bevyengine/bevy · error · ParseAssetPathError

Asset label must be at least one character. Either specify t

Error message

Asset label must be at least one character. Either specify the label after the '#' or remove the '#'

What it means

ParseAssetPathError variant raised when a path string ends with a trailing '#' with no label after it (e.g. 'file.test#'). A label must be at least one character; the '#' should either get a label or be removed.

Source

Thrown at crates/bevy_asset/src/path.rs:95

        }
        Ok(())
    }
}

/// An error that occurs when parsing a string type to create an [`AssetPath`] fails, such as during [`AssetPath::parse`].
#[derive(Error, Debug, PartialEq, Eq)]
pub enum ParseAssetPathError {
    /// Error that occurs when the [`AssetPath::source`] section of a path string contains the [`AssetPath::label`] delimiter `#`. E.g. `bad#source://file.test`.
    #[error("Asset source must not contain a `#` character")]
    InvalidSourceSyntax,
    /// Error that occurs when the [`AssetPath::label`] section of a path string contains the [`AssetPath::source`] delimiter `://`. E.g. `source://file.test#bad://label`.
    #[error("Asset label must not contain a `://` substring")]
    InvalidLabelSyntax,
    /// Error that occurs when a path string has an [`AssetPath::source`] delimiter `://` with no characters preceding it. E.g. `://file.test`.
    #[error("Asset source must be at least one character. Either specify the source before the '://' or remove the `://`")]
    MissingSource,
    /// Error that occurs when a path string has an [`AssetPath::label`] delimiter `#` with no characters succeeding it. E.g. `file.test#`
    #[error("Asset label must be at least one character. Either specify the label after the '#' or remove the '#'")]
    MissingLabel,
}

impl<'a> AssetPath<'a> {
    /// Creates a new [`AssetPath`] from a string in the asset path format:
    /// * An asset at the root: `"scene.gltf"`
    /// * An asset nested in some folders: `"some/path/scene.gltf"`
    /// * An asset with a "label": `"some/path/scene.gltf#Mesh0"`
    /// * An asset with a custom "source": `"custom://some/path/scene.gltf#Mesh0"`
    ///
    /// Prefer [`From<'static str>`] for static strings, as this will prevent allocations
    /// and reference counting for [`AssetPath::into_owned`].
    ///
    /// # Panics
    /// Panics if the asset path is in an invalid format. Use [`AssetPath::try_parse`] for a fallible variant
    pub fn parse(asset_path: &'a str) -> AssetPath<'a> {
        Self::try_parse(asset_path).unwrap()
    }

View on GitHub (pinned to 8d743eb7dc)

Solutions

1. Add the intended subasset label after the '#'
2. Strip the trailing '#' if no label was meant
3. Fix string building/trimming that leaves a dangling '#'

When it happens

Trigger: Thrown at crates/bevy_asset/src/path.rs:95 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of bevyengine/bevy@8d743eb7dc (2026-08-20). Data as JSON: /api/errors/6dd1f2368331f34f. Report an issue: GitHub.