d001ca1083
`AudioPool::load_from_serialized` sizes the slot Vec by pool_index and fills gaps
with empty `AudioFile::new(PathBuf::new(), …)` placeholders. Two bugs let a
placeholder reach the next save and abort it with "Is a directory":
- Off-by-one: `entries.max().unwrap_or(0) + 1` made an *empty* pool length 1, so a
project with no audio still got one placeholder. Size by `max(pool_index + 1)`
→ empty entries yield length 0.
- `serialize()` emitted placeholder slots: an empty path round-trips to
`relative_path = Some("")`, which `save_beam` resolves to the project directory
(`join("")`) and tries to read as media. Skip empty-path / no-packed-media slots.
- Defense in `save_beam`: gate referenced-media packing on `full.is_file()` (not
`exists()`), so any blank/dir path falls through to embedded data instead of
reading a directory.
Pre-existing; surfaced by a save → reload → save cycle on a raster-only project.
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|---|---|---|
| .. | ||
| audio | ||
| command | ||
| dsp | ||
| effects | ||
| io | ||
| tui | ||
| lib.rs | ||
| main.rs | ||
| tempo_map.rs | ||
| time.rs | ||