Crash: bitwise XOR

[ehaas]

_Static_assert((1 ^ - 1) == -2, "");

panic: index out of bounds: index 2, len 1
/Users/ehaas/local/zig-macos-x86_64-0.12.0-dev.3508+a6ed3e6d2/lib/std/math/big/int.zig:1974:36: 0x10a34123b in normalize (arocc)
        r.len = llnormalize(r.limbs[0..length]);
                                   ^
/Users/ehaas/local/zig-macos-x86_64-0.12.0-dev.3508+a6ed3e6d2/lib/std/math/big/int.zig:1283:24: 0x10a41c35e in bitXor (arocc)
            r.normalize(b.limbs.len + @intFromBool(a.positive != b.positive));
                       ^
/Users/ehaas/source/arocc/src/aro/Value.zig:749:25: 0x10a41bf85 in bitXor (arocc)
    result_bigint.bitXor(lhs_bigint, rhs_bigint);
                        ^