Fix E0618: Expected Item, Found Error

Fri, 24 Jul 2026 05:32:04 +0800

1. Symptoms

When the Rust compiler encounters error E0618, you will see an error message similar to the following in your build output:

error[E0618]: expected item, found error
 --> src/main.rs:5:1
  |
5 | let x = 5;
| ^^^^^^^^^^^^ expected item

error: aborting due to 1 previous error

The error message indicates that the compiler expected to find a valid top-level item declaration at the specified location, but instead encountered something it could not interpret as an item. The caret (^) points to the problematic code, and the compiler explicitly states what it found versus what it expected.

Fix E0774: extern declarations cannot be used in functions

Wed, 06 May 2026 12:44:04 +0800

1. Symptoms

When you attempt to compile Rust code containing an extern declaration inside a function body, the compiler emits error E0774:

error[E0774]: `extern` declarations cannot be used in functions
  --> src/main.rs:5:5
   |
5  |     extern crate some_crate;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `extern` declarations are only allowed in the crate root

The error manifests with these characteristics:

The compiler explicitly states that extern declarations are only allowed in the crate root
The error is flagged at compile time, not runtime
Placing extern inside any function scope triggers this error
The error appears regardless of whether the function is async, const, or a regular function

Example of code that triggers E0774:

Crate on ErrorVault — Developer Error Code Dictionary

Fix E0618: Expected Item, Found Error

1. Symptoms

Fix E0774: extern declarations cannot be used in functions

1. Symptoms