Fix E0107: Non-field Struct, Tuple, or Enum Variant

Sat, 01 Aug 2026 07:56:04 +0800

1. Symptoms

The Rust compiler emits error E0107 when attempting to access a field, tuple element, or enum variant that does not exist on the target type. The compiler generates a clear diagnostic message indicating which identifier is problematic and on which type it was attempted to be used.

Typical shell output for this error appears as follows:

error[E0107]: field is not a member of struct `MyStruct`
  --> src/main.rs:5:5
   |
5  |     println!("{}", my_struct.invalid_field);
   |                          ^^^^^^^^^^^^^^^^ field not found in struct `MyStruct`
   |
   = note: fields of `MyStruct` are: `name`, `age`

error[E0107]: variant `Inactive` is not a member of enum `Status`
  --> src/main.rs:12:12
   |
12 |     Status::Inactive => println!("Not active"),
   |            ^^^^^^^^ variant not found in enum `Status`
   |
   = note: variants of enum `Status` are: `Active`, `Pending`

When dealing with tuple structs, the error manifests slightly differently, often highlighting that the identifier being used is not a valid field name for that particular struct type. Tuple access attempts that use named identifiers instead of numeric indices will also trigger this error, since tuple elements are accessed by position, not by name.

E0107 on ErrorVault — Developer Error Code Dictionary

Fix E0107: Non-field Struct, Tuple, or Enum Variant

1. Symptoms