VulkanDebug() == true panics

[fzwoch]

Enabling VulkanDebug() causes a panic during registering the debug callback in cgo.

$ go version
go version go1.11.12 linux/amd64

2019/07/24 11:28:36 vulkan: enabling 0 instance extensions
panic: runtime error: cgo argument has Go pointer to Go pointer

goroutine 1 [running]:
github.com/vulkan-go/vulkan.CreateDebugReportCallback.func1(0x10fd490, 0x11766b0, 0x0, 0xc0000cea68, 0x10fd490)
	/home/fzwoch/go/pkg/mod/github.com/vulkan-go/[email protected]/vulkan.go:1556 +0xcd
github.com/vulkan-go/vulkan.CreateDebugReportCallback(0x10fd490, 0xc0000f7da0, 0x0, 0xc0000cea68, 0x0)
	/home/fzwoch/go/pkg/mod/github.com/vulkan-go/[email protected]/vulkan.go:1556 +0x57
github.com/vulkan-go/asche.NewPlatform(0x52bca0, 0xc0000ae370, 0x0, 0x0, 0xc000070f88, 0xc0000a4058)
	/home/fzwoch/go/pkg/mod/github.com/vulkan-go/[email protected]/platform.go:95 +0x1aee
main.main()

example.go:

package main

import (
	as "github.com/vulkan-go/asche"
	vk "github.com/vulkan-go/vulkan"
)

type application struct {
	as.BaseVulkanApp
}

func (a *application) VulkanDebug() bool {
	return true
}

func main() {
	if err := vk.SetDefaultGetInstanceProcAddr(); err != nil {
		panic(err)
	}

	if err := vk.Init(); err != nil {
		panic(err)
	}

	app := &application{}

	as.NewPlatform(app)
}

[xlab]

Debug callbacks are tricky with cgo, needs more research. Probably the issue here is caused by newer Go version that added more safety checks.

Thx for the report.