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An invalid number of arguments was passed when calling a function.
Erroneous code example:
```compile_fail,E0061
fn f(u: i32) {}
f(); // error!
```
The number of arguments passed to a function must match the number of arguments
specified in the function signature.
For example, a function like:
```
fn f(a: u16, b: &str) {}
```
Must always be called with exactly two arguments, e.g., `f(2, "test")`.
Note that Rust does not have a notion of optional function arguments or
variadic functions (except for its C-FFI).
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