Fix E0711: Const Item Cannot Have a Destructor

Wed, 27 May 2026 19:56:04 +0800

1. Symptoms

When you attempt to create a const item with a type that implements Drop, the Rust compiler aborts with E0711.

error[E0711]: this is a `const` item, so it is part of the static lifetime and
               cannot have a destructor
  --> src/main.rs:5:1
   |
5  | const ITEM: SomeType = SomeType::new();
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: constants get deduplicated by the compiler, which is incompatible with Drop
help: consider using a `static` instead of a `const`
  |
12 | static ITEM: SomeType = SomeType::new();
   | ^^^^^^
---

The compiler explicitly tells you that:
1. Constants are part of the static lifetime
2. Constants get deduplicated (memory optimization)
3. Deduplication is incompatible with the `Drop` trait

A more specific error variant appears when the type implements `Drop` but the destructor never actually runs:

```console
error[E0711]: type `WrappingType` has a Drop impl, which is incompatible with const
  --> src/lib.rs:10:20
   |
10 | const VALUE: WrappingType = WrappingType { inner: 42 };
   |                    ^^^^^^^^^
   = note: `const` items may not have types that implement `Drop`

Common Error Variations

// Variation 1: Direct type with Drop
const MY_STRING: String = String::from("hello");
// error[E0711]: `String` doesn't implement `Copy`, and a const cannot have a `Drop` impl

// Variation 2: Struct with Drop impl
const MY_STRUCT: MyStruct = MyStruct { value: 0 };
// error[E0711]: this is a `const` item, so it is part of the static lifetime and cannot have a destructor

// Variation 3: Type alias to Drop type
type Alias = SomeDropType;
const THING: Alias = SomeDropType::new();
// error[E0711]: cannot have destructor

2. Root Cause

The E0711 error stems from fundamental differences between const and static items in Rust, combined with how Drop implementations work.

Drop on ErrorVault — Developer Error Code Dictionary

Fix E0711: Const Item Cannot Have a Destructor

1. Symptoms

Common Error Variations

2. Root Cause