General protection exception (no address available), or compiler crash, when accessing global anonymous struct variable from other file

[TheZipCreator]

Zig Version

0.14.0-dev.2253+3a6a8b8aa

Steps to Reproduce and Observed Behavior

a.zig:

const f = @import("./b.zig").f;

pub var foo = .{
    .x = @as(i32, 5)
};

pub fn main() !void {
    f();
}

pub fn setX(new: i32) void {
    foo.x = new;
}

b.zig:

const a = @import("./a.zig");

pub fn f() void{
    a.setX(10);
}

causes

General protection exception (no address available)
/tmp/test/a.zig:12:8: 0x1039835 in setX (a)
    foo.x = new;
       ^
/tmp/test/b.zig:4:11: 0x1037ecd in f (a)
    a.setX(10);
          ^
/tmp/test/a.zig:8:6: 0x1037eb8 in main (a)
    f();
     ^
/home/z/things/compilers/zig/lib/std/start.zig:617:37: 0x1037e91 in posixCallMainAndExit (a)
            const result = root.main() catch |err| {
                                    ^
/home/z/things/compilers/zig/lib/std/start.zig:248:5: 0x1037a8f in _start (a)
    asm volatile (switch (native_arch) {
    ^
???:?:?: 0x0 in ??? (???)

This doesn't happen if you give foo a type, like so:

// a.zig
pub var foo: struct { x: i32 } = .{
    .x = 5
};

or if you call the function from the same file:

// a.zig
pub fn main() !void {
    setX(10);
}

when trying to set the property directly, it causes a compiler crash:

// b.zig
pub fn f() void{
    a.foo.x = 10;
}

fish: Job 1, 'zig build-exe a.zig' terminated by signal SIGTRAP (Trace or breakpoint trap)

Expected Behavior

There shouldn't be a crash and the property should be updated correctly.