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This error occurs when you defined methods or associated functions with same
name.
Erroneous code example:
```compile_fail,E0592
struct Foo;
impl Foo {
fn bar() {} // previous definition here
}
impl Foo {
fn bar() {} // duplicate definition here
}
```
A similar error is E0201. The difference is whether there is one declaration
block or not. To avoid this error, you must give each `fn` a unique name.
```
struct Foo;
impl Foo {
fn bar() {}
}
impl Foo {
fn baz() {} // define with different name
}
```
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