gistfile1.txt

Process 60490 stopped
* thread #2, stop reason = EXC_BAD_ACCESS (code=1, address=0x118000160)
    frame #0: 0x00000001000e9b62 rav1e`_$LT$core..iter..adapters..chain..Chain$LT$A$C$B$GT$$u20$as$u20$core..iter..traits..iterator..Iterator$GT$::fold::hffc8c2d5f58aa75e [inlined] rav1e::encoder::FrameState$LT$T$GT$::compute_activity_mask::_$u7b$$u7b$closure$u7d$$u7d$::hbe5264fd4fdf3ac6((null)=<unavailable>, (null)=&0x118000160) at encoder.rs:404:62 [opt]
   401
   402 	        let block = luma.subregion(block_rect);
   403
-> 404 	        let mut mean: i32 = block.rows_iter().flatten().map(|&val| {let int: i32 = CastFromPrimitive::cast_from(val); int}).sum();
   405 	        mean = mean >> (xdec + ydec);
   406 	        let deviation: Vec<i16> = block.rows_iter().flatten().map(|&pix| {let pix_int: i16 = CastFromPrimitive::cast_from(pix); pix_int - mean as i16}).collect();
   407
Target 0: (rav1e) stopped.

I don't understand how there's a segfault here. Is there something wrong with the Areas?

I assume block_rect is wrong and that means that subregion is not doing the boundary checks.

rows_iter() seems the problem.