Error union on struct field initializer fails silently

[pedromsilvapt]

On Zig 0.8, if I have a struct field of type Dependency, and I try to assign to it a function that returns !Dependency, the compiler just fails without showing any error message.

Reproduce

const std = @import("std");

pub const Dependency = struct {
    a: i32,

    /// Remove the ! and the code now works
    pub fn init() !Dependency {
        return Dependency{
            .a = 5,
        };
    }
};

pub const Container = struct {
    dependency: Dependency = Dependency.init(),
};

pub fn main() void {
    std.debug.print("Hello world!\n", .{});

    const container = Container{};

    std.debug.print("a = {}\n", .{container.dependency.a});
}