Extremely long error messages caused by slices into embedded file

[ssmid]

Zig Version

0.14.0-dev.121+ab4c461b7

Steps to Reproduce and Observed Output

• @embedfile("something.xml")
• parse at comptime

Shortened reproducer:

const std = @import("std");

pub fn main() void {
    comptime {
        const wayland_xml = XML.parse(wayland_xml_source);
        // some nonsense which causes an error message
        _ = try std.fmt.parseInt(u32, SomeType(wayland_xml.root().attribute(&wayland_xml, "name").?){}, 0);
    }
}

fn SomeType(some_string: []const u8) type {
    return struct {
        const s = some_string;
    };
}

pub const XML = struct {
[...]
};

const wayland_xml_source = \\<?xml version="1.0" encoding="UTF-8"?>
\\<protocol name="wayland">
\\
[...]
;

Error:

error_msg_repro.zig:7:101: error: expected type '[]const u8', found 'error_msg_repro.SomeType("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<protocol name=\"wayland\">\n\n  <copyright>\n    Copyright [...]
error_msg_repro.zig:12:12: note: struct declared here
~/bin/zig-0.14.0.121+ab4c461b7/lib/std/fmt.zig:1496:40: note: parameter type declared here

Everytime a slice of above xml file makes it into an error message, the whole file will be printed.
Currently, the error output in my project is above 1MB.

Full reproducer: https://zigbin.io/c06707

Expected Output

Just output the data within the slice, not the data of the underlying array, especially if it's big.
In above case this would be something along the lines of:

error: expected type '[]const u8', found 'error_msg_repro.SomeType("wayland")'

[mlugg]

Unclear reproduction. Steps to reproduce should not require the reader to guess at what library you're using, how you are using it, etc. Give the contents of all files and exact commands to run.

If you give a clear repro, ping me and I'll reopen.

[ssmid]

@mlugg

[ssmid]

I think the problem was pretty obvious before, but here you go.