/// repro.zig
const std = @import("std");
const expect = std.testing.expect;

const PackedStruct = packed struct {
    a: u48,
    b: u48,
    c: u16,
};

test "reading a packed struct" {
    const file = try std.fs.cwd().openFile("repro.zig", .{});
    const reader = file.reader();
    _ = try reader.readStruct(PackedStruct);
    const pos_from_reading_struct = try reader.context.getPos();
    try reader.context.seekTo(0);
    _ = try reader.readBytesNoEof(@bitSizeOf(PackedStruct) / 8);
    const pos_from_reading_bytes = try reader.context.getPos();
    std.log.warn("{}, {}", .{ pos_from_reading_struct, pos_from_reading_bytes });
    try expect(pos_from_reading_struct == pos_from_reading_bytes);
}