BIP-346: correct TxFieldSelector index upper bound #2093

1. 
   yyhrnk commented at 5:49 pm on February 2, 2026: contributor

   Previously parse_inout_selection only rejected indices strictly greater than nb_items, allowing idx == nb_items to pass through and later cause a panic when indexing transaction inputs/outputs.

   Tightened the bounds check in parse_inout_selection to treat idx >= nb_items as out of bounds, enforcing the intended 0..nb_items-1 index range for TxFieldSelector individual mode.

2. fix: correct TxFieldSelector index upper bound e3c4dede41
3. murchandamus added the label Typo-to-be-collected on Feb 3, 2026
4. murchandamus added the label Pending acceptance on Feb 3, 2026
5. 
   murchandamus commented at 0:45 am on February 3, 2026: contributor

   cc: @stevenroose

Contributors
yyhrnk murchandamus

Labels
Pending acceptance Typo-to-be-collected