os.read_lines panic: int(20983250944) cast results in -491585536

[leoliu0]

OS: linux, "Arch Linux"
Processor: 128 cpus, 64bit, little endian, AMD Ryzen Threadripper 3990X 64-Core Processor
CC version: cc (GCC) 12.2.0

getwd: /home/leo/Downloads
vmodules: /home/leo/.vmodules
vroot: /home/leo/v
vexe: /home/leo/v/v
vexe mtime: 2022-09-28 06:56:48
is vroot writable: true
is vmodules writable: true
V full version: V 0.3.1 d6b594c.bdf4c67

Git version: git version 2.37.3
Git vroot status: weekly.2022.39-5-gbdf4c679
.git/config present: true
thirdparty/tcc status: thirdparty-linux-amd64 827f7452

What did you do?
use os.read_lines to read a large file (about 20G csv)

import os
a := os.read_lines(os.args[1]) or { panic(err) }

What did you expect to see?
file being read

What did you see instead?

V panic: int(20983250944) cast results in -491585536
v hash: 385acb4
/tmp/v_1000/sv.11979449102949368545.tmp.c:7535: at _v_panic: Backtrace
/tmp/v_1000/sv.11979449102949368545.tmp.c:17156: by main__main
/tmp/v_1000/sv.11979449102949368545.tmp.c:17557: by main