Dynamic library, OSX, Segmentation fault

[adjivas]

Durring a test on Linux and OSX, I have found a SegV for OSX system for this code of demonstration.

According to my observations, the accident happend when the dlclose(3)'s function is called for a dynamic crate named hello is used without the nostd mode, it's why in my report a simple println!'s will cause a Segv.

I tried this code:
hello/src/lib.rs

#[no_mangle]
pub unsafe extern "C" fn start(common: *mut Segment) {
println!("This println cause de SegV when the dylib is closed");
...

src/main.rs

...
assert_ne!(libc::dlclose(handle), -1);

I expected to see this happen: 5763 Segmentation fault: 11

The rust-lldb trace:

(lldb) run
Process 5350 launched: '/Users/adjivas/Repos/share/target/debug/share' (x86_64)
This println cause de SegV when the dylib is closed
cProcess 5350 stopped
* thread #1: tid = 0x244c60, 0x000000010122ab80, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x10122ab80)
    frame #0: 0x000000010122ab80
error: memory read failed for 0x10122aa00

[alexcrichton]

IIRC this is the same as nagisa/rust_libloading#5 and a dupe of #28794

[alexcrichton]

Er didn't mean to close, I'm not 100% sure! If it is the same though, feel free to close!

[adjivas]

It's exactly the same issue as #28794, it's why I close this.