invalid memory address or nil pointer dereference when registering centralized error handler

[arpodungge]

Using aah v0.12.3

I'm creating a new api project with aah new
I've found an issue when i try to create centralized error handler by creating AppErrorHandler function and register it in init.go by following the instruction from
https://docs.aahframework.org/v0.12/error-handling.html#registering-centralized-error-handler

func AppErrorHandler(ctx *aah.Context, err *aah.Error) bool {
    switch err.Code {
	case 400:
		// handle bad request
	case 401:
		// handle unauthenticated request
	case 403:
		// handle permission issues
	case 500:
		// handle internal server issues
    }
    return true
}

func init() {
    app := aah.App()
    app.SetErrorHandler(AppErrorHandler)
}

an error occurred when i run it with aah run :

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x8a7974]

goroutine 1 [running]:
aahframe%2ework.(*errorManager).SetHandler(0x0, 0xa29780)
/home/user1/go/pkg/mod/aahframe.work@v0.12.3/error.go:132 +0x34
aahframe%2ework.(*Application).SetErrorHandler(0xc0001e21c0, 0xa29780)
/home/user1/go/pkg/mod/aahframe.work@v0.12.3/aah.go:400 +0x3c
main.init.0()
/home/user1/ws_aah/aah-app/app/init.go:43 +0x118
FATAL aah application did not start

Thanks

[jeevatkm]

@arpodungge It seems I need to update the documentation. Please use OnStart event, update your code to

app := aah.App()
app.OnStart(func(e *aah.Event) {
  app.SetErrorHandler(AppErrorHandler)
})

[jeevatkm]

I'm closing this one. Please let me know.