Pumpkin-MC/Pumpkin · error · PluginInitError

Calling `get_metadata` failed

Error message

Calling `get_metadata` failed: {0}

What it means

`CallGetMetadataFailed` wraps a wasmtime::Error raised when the host calls the plugin's exported `get_metadata` function to read the plugin's name/version during loading. The call trapped or returned an error instead of valid metadata.

Solutions

1. Rebuild the plugin with the current pumpkin-plugin SDK so get_metadata matches the host world
2. Check the wrapped wasmtime::Error for a missing export or signature mismatch
3. Validate the plugin component with `wasm-tools validate`
4. Verify plugin file integrity (re-download/rebuild)

fn metadata_failure(e: &PluginError) -> Option<&wasmtime::Error> { if let PluginError::CallGetMetadataFailed(e) = e { Some(e) } else { None } }

match result { Err(PluginError::CallGetMetadataFailed(e)) => { log::warn!("skipping plugin, get_metadata failed: {e}"); None }, other => other.ok() }

When it happens

Trigger: Invoking `get_metadata` on a freshly instantiated plugin component whose exported function traps or returns Err.

Common situations: Plugin built for an older WIT world where get_metadata has a different signature; plugin panics inside get_metadata; corrupted/mismatched component binary.

Related errors

• Calling `init_plugin` failed
• Engine creation failed
• failed to add player resource
• Failed to instantiate plugin
• Failed to load plugin as component

AI-assisted analysis of Pumpkin-MC/Pumpkin@8d4639e25a (2026-09-09). Data as JSON: /api/errors/419a07e5be3f894b. Report an issue: GitHub.

Appendix: source

Thrown at crates/pumpkin/src/plugin/loader/wasm/wasm_host/mod.rs:41

    #[error("Engine creation failed: {0}")]
    EngineCreationFailed(wasmtime::Error),
    #[error("Failed to setup linker: {0}")]
    LinkerSetupFailed(wasmtime::Error),
    #[error("Plugin is built against a different API version: {0}")]
    ApiVersionMismatch(wasmtime::Error),
    #[error("Failed to read plugin file: {0}")]
    FileReadFailed(std::io::Error),
    #[error("Failed to load plugin as component: {0}")]
    ComponentNewFailed(wasmtime::Error),
    #[error("Failed to create cache data for plugin: {0}")]
    ComponentCacheSerializeFailed(wasmtime::Error),
    #[error("Failed to write cache file for plugin: {0}")]
    ComponentCacheWriteFailed(std::io::Error),
    #[error("Failed to instantiate plugin: {0}")]
    InstantiationFailed(wasmtime::Error),
    #[error("Calling `init_plugin` failed: {0}")]
    CallInitPluginFailed(wasmtime::Error),
    #[error("Calling `get_metadata` failed: {0}")]
    CallGetMetadataFailed(wasmtime::Error),
    #[error("Failed to get absolute path: {0}")]
    PathResolutionFailed(std::io::Error),
    #[error("Failed to create cache: {0}")]
    CacheCreationFailed(wasmtime::Error),
}

#[derive(Clone, Copy, Default)]
struct SocketPolicy {
    tcp_connect: bool,
    tcp_bind: bool,
    udp_send: bool,
    udp_receive: bool,
    udp_bind: bool,
    loopback_only: bool,
}

impl SocketPolicy {

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