/go-ora/v2" this dependency. when I run with --> env CGO_ENABLED=0 tinygo build -o main.wasm -target wasm command, it is hanging and not finished but when I run with --> tinygo build -o main.wasm -target wasm, it is throwning this issues

# os/user
/usr/local/go/src/os/user/lookup.go:15:41: undeclared name: current
/usr/local/go/src/os/user/lookup.go:36:9: undeclared name: lookupUser
/usr/local/go/src/os/user/lookup.go:45:9: undeclared name: lookupUserId
/usr/local/go/src/os/user/lookup.go:51:9: undeclared name: lookupGroup
/usr/local/go/src/os/user/lookup.go:57:9: undeclared name: lookupGroupId
/usr/local/go/src/os/user/lookup.go:62:9: undeclared name: listGroups

Do you have any idea why is this happening ?

[dgryski]

Try the building with -tags=osusergo. But my guess is that you'll hit the same hang (which I think is probably due to a bug in the interp pass, which there are already bugs filed about.)