#update=initial version with error
#file=main.zig
pub fn main() !void {
    try @import("foo.zig").hello();
}
#file=foo.zig
pub fn hello() !void {
    try std.Io.File.stdout().writeStreamingAll(io, "Hello, World!\n");
}
#expect_error=foo.zig:2:9: error: use of undeclared identifier 'std'
#update=fix the error
#file=foo.zig
const std = @import("std");
pub fn hello() !void {
    try std.Io.File.stdout().writeStreamingAll(io, "Hello, World!\n");
}
const io = std.Io.Threaded.global_single_threaded.io();
#expect_stdout="Hello, World!\n"
#update=add new error
#file=foo.zig
const std = @import("std");
pub fn hello() !void {
    try std.Io.File.stdout().writeStreamingAll(io, hello_str);
}
const io = std.Io.Threaded.global_single_threaded.io();
#expect_error=foo.zig:3:52: error: use of undeclared identifier 'hello_str'
#update=fix the new error
#file=foo.zig
const std = @import("std");
const hello_str = "Hello, World! Again!\n";
pub fn hello() !void {
    try std.Io.File.stdout().writeStreamingAll(io, hello_str);
}
const io = std.Io.Threaded.global_single_threaded.io();
#expect_stdout="Hello, World! Again!\n"