Fix E0714: Destructors Cannot Be Evaluated at Constant Expression Compilation

Fri, 07 Aug 2026 15:08:04 +0800

1. Symptoms

The Rust compiler emits error E0714 when you attempt to use a pattern involving types with destructors in a const or static item context where the destructor cannot be evaluated at compile time. The error manifests with a clear diagnostic message indicating that destructors are forbidden during constant evaluation.

When you encounter this error, the compiler produces output similar to the following:

error[E0714]: destructors cannot be evaluated at constant expression compilation
  --> src/main.rs:6:13
   |
6  | const VALUE: Option<Box<i32>> = Some(Box::new(42));
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: this error occurs in the expansion of static item initialization

The error points to the exact line where the problematic pattern appears, and the note clarifies that the issue occurs during static item initialization. In more complex scenarios involving tuple destructuring, you might see additional context about which part of the pattern triggered the evaluation:

Pattern on ErrorVault — Developer Error Code Dictionary

Fix E0714: Destructors Cannot Be Evaluated at Constant Expression Compilation

1. Symptoms