### Bug Description The `organize_files` function in craft-parts does not properly detect collisions when the destination is a directory. If an entry organize a file to a destination and then a second entry also tries to organize to the same destination but expressed as a directory, it fails because the call to `file_utils.move(src,dst)` fails. However this error is not handled and is "swallowed". The function should probably check if the destination exists when `overwrite` is `False` before calling `file_utils.move(src,dst)`. ### To Reproduce Running `python3 -mcraft_parts --trace -v prime` with this project file fails with `Error: None`. ### part yaml ```shell parts: rootfs: plugin: nil override-build: | mkdir $CRAFT_PART_INSTALL/foo mkdir $CRAFT_PART_INSTALL/bar echo "a from foo" > $CRAFT_PART_INSTALL/foo/a echo "a from bar" > $CRAFT_PART_INSTALL/bar/a organize: 'bar/a': /qux/a 'foo/a': /qux/ ``` ### Relevant log output ```shell INFO:craft_parts.executor.executor:Installing build-packages Execute: Pull rootfs Execute: Overlay rootfs Execute: Build rootfs + mkdir /home/paul/scratch/craft-parts/parts/rootfs/install/foo + mkdir /home/paul/scratch/craft-parts/parts/rootfs/install/bar + echo 'a from foo' + echo 'a from bar' Error: None. ```