panic in goroutine deadlocks all routines and does not panic program

[traetox]

Suspected behavior

A panic in a scriggo originated go routine stalls the program, the panic does not propagate up and terminate the program.

Minimal Program

package main

func main() {
	count := 4
	ch := make(chan string, count)
	for i := 0; i < count; i++ {
		go runner(ch, string([]byte{0x30 + byte(i)}))
	}
	for {
		ch <- "stuff"
	}
}

func runner(ch chan string, id string) {
	if id == "3" {
		panic("stuff")
	}
	for val := range ch {
		println(id, val)
	}
}

GC output

1 stuff
0 stuff
0 stuff
0 stuff
0 stuff
panic: stuff

goroutine 20 [running]:
main.runner(0xc000096000, 0x4c8bd8, 0x1)
	/tmp/otest/main.go:16 +0x105
created by main.main
	/tmp/otest/main.go:7 +0x9b

Scriggo output

0 0
0 0
0 0
10 20
 1
 12 
1
12 1
 21 1

2 2
2 2
fatal error: all goroutines are asleep - deadlock!

goroutine 1 [chan send]:
reflect.chansend(0xc000074480, 0xc0000109a0, 0x100, 0x6db1e3)
	/opt/golang/go/src/runtime/chan.go:737 +0x4b
reflect.Value.send(0xc00011a540, 0xc000074480, 0x12, 0x691600, 0xc0000109a0, 0x198, 0xc000014300, 0x5)
	/opt/golang/go/src/reflect/value.go:1551 +0x11c
reflect.Value.Send(0xc00011a540, 0xc000074480, 0x12, 0x691600, 0xc0000109a0, 0x198)
	/opt/golang/go/src/reflect/value.go:1533 +0x93
github.com/open2b/scriggo/internal/runtime.(*VM).run(0xc00014a120, 0x203000)
	/home/kris/mygo/pkg/mod/github.com/open2b/[email protected]/internal/runtime/run.go:1583 +0x22a7
github.com/open2b/scriggo/internal/runtime.(*VM).runRecoverable(0xc00014a120, 0x0, 0x0)
	/home/kris/mygo/pkg/mod/github.com/open2b/[email protected]/internal/runtime/run.go:72 +0x85
github.com/open2b/scriggo/internal/runtime.(*VM).runFunc(0xc00014a120, 0xc00010d1e0, 0x0, 0x0, 0x0, 0x6b5a20, 0xc00011e320)
	/home/kris/mygo/pkg/mod/github.com/open2b/[email protected]/internal/runtime/run.go:32 +0xc5
github.com/open2b/scriggo/internal/runtime.(*VM).Run(0xc00014a120, 0xc00010d1e0, 0xc000010910, 0x0, 0x0, 0x0, 0x0, 0x0)
	/home/kris/mygo/pkg/mod/github.com/open2b/[email protected]/internal/runtime/vm.go:153 +0xa9
github.com/open2b/scriggo.(*Program).Run(0xc000109410, 0x0, 0xc000104f38, 0xc000109410)
	/home/kris/mygo/pkg/mod/github.com/open2b/[email protected]/programs.go:143 +0xd6
main.main()
	/tmp/scriggo_test/main.go:21 +0x158

Complete test program

package main

import (
	"fmt"

	"github.com/open2b/scriggo"
)

func main() {
	// Create a file system with the file of the program to run.
	fsys := scriggo.Files{"main.go": []byte(src)}

	opts := scriggo.BuildOptions{AllowGoStmt: true}

	// Build the program.
	program, err := scriggo.Build(fsys, &opts)
	if err != nil {
		panic(err)
	}
	// Run the program.
	err = program.Run(nil)
	if err != nil {
		fmt.Println("RUN ERROR", err)
	}
	fmt.Println("DONE")
}

const src = `
	package main

        func main() {
		count := 4
		ch := make(chan string, count)
		for i := 0; i < count; i++ {
			go runner(ch, string([]byte{0x30+byte(i)}))
		}
		for {
			ch<-"stuff"
		}
	}

	func runner(ch chan string, id string) {
		if id == "3" {
			panic("stuff")
		}
		for val := range ch {
			println(id, val)
		}
        }
`