Segfault on Intel mac

[mcdallas]

> cargo run 
    Finished dev [optimized + debuginfo] target(s) in 0.21s
     Running `target/debug/chrs`
[1]    46448 segmentation fault  cargo run

Something to do with the RNG

> lldb target/debug/chrs 
(lldb) target create "target/debug/chrs"
Current executable set to '/Users/mike/dev/chess-rs/target/debug/chrs' (x86_64).
(lldb) run
Process 44958 launched: '/Users/mike/dev/chess-rs/target/debug/chrs' (x86_64)
2023-09-29 16:50:22.391904+0100 chrs[44958:854203] SecTaskLoadEntitlements failed error=22 cs_flags=20, pid=44958
2023-09-29 16:50:22.392002+0100 chrs[44958:854203] SecTaskCopyDebugDescription: chrs[44958]/0#-1 LF=0
Process 44958 stopped
* thread #1, name = 'main', queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=EXC_I386_GPFLT)
    frame #0: 0x0000000100567e69 chrs`rand_chacha::guts::refill_wide::impl_avx2::hfed09f57a1cc3a1f at guts.rs:121:36 [opt]
   118 	) {
   119 	    let k = m.vec([0x6170_7865, 0x3320_646e, 0x7962_2d32, 0x6b20_6574]);
   120 	    let mut pos = state.pos64(m);
-> 121 	    let d0: Mach::u32x4 = m.unpack(state.d);
   122 	    pos = pos.wrapping_add(1);
   123 	    let d1 = d0.insert((pos >> 32) as u32, 1).insert(pos as u32, 0);
   124 	    pos = pos.wrapping_add(1);
Target 0: (chrs) stopped.
warning: chrs was compiled with optimization - stepping may behave oddly; variables may not be available.

it works fine with trunk serve