panic: inf is outside the range of representable values of type 'int'

[Southporter]

In v0.6.0

Minimal Repro:

const std = @import("std");
const zlua = @import("zlua");

const Lua = zlua.Lua;

pub fn main() anyerror!void {
    var gpa: std.heap.DebugAllocator(.{}) = .init;
    const allocator = gpa.allocator();
    defer _ = gpa.deinit();

    var lua = try Lua.init(allocator);
    defer lua.deinit();
    lua.openLibs();

    try lua.doString(
        \\local test = {}
        \\ test[math.huge] = "To infinity"
        \\ print(test[math.huge])
        \\ return test
    );
}

I put this in the examples folder, created a separate example for it in build.zig and used the following:

zig build -Dlang=lua51 run-example-ubsan

It seems to only happen for lua51. Did not get the same error for > 5.1
It does NOT fail with luajit because that has sanitize-c set to off

[robbielyman]

This patch appears to resolve the issue?

--- a/build/lua.zig
+++ b/build/lua.zig
@@ -47,6 +47,7 @@
         .target = target,
         .optimize = optimize,
         .link_libc = true,
+        .sanitize_c = if (lang == .lua51) .off else null,
     });
     const library = b.addLibrary(.{
         .name = library_name,

[Southporter]

Yes, that fixed the issue for me. Would you like me to put together a pr for it, or is it easier to let you?