Fix E0636: Removed lints cannot be denied

Wed, 22 Jul 2026 12:44:04 +0800

1. Symptoms

When the Rust compiler encounters code that attempts to deny or allow a lint attribute that has been removed from the compiler, it produces error E0636. This error manifests during the compilation phase and prevents the code from building successfully.

The compiler output typically displays the error along with the specific lint name that is no longer recognized:

error[E0636]: this lint attribute has been removed
  |
  = help: the lint `old_lint_name` has been removed
  = note: see issue #12345 for more information

 --> src/main.rs:3:10
  |
3 | #[deny(old_lint_name)]
  |          ^^^^^^^^^^^^^^^ removed lint

In some cases, the error may also appear when using #[allow] instead of #[deny] on the deprecated lint. The compiler treats both deny and allow directives equally when the underlying lint has been removed, since the directive itself cannot be processed without a valid lint to target.

Attribute on ErrorVault — Developer Error Code Dictionary

Fix E0636: Removed lints cannot be denied

1. Symptoms