Slicing plus pointer decay segfaults the compiler

[LemonBoy]

I wonder if I'm doing something wrong or (and that's very likely) it's just another bug.

pub fn main() void {
    var buf: [16]u8 = undefined;
    const fo1: [*:0]const u8 = buf[0..:0];
}

[andrewrk]

Looks like yet another result location bug. You can work around like this:

    const x = buf[0..:0];
    foo(x);

[LemonBoy]

Looks like yet another result location bug

Indeed, the problem seems to be the cast from slice to pointer that generates a i8* result_loc instead of a slice struct one.

[mikdusan]

I think master is now correct. If someone else can eyeball and confirm, I'll add the following tests:

compiler-error

export fn foo() void {
    var buf: [16]u8 = undefined;
    const p: [*:0]const u8 = buf[0..:0];
}

./bug0.zig:3:33: error: expected type '[*:0]const u8', found '*[16]u8'
    const p: [*:0]const u8 = buf[0..:0];
                                ^
./bug0.zig:3:33: note: destination pointer requires a terminating '0' sentinel
    const p: [*:0]const u8 = buf[0..:0];
                                ^

behaviour

export fn foo() void {
    var buf: [16]u8 = undefined;
    const p: [*:0]const u8 = buf[0..15 :0];
}