Bug#860263: gcc-7: False -Wimplicit-fallthrough when case has braces

[Matthias Klose <doko@debian.org>]

Control: forwarded -1 https://gcc.gnu.org/PR81230
Control: tags -1 + upstream

On 13.04.2017 19:32, James McCoy wrote:
> Source: gcc-7
> Version: 7-20170407-1
> Severity: normal
> 
> $ gcc-7 -Wextra -o foo foo.c
> foo.c: In function 'main':
> foo.c:6:9: warning: this statement may fall through [-Wimplicit-fallthrough=]
>     argc = 0;
>     ~~~~~^~~~
> foo.c:9:3: note: here
>    default:
>    ^~~~~~~
> $ cat foo.c
> int main(int argc, char **argv)
> {
>     switch (argc)
>     {
>         case 1: {
>             argc = 0;
>             //fallthrough
>         }
>         default:
>             argc = 1;
>             break;
>     }
> 
>     return 0;
> }
> 
> Removing the braces for "case 1:" removes the warning.


moving the fall through comment behind the closing brace avoids the warning as well.