FLAC: Ignore ID3v2 tags in Vorbis Comment writer

Author: Serial-ATA

CHANGELOG.md

@@ -8,7 +8,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [0.23.2] - 2026-02-14
 
-- **FLAC**: Fix duplicate `Last-metadata-block` flags in the presence of PADDING blocks ([issue](https://github.com/Serial-ATA/lofty-rs/issues/607)) ([PR](https://github.com/Serial-ATA/lofty-rs/pull/609))
+- **FLAC**:
+  - Fix duplicate `Last-metadata-block` flags in the presence of PADDING blocks ([issue](https://github.com/Serial-ATA/lofty-rs/issues/607)) ([PR](https://github.com/Serial-ATA/lofty-rs/pull/609))
+  - Ignore ID3v2 tags when not stripped during write ([issue](https://github.com/Serial-ATA/lofty-rs/issues/608)) ([PR](https://github.com/Serial-ATA/lofty-rs/pull/609))
+    - Previously, the Vorbis Comments writer assumed that the ID3v2 tag had already been stripped.
+      If that wasn't the case, it would error that it couldn't find the FLAC stream marker.
 
 ## [0.23.1] - 2026-02-08
 

lofty/src/flac/write.rs

@@ -2,6 +2,7 @@ use super::block::{BLOCK_ID_PADDING, BLOCK_ID_PICTURE, BLOCK_ID_VORBIS_COMMENTS,
 use super::read::verify_flac;
 use crate::config::WriteOptions;
 use crate::error::{LoftyError, Result};
+use crate::id3::{FindId3v2Config, find_id3v2};
 use crate::macros::{err, try_vec};
 use crate::ogg::tag::VorbisCommentsRef;
 use crate::picture::{Picture, PictureInformation};
@@ -76,6 +77,9 @@ where
 
 	let mut cursor = Cursor::new(file_bytes);
 
+	// We don't actually need the ID3v2 tag, but reading it will seek to the end of it if it exists
+	find_id3v2(&mut cursor, FindId3v2Config::NO_READ_TAG)?;
+
 	let stream_info = verify_flac(&mut cursor)?;
 	let stream_info_start = stream_info.start as usize;
 	let stream_info_end = stream_info.end as usize;