call V from C not working when closure.

[herudi]

Describe the bug

i tried calling v from c via shared lib. but it doesn't work on closure of v. signal 11: segmentation fault. but if not closure is not a problem.

Reproduction Steps

V code

// foo.v
[export: 'foo']
fn show_foo(s &char) {
	my_fn := fn [s]() {
		println(unsafe { cstring_to_vstring(s) })
	}
	my_fn()
}

command: v -cc gcc -shared foo.v

C code

extern void foo(const char* s);

int main() {
	foo("bar");
}

compile: gcc foo.c foo.so -o foo -Wl,-rpath=.

next i call ./foo in terminal.

Expected Behavior

Expected output is bar in terminal.

Current Behavior

signal 11: segmentation fault
| 0x7fdf57847090 | /lib/x86_64-linux-gnu/libc.so.6(+0x43090) 

Possible Solution

No response

Additional Information/Context

No response

V version

Current V version: V 0.4.1 a8a3d3a, timestamp: 2023-09-26 07:02:39 +0300

Environment details (OS name and version, etc.)

V full version: V 0.4.1 20bce37.a8a3d3a
OS: linux, Pop!_OS 20.04 LTS
Processor: 4 cpus, 64bit, little endian, Intel(R) Core(TM) i3-4030U CPU @ 1.90GHz

getwd: /home/herudi/deno/ffi-deno
vexe: /home/herudi/vlang/v
vexe mtime: 2023-09-26 04:11:20

vroot: OK, value: /home/herudi/vlang
VMODULES: OK, value: /home/herudi/.vmodules
VTMP: OK, value: /tmp/v_1000

Git version: git version 2.25.1
Git vroot status: weekly.2023.28-458-ga8a3d3a6
.git/config present: true

CC version: cc (Ubuntu 9.4.0-1ubuntu1~20.04.1) 9.4.0
thirdparty/tcc status: thirdparty-linux-amd64 12f392c3

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