Segmentation Fault when compiling std.mem.swap of anonymous tuple

[bartbaer]

Zig Version

0.14.0-dev.208+854e86c56

Steps to Reproduce and Observed Behavior

When I tried to swap two anonymous tuples, the build failed. (on linux x86_64)

const std = @import("std");
pub fn main() void {
    var a = [_]struct{i32, i32}{.{1, 2}, .{3, 4}};
    std.mem.swap(struct{i32, i32}, &a[0], &a[1]);
}

Trying to compile it, you get:

$ cat main.zig
const std = @import("std");
pub fn main() void {
    var a = [_]struct{i32, i32}{.{1, 2}, .{3, 4}};
    std.mem.swap(struct{i32, i32}, &a[0], &a[1]);
}
$ zig build-exe main.zig
Segmentation fault

However, if I give the tuple a name, it works.
This compiles fine:

const std = @import("std");
const Pair = struct{i32, i32};
pub fn main() void {
    var a = [_]Pair{.{1, 2}, .{3, 4}};
    std.mem.swap(Pair, &a[0], &a[1]);
}

I tried looking for issues with segfault and swap, but did not find anything.

Expected Behavior

The compiler should not segfault, it should output a program or an error.

[Vexu]

Duplicate of #19497