32bit debug builds panic (misaligned pointer dereference:)

[Trolldemorted]

Describe the bug

• sysinfo 0.29.3
• W10 (64bit) Pro 21H2 (Build 19044.3086)

To Reproduce

fn main() {
    let s = System::new_all();
}

cargo run --target i686-pc-windows-msvc

Callstack

thread 'main' panicked at 'misaligned pointer dereference: address must be a multiple of 0x8 but is 0x2ed2844', C:\Users\Benni\.cargo\registry\src\index.crates.io-6f17d22bba15001f\sysinfo-0.29.3\src\network_helper_win.rs:43:28
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
thread 'main' panicked at 'panic in a function that cannot unwind', library\core\src\panicking.rs:126:5
stack backtrace:
   0:   0x7fef4a - core::fmt::write
                       at /rustc/90c541806f23a127002de5b4038be731ba1458ca/library\core\src\fmt\mod.rs:1254
   1:   0x7eb1e1 - std::io::Write::write_fmt<std::sys::windows::stdio::Stderr>
                       at /rustc/90c541806f23a127002de5b4038be731ba1458ca/library\std\src\io\mod.rs:1698
   2:   0x7ee6d5 - std::sys_common::backtrace::_print
                       at /rustc/90c541806f23a127002de5b4038be731ba1458ca/library\std\src\sys_common\backtrace.rs:47
   3:   0x7ee6d5 - std::sys_common::backtrace::print
                       at /rustc/90c541806f23a127002de5b4038be731ba1458ca/library\std\src\sys_common\backtrace.rs:34
   4:   0x7f0497 - std::panicking::default_hook::closure$1
                       at /rustc/90c541806f23a127002de5b4038be731ba1458ca/library\std\src\panicking.rs:269
   5:   0x7f00f4 - std::panicking::default_hook
                       at /rustc/90c541806f23a127002de5b4038be731ba1458ca/library\std\src\panicking.rs:288
   6:   0x7f0c22 - std::panicking::rust_panic_with_hook
                       at /rustc/90c541806f23a127002de5b4038be731ba1458ca/library\std\src\panicking.rs:691
   7:   0x7f098d - std::panicking::begin_panic_handler::closure$0
                       at /rustc/90c541806f23a127002de5b4038be731ba1458ca/library\std\src\panicking.rs:580
   8:   0x7ef205 - std::sys_common::backtrace::__rust_end_short_backtrace<std::panicking::begin_panic_handler::closure_env$0,never$>
                       at /rustc/90c541806f23a127002de5b4038be731ba1458ca/library\std\src\sys_common\backtrace.rs:150
   9:   0x7f06b4 - std::panicking::begin_panic_handler
                       at /rustc/90c541806f23a127002de5b4038be731ba1458ca/library\std\src\panicking.rs:578
  10:   0x80473c - core::panicking::panic_nounwind_fmt
                       at /rustc/90c541806f23a127002de5b4038be731ba1458ca/library\core\src\panicking.rs:96
  11:   0x8047f7 - core::panicking::panic_nounwind
                       at /rustc/90c541806f23a127002de5b4038be731ba1458ca/library\core\src\panicking.rs:126
  12:   0x80492c - core::panicking::panic_cannot_unwind
                       at /rustc/90c541806f23a127002de5b4038be731ba1458ca/library\core\src\panicking.rs:188
  13:   0x75b0fd - sysinfo::network::refresh_networks_addresses
                       at C:\Users\Benni\.cargo\registry\src\index.crates.io-6f17d22bba15001f\sysinfo-0.29.3\src\network.rs:11
  14:   0x75b0fd - sysinfo::network::refresh_networks_addresses
                       at C:\Users\Benni\.cargo\registry\src\index.crates.io-6f17d22bba15001f\sysinfo-0.29.3\src\network.rs:11
  15:   0x77fbb1 - sysinfo::windows::network::impl$1::refresh_networks_list
                       at C:\Users\Benni\.cargo\registry\src\index.crates.io-6f17d22bba15001f\sysinfo-0.29.3\src\windows\network.rs:153
  16:   0x742735 - sysinfo::traits::SystemExt::refresh_networks_list<sysinfo::windows::system::System>
                       at C:\Users\Benni\.cargo\registry\src\index.crates.io-6f17d22bba15001f\sysinfo-0.29.3\src\traits.rs:968
  17:   0x742b15 - sysinfo::windows::system::impl$3::new_with_specifics
                       at C:\Users\Benni\.cargo\registry\src\index.crates.io-6f17d22bba15001f\sysinfo-0.29.3\src\windows\system.rs:113
  18:   0x73120f - sysinfo::traits::SystemExt::new_all<sysinfo::windows::system::System>
                       at C:\Users\Benni\.cargo\registry\src\index.crates.io-6f17d22bba15001f\sysinfo-0.29.3\src\traits.rs:643
thread caused non-unwinding panic. aborting.

[GuillaumeGomez]

Just to be sure I'm not missing something: you build a 64 bits executable and run it on a 32 bits target?

[Trolldemorted]

sorry, I put the wrong command into this issue - I am building a 32bit executable (i686-pc-windows-msvc) and running it on a 64bit machine. So --target x86_64-pc-windows-msvc works but --target i686-pc-windows-msvc does not, I have amended my post.

[GuillaumeGomez]

I'm sorry but I can't work on a fix here since I don't have the tools to check that. If you want it to be fixed, you'll need to fix it yourself. A patch is very welcome of course.

[Trolldemorted]

Unfortunately I don't even know where the error message is from - is this a rustc "feature"?

[GuillaumeGomez]

The error is emitted by the compiler because apparently, a pointer address is apparently is invalid, meaning it cannot be dereferenced. That's what I understood from what you pasted.

[Trolldemorted]

Well something complains about the alignment of the address, but why would it demand that the pointer is 8 byte aligned? Especially on x86, which should be rather forgiving when it comes to alignment.

[Trolldemorted]

I think we are hitting rust-lang/rust#112480

[GuillaumeGomez]

Should be fixed by rust-lang/rust#112684. Closing then since it's not a sysinfo bug.

[Trolldemorted]

Fingers crossed for rustc 1.71 then, I guess