Fix E0075: Generator/Resume Point Cannot Exist in a Const Context

Wed, 22 Jul 2026 17:32:04 +0800

1. Symptoms

When the Rust compiler encounters E0075, you will see an error message similar to the following during compilation:

error[E0075]: generator/resume point cannot exist in a `const` context
 --> src/main.rs:5:5
  |
5 |     let result = gen.resume();
  |     ^^^^^^^^^^^^^^^^^^^^^^^^

The error indicates that a generator or coroutine’s .resume() method is being invoked in a context that the compiler treats as requiring compile-time evaluation. This typically manifests in const functions, const blocks, or during constant promotion scenarios. The compiler flag E0075 specifically targets the attempt to advance a generator’s state at a point where only compile-time computations are permitted.

E0075 on ErrorVault — Developer Error Code Dictionary

Fix E0075: Generator/Resume Point Cannot Exist in a Const Context

1. Symptoms