Error map

E0282: type annotations needed Rust: error[E0282]: type annotations needed for `Vec<_>` / consider giving `x` an explicit type

Rust · layer 4, Application & API

Centre: this error. First ring: errors it is linked with (9). Outer ring: what those are linked with. Colours show the layer of a request each error belongs to. Click any dot to re-centre the map on it; hover to follow its connections. The centre dot opens the error page.

4 · Application & API 6 · Platform & cloud

Directly related (9)

E0308Rust

Rust: error[E0308]: mismatched types — expected `X`, found `Y`

A value’s type doesn’t match what the context expects — common with &str vs String, Option/Result vs plain values, and integer ty…

E0277: the trait bound is not satisfiedRust

Rust: error[E0277]: the trait bound `Foo: Display` is not satisfied / `Rc<RefCell<T>>` cannot be sent between threads safely

A type doesn't implement a trait required by a function, macro or generic bound.

E0599: no method named found for typeRust

Rust: error[E0599]: no method named `push_str` found for struct `Vec<String>` in the current scope

The type doesn't have that method — wrong type, trait not in scope, or missing derive/feature.

feature edition2024 is required / Cargo.lock version too newRust

Cargo: error: failed to parse manifest — feature `edition2024` is required / lock file version 4 requires `-Znext-lockfile-bump`

Your Cargo is older than the manifest or lockfile requires.

Blocking waiting for file lock on package cache / build directoryRust

Cargo: Blocking waiting for file lock on package cache / on build directory

Another cargo process (or rust-analyzer/IDE) holds the lock, so this command waits.

E0038: the trait cannot be made into an objectRust

Rust: error[E0038]: the trait `Shape` cannot be made into an object (not dyn compatible)

You used `dyn Trait` for a trait whose methods aren't object-safe (generic methods, `Self` returns, `Sized`).

E0271: type mismatch resolving associated typeRust

Rust: error[E0271]: type mismatch resolving `<impl Iterator as Iterator>::Item == i32`

A trait's associated type (Iterator::Item, Future::Output) doesn't match what's expected.

cargo: failed to select a version for the requirementRust

Cargo: error: failed to select a version for the requirement `serde = "^2.0"` — candidate versions found which didn't match: 1.0.197

Cargo can't find a version of a dependency satisfying the constraints you (or other crates) set.

cargo: failed to get from registry (spurious network error)Rust

Cargo: warning: spurious network error (2 tries remaining): [35] SSL connect error / error: failed to download from `https://index.crates.io/...`

Cargo couldn't reach crates.io (network, proxy, TLS or DNS issues).

Two steps away (24)

AttributeErrorPython

AttributeError: 'X' object has no attribute 'y'

You accessed an attribute or method that doesn’t exist on that object type.

ClassCastExceptionJava

java.lang.ClassCastException: class A cannot be cast to class B

An object was cast to a type it isn’t.

TS7016Node.js

TS7016: Could not find a declaration file for module 'x'. 'x.js' implicitly has an 'any' type.

The JavaScript package has no TypeScript types bundled and no @types package installed.

E0004: non-exhaustive patternsRust

Rust: error[E0004]: non-exhaustive patterns: `None` not covered

A `match` doesn't handle every possible value of the type.

E0061: this function takes N arguments but M were suppliedRust

Rust: error[E0061]: this function takes 2 arguments but 1 argument was supplied

A call has too few or too many arguments for the function signature.

E0369: binary operation cannot be applied to typeRust

Rust: error[E0369]: binary operation `+` cannot be applied to type `Foo` / cannot add `&str` to `&str`

An operator (`+`, `==`, `

E0425: cannot find value in this scopeRust

Rust: error[E0425]: cannot find value `x` in this scope

The identifier (variable, function, constant) isn't defined where it's used.

E0432: unresolved importRust

Rust: error[E0432]: unresolved import `crate::utils` — maybe a missing crate `utils`?

A `use` path doesn't point to an existing module, crate or item.

E0608: cannot index into a value of typeRust

Rust: error[E0608]: cannot index into a value of type `HashSet<i32>` / `String` cannot be indexed by `{integer}`

The type doesn't support `[]` indexing (or not with that index type).

E0507: cannot move out of a shared reference / indexRust

Rust: error[E0507]: cannot move out of `self.name` which is behind a shared reference

You tried to take ownership of a value through a reference (or from a Vec/Option behind `&`).

E0373: closure may outlive the current functionRust

Rust: error[E0373]: closure may outlive the current function, but it borrows `v`, which is owned by the current function

A closure borrowing a local is passed somewhere that may outlive it (thread::spawn, tokio::spawn, returned closures).

E0384: cannot assign twice to immutable variableRust

Rust: error[E0384]: cannot assign twice to immutable variable `x`

You reassigned a variable declared without `mut`.

E0499: cannot borrow as mutable more than once at a timeRust

Rust: error[E0499]: cannot borrow `v` as mutable more than once at a time

Two mutable references to the same value were alive at once, which Rust forbids.

E0505: cannot move out of value because it is borrowedRust

Rust: error[E0505]: cannot move out of `s` because it is borrowed

You moved a value while a reference to it was still in use.

E0106: missing lifetime specifierRust

Rust: error[E0106]: missing lifetime specifier — this function's return type contains a borrowed value, but the signature does not say which one of `x`'s 2 lifetimes it is borrowed from

The compiler can't infer which input reference the returned/stored reference is tied to.

invalid conversion fromC/C++