GCC 7.1 Fallthrough Warning Question

[Jonathan Wakely]

On 26 September 2017 at 20:54, Josh wrote:
> For gcc 7.1.1, I noticed the following will give a warning ("warning:
> this statement may fall through") if you have -Wall on:
>
> switch (Z) {
>   case X: {
>      break;
>   }
>   // fallsthrough
>   default: {
>     //..some code
>   }
> }

I don't get any warning for a simple example based on this snippet.
Could you show a complete example that we can actually compile to
reproduce the warning you see?


> but removing the braces around the default block fixes it:
>
> switch (Z) {
>   case X: {
>      break;
>   }
>   // fallsthrough
>   default:
>     //..some code
> }
>
> Is this intended or a possible bug?
>
> -Josh