zed-industries/zed · error · anyhow::Error

from extension \"{}\" version {}: {}

Error message

from extension \"{}\" version {}: {}

What it means

This is the extension_error formatting helper pattern: it wraps an error originating inside a wasm extension with context 'from extension \"{name}\" version {version}: {inner}'. The message is a context wrapper, not a distinct failure — the actual cause is the inner error produced by the extension's own code (e.g. an npm install/version lookup failure), attributed here so users know which extension is at fault.

Source

Thrown at crates/extension_host/src/wasm_host.rs:978

            }))
            .unwrap_or_else(|_| {
                panic!(
                    "main thread message channel should not be closed yet, extension {} (id {})",
                    self.manifest.name, self.manifest.id,
                )
            });
        let name = self.manifest.name.clone();
        let id = self.manifest.id.clone();
        async move {
            return_rx.await.unwrap_or_else(|_| {
                panic!("main thread message channel, extension {name} (id {id})")
            })
        }
    }

    fn work_dir(&self) -> PathBuf {
        self.host.work_dir.join(self.manifest.id.as_ref())
    }

    fn extension_error(&self, message: String) -> anyhow::Error {
        anyhow!(
            "from extension \"{}\" version {}: {}",
            self.manifest.name,
            self.manifest.version,
            message
        )
    }
}

impl wasmtime::component::HasData for WasmState {
    type Data<'a> = &'a mut WasmState;
}

impl WasiView for WasmState {
    fn ctx(&mut self) -> WasiCtxView<'_> {
        WasiCtxView {

View on GitHub (pinned to 5a9b9558db)

Solutions

1. Surface the full formatted string including extension name, version, and inner error to the user or logs — the root cause is the inner '{}` error
2. Reproduce with the extension's logs enabled to identify which extension API call failed
3. Update or disable the offending extension if the error persists

When it happens

Trigger: Thrown at crates/extension_host/src/wasm_host.rs:941 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of zed-industries/zed@5a9b9558db (2026-08-20). Data as JSON: /api/errors/7624dbb0df799251. Report an issue: GitHub.