Zig Version

0.16.0-dev.726+8efcfeaf1

Steps to Reproduce and Observed Behavior

Hi, while testing the current master branch for an embedded project I noticed a regression versus 0.15.1 that I was previously using.
A C pointer created via ptrFromInt of an extern struct that has an array field cannot be dereferenced and indexed into anymore. It behaves differently than a C pointer created from a struct reference. Similar code is generated with translate-c from MMIO logic that compiles with 0.15.1 but not on master. Target independant.

zig build-exe main.zig

main.zig:

const ExternStruct = extern struct {
    fields: [2]u8,
};

pub fn main() void {
    // This works
    var my_struct = ExternStruct{ .fields = .{0} ** 2 };
    const my_struct_c_ptr1 = @as([*c]ExternStruct, &my_struct);
    my_struct_c_ptr1.*.fields[0] = 1;

    // error: expected type '[2]u8', found 'comptime_int'
    const my_struct_c_ptr2 = @as([*c]ExternStruct, @ptrFromInt(0x1000));
    my_struct_c_ptr2.*.fields[0] = 1;
}

These have the same type for some reason:

@compileLog(my_struct_c_ptr2.*.fields);
@compileLog(my_struct_c_ptr2.*.fields[0]);

Compile Log Output:
@as([2]u8, [runtime value])
@as([2]u8, [runtime value])

Help is appreciated, thank you

Expected Behavior

Compiles