Error map
feature edition2024 is required / Cargo.lock version too new Cargo: error: failed to parse manifest — feature `edition2024` is required / lock file version 4 requires `-Znext-lockfile-bump`
Rust · layer 4, Application & API
Centre: this error. First ring: errors it is linked with (12). 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.
Directly related (12)
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).
Rust: error[E0015]: cannot call non-const function `String::from` in constants
A `const`/`static` initializer used something that can't run at compile time.
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).
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.
Rust: error[E0425]: cannot find value `x` in this scope
The identifier (variable, function, constant) isn't defined where it's used.
Rust: error[E0282]: type annotations needed for `Vec<_>` / consider giving `x` an explicit type
The compiler can't infer a type from the available information.
Rust: error[E0381]: used binding `x` is possibly-uninitialized
A variable might be read before every code path assigned it.
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 `&`).
Rust: error[E0004]: non-exhaustive patterns: `None` not covered
A `match` doesn't handle every possible value of the type.
Rust: error[E0384]: cannot assign twice to immutable variable `x`
You reassigned a variable declared without `mut`.
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.
Rust: error[E0133]: call to unsafe function `foo` is unsafe and requires unsafe function or block
You called an `unsafe` function (or dereferenced a raw pointer / accessed a `static mut`) outside `unsafe`.
Two steps away (29)
C/C++: undefined reference to `pthread_create' — missing -pthread (also `dlopen`, `clock_gettime`)
Your program uses threads (or another system library) but the linker was not told to link it.
C++: terminate called without an active exception — std::thread destroyed while joinable
A `std::thread` object was destroyed (or reassigned) while its thread was still running, so the C++ runtime called `std::terminat…
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.
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…
C++: error: invalid conversion from 'const char*' to 'char*' [-fpermissive]
C++ forbids silently dropping `const` or converting between unrelated pointer types — typically a string literal assigned to `cha…
C++: error: passing 'const X' as 'this' argument discards qualifiers [-fpermissive]
A const object (or const reference) is calling a method that is not declared const, which could modify it.
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.
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.
Rust: thread 'main' panicked at src/main.rs:5:5: index out of bounds: the len is 3 but the index is 3
A Vec/array/slice was indexed past its length.
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.
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.
Rust: error[E0597]: `x` does not live long enough — borrowed value does not live long enough
A reference outlives the value it points to (the value is dropped first).
C++: error: 'x' was not declared in this scope (undeclared identifier)
The compiler met a name it has never seen: it is misspelled, declared later, out of scope, or its header or namespace is missing.
MSVC: error C2065: 'x': undeclared identifier
Visual C++ met a name it has not seen declared — a typo, a missing header or namespace, or use outside its scope.
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.
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`).
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: 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: 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).
Rust: error[E0382]: borrow of moved value: `x`
A value was moved (ownership transferred) and then used again.
Rust: error[E0596]: cannot borrow `v` as mutable, as it is not declared as mutable
You called a `&mut` method (or took `&mut`) on a binding/reference that isn't mutable.
Cargo: error: package `home v0.5.9` cannot be built because it requires rustc 1.81 or newer, while the currently active rustc version is 1.78.0
A dependency's minimum supported Rust version (MSRV) is higher than your toolchain.
rustup: error: toolchain 'nightly-x86_64-unknown-linux-gnu' is not installed / error: no override and no default toolchain set
rustup can't find the toolchain requested by `rust-toolchain.toml`, an override, or no default is set.
Rust: error[E0502]: cannot borrow `x` as mutable because it is also borrowed as immutable
You tried to mutate a value while an immutable reference to it is still in use.
C++: error: no matching function for call to 'f(int, const char*)'
No overload of the function accepts the arguments you passed — wrong count, wrong types, or a missing conversion.
Go: not enough arguments in call to f have (int) want (int, string)
A function was called with fewer or more arguments than it declares.
Rust: error[E0063]: missing field `age` in initializer of `User`
A struct literal doesn't set all fields.
Rust: error[E0658]: use of unstable library feature `let_chains` / `#![feature]` may not be used on the stable release channel
Your code uses a nightly-only feature on the stable toolchain.
Rust: error: linker `cc` not found — note: No such file or directory (os error 2)
Rust needs a C linker (gcc/clang) to produce executables, and none is installed.
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