Warning: ‘memcpy’ specified bound between .... exceeds maximum object size

[keypey]

Describe the bug

Compile: v -keepc -prod -show-c-output test1.v

module main
// file:test1.v
import os

fn main() {
    mut i_full_path := os.join_path('/home/user1', 'test.conf')
    println(i_full_path)
}

Produced output with warning:

tmp/v_1000/pa_tech.tmp.c: In function ‘os__join_path_single.isra’:
/tmp/v_1000/pa_tech.tmp.c:13214:10: warning: ‘memcpy’ specified bound between 18446744071562067968 and 18446744073709551615 exceeds maximum object size 9223372036854775807 [-Wstringop-overflow=]
13214 |   return memcpy(dest, const_src, n);
      |          ^
/tmp/v_1000/test1.tmp.c: In function ‘print_backtrace_skipping_top_frames_linux.isra’:
/tmp/v_1000/test1.tmp.c:8549:10: warning: ‘memcpy’ specified bound between 18446744071562067968 and 18446744073709551615 exceeds maximum object size 9223372036854775807 [-Wstringop-overflow=]
 8549 |   return memcpy(dest, const_src, n);
      |          ^
=================================

Expected Behavior

No warning.

Current Behavior

Produce warning.

Reproduction Steps

Compile source from description.

Possible Solution

No response

Additional Information/Context

No response

V version

V 0.3.5 015ccc2

Environment details (OS name and version, etc.)

Distributor ID: Debian
Description:    Debian GNU/Linux 11 (bullseye)
Release:        11
Codename:       bullseye

Linux  5.10.0-23-amd64 #1 SMP Debian 5.10.179-1 (2023-05-12) x86_64 GNU/Linux

[JalonSolov]

Which C compiler do you have? And what version is it?

On Manjaro Linux it works fine with 3 different compilers:

tcc (that comes with V)
gcc (GCC) 13.1.1 20230429
clang version 15.0.7

All 3 work and show the same (expected) output:

$ v run foo.v
/home/user1/test.conf
$ v -cc gcc run foo.v
/home/user1/test.conf
$ v -cc clang run foo.v
/home/user1/test.conf
$

[keypey]

tcc.exe | tcc version 0.9.27 (x86_64 Linux)

v -keepc -g -showcc -show-c-output test1.v
> C compiler cmd: '/home/bruno/bin/v/thirdparty/tcc/tcc.exe' '@/tmp/v_1000/test1.tmp.c.rsp'
> C compiler response file "/tmp/v_1000/test1.tmp.c.rsp":
  -std=gnu99 -D_DEFAULT_SOURCE -g -o "/home/bruno/W7/Programowanie/v/postgres/test1" -D GC_BUILTIN_ATOMIC=1 -D GC_THREADS=1 -I "/home/bruno/bin/v/thirdparty/libgc/include" "/tmp/v_1000/test1.tmp.c" -bt25 -rdynamic "/home/bruno/bin/v/thirdparty/tcc/lib/libgc.a" -ldl -lpthread  
======== C Compiler output ========

But with gcc:

v -cc gcc -keepc -prod -show-c-output test1.v
======== C Compiler output ========
/tmp/v_1000/test1.tmp.c: In function ‘print_backtrace_skipping_top_frames_linux.isra’:
/tmp/v_1000/test1.tmp.c:8549:10: warning: ‘memcpy’ specified bound between 18446744071562067968 and 18446744073709551615 exceeds maximum object size 9223372036854775807 [-Wstringop-overflow=]
 8549 |   return memcpy(dest, const_src, n);
      |          ^

gcc (Debian 10.2.1-6) 10.2.1 20210110