ErrLookup › neon-bindings/neon

neon-bindings/neon

Rust bindings for writing safe and fast native Node.js modules. · Rust · 110 source files

Analyzed at 38960e4381 on 2026-09-13. 47 documented errors.

Code / Message	Type	Severity	Tags
Expected an owned `Channel` instead of a context reference.	validation	error	rust, proc-macro, neon, async, channel, compile-time
Context must be a `&mut` reference.	validation	error	rust, neon, proc-macro, constructor, type-mismatch
Context is not available in async functions. Try a…	validation	error	rust, proc-macro, neon, async, channel, compile-time
Constructor cannot have a `self` receiver	validation	error	rust, neon, proc-macro, constructor, signature
class must be implemented for a type name	panic	error	rust, macros, neon, compile-time
Expected a context argument. Try removing the `context`…	validation	error	rust, neon, proc-macro, constructor, missing-argument
Failed to unwrap napi_external as Box	panic	error
Expected `&mut Cx` instead of a `Channel` reference.	validation	error	rust, neon, compile-time, macro, napi
u32 overflow ocurred in Lifecycle InstanceId	panic	error	rust, neon, overflow, workers
Unexpected second receiver argument.	validation	error	rust, proc-macro, neon, signature, compile-time
Failed to find N-API version	panic	error
Attempted to settle JsFuture multiple times	panic	error
Expected an owned `Channel` instead of a reference.	validation	error	rust, neon, compile-time, macro, async
Attempted to dereference a `neon::handle::Root` from the…	panic	error	rust, neon, workers, lifecycle
Must be a `&mut` reference.	validation	error	rust, neon, compile-time, macro, context-argument
expected JsBuffer	validation	error	rust, neon, arraybuffer, extraction, type-error
Node-API symbol has not been loaded	panic	critical	rust, neon, node-api, linking
attempt to reinitialize Local during initialization	panic	error	rust, neon, initialization, thread-local
Cannot combine `async fn` with `#[neon(async)]` attribute	validation	error	rust, proc-macro, neon, async, attribute-conflict, compile-time
expected JsTypedArray	validation	error	rust, neon, typedarray, extraction, type-error
Expected a context argument after `&self` when using…	validation	error	rust, proc-macro, neon, context, compile-time
Must settle a `neon::types::JsPromise` with…	panic	error	rust, neon, promises, async
Failed to load N-API symbols	panic	error
try_catch: unexpected Err(Throw) when VM is not in a…	panic	error	rust, neon, panics, internals
Must call `into_inner` or `drop` on `neon::handle::Root`	panic	error	rust, neon, memory-leak, lifecycle
Only one `new` constructor is allowed in a class.	validation	error	rust, neon, proc-macro, constructor, duplicate
Failed to generate a Neon module type tag	panic	error
Context parameters must be a `&mut` reference. Try `&mut…	validation	error	rust, neon, compile-time, macro, napi
in classes must take `self` by value, not `&self` or `&mut…	validation	error	rust, neon, macros, async, self-receiver
Unexpected `Channel` in sync method. Use `&mut…	validation	error	rust, neon, compile-time, macro, async
>= i32::MAX	panic	error	rust, neon, strings, limits
Exported functions cannot receive `self`.	validation	error	rust, neon, macros, export, self-receiver
Unknown class attribute	validation	error	rust, proc-macro, neon, attribute-parsing
Failed to downcast Any	panic	error
Class methods must have a `self` receiver (`&self` or `&mut…	validation	error	rust, neon, macros, self-receiver, method-signature
The `neon::main` macro must only be used once	panic	error	rust, neon, macros, module-init
in classes must take `self` as their first parameter.	validation	error	rust, neon, macros, async, missing-self
Unknown attribute	validation	error	rust, proc-macro, neon, attribute-parsing
Cannot combine async method with `#[neon(task)]` attribute	validation	error	rust, neon, macros, async, attribute-conflict
`neon::export` can only be applied to functions, consts…	validation	error	rust, neon, macros, export, unsupported-item
Expected `&mut Cx` instead of `Channel`.	validation	error	rust, neon, proc-macro, type-mismatch
Expected type name	validation	error	rust, proc-macro, neon, self-type, compile-time
Only one `finalize` method is allowed in a class.	validation	error	rust, proc-macro, neon, duplicate-method, compile-time
Constructor methods cannot have a `self` receiver	validation	error	rust, neon, macros, constructor, self-receiver
Expected 'class' in export attribute	validation	error	rust, proc-macro, neon, attribute-syntax, compile-time
Class export can only be applied to named types	validation	error	rust, proc-macro, neon, self-type, compile-time
`neon::class` can only contain `const` and `fn` items.	validation	error	rust, proc-macro, neon, unsupported-item, compile-time