MPV crashs when playing with srv3 subtitle

### mpv Information ```bash mpv v0.41.0-747-g7d245fd10 Copyright © 2000-2026 mpv/MPlayer/mplayer2 projects built on Jun 13 2026 13:21:43 libplacebo version: v7.365.0 (v7.360.0-81-g2d0979f-dirty) FFmpeg version: N-124996-g3773831c2 FFmpeg library versions: libavcodec 62.36.101 libavdevice 62.4.100 libavfilter 11.17.100 libavformat 62.19.101 libavutil 60.33.100 libswresample 6.4.100 libswscale 9.8.100 ``` ### Other Information ```text - Windows version: Microsoft Windows [Version 10.0.26200.8037] - GPU model, driver and version: NVIDA GeForce RTX 2060 SUPER - Source of mpv:https://github.com/zhongfly/mpv-winbuild/releases/tag/2026-06-13-7d245fd100 - Latest known working version: unknown - Issue started after the following happened: play with specific srv3 subtitle for sometime. ``` ### Reproduction Steps 1. Download this youtube clip(https://www.youtube.com/watch?v=1p3JUvYGnYw) and srv3 subtitle. (`yt-dlp --sub-format srv3 --sub-langs "en-Q6Rlwv0IHpI" --write-sub ...`. also in sample files.) 2. `mpv --no-config 'CTags vs ETags.mp4' --sub-file='CTags vs ETags.en-Q6Rlwv0IHpI.srv3'` 3. Hold right arrow key, fast forward to about 3 minutes, mpv crashs. ### Expected Behavior mpv keep playing. ### Actual Behavior mpv crashs. SEGV ### Log File log file: [output.txt](https://github.com/user-attachments/files/28918484/output.txt) dmp file: https://github.com/bennyyip/i/raw/refs/heads/main/mpv.exe.6156.7z ### Sample Files [CTags vs ETags.en-Q6Rlwv0IHpI.srv3](https://github.com/user-attachments/files/28918509/CTags.vs.ETags.en-Q6Rlwv0IHpI.txt) ### I carefully read all instruction and confirm that I did the following: - [x] I tested and confirmed that the issue exists with the [latest release version](https://github.com/mpv-player/mpv/releases/latest) or newer. - [x] I provided all required information including system and mpv version. - [x] I produced the log file with the exact same set of files, parameters, and conditions used in "Reproduction Steps", with the addition of `--log-file=output.txt`. - [x] I produced the log file while the behaviors described in "Actual Behavior" were actively observed. - [x] I attached the full, untruncated log file. - [x] I attached the backtrace in the case of a crash.