Files
mruby-mruby/mrbgems
Yukihiro "Matz" Matsumoto d1aa722a98 mruby-compiler: fix JMPNOT+JMP optimization for nested alternatives
The previous optimization for converting JMPNOT+JMP to JMPIF in
alternative patterns had two bugs:

1. It triggered incorrectly for nested alternatives like `1 | 2 | 3`
   (parsed as `((1|2)|3)`), causing memory corruption.

2. The chain end detection was wrong - it checked `prev_offset == 0`
   but the chain actually ends when `(pos+2) + offset == 0`.

Fix by:
- Only applying optimization when left pattern is not NODE_PAT_ALT
- Correctly detecting chain end by checking if next_addr == 0
- Properly unlinking the last JMPNOT from the fail chain

Co-authored-by: Claude <noreply@anthropic.com>
2025-12-25 18:01:43 +09:00
..
2025-10-25 21:05:39 +09:00
2024-09-24 00:14:24 +10:00