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#### Note: this error code is no longer emitted by the compiler.
A `#[coverage(off|on)]` attribute was found in a position where it is not
allowed.
Coverage attributes can be applied to:
- Function and method declarations that have a body, including trait methods
that have a default implementation.
- Closure expressions, in situations where attributes can be applied to
expressions.
- `impl` blocks (inherent or trait), and modules.
Example of erroneous code:
```ignore (no longer emitted)
unsafe extern "C" {
#[coverage(off)]
fn foreign_fn();
}
```
When using the `-C instrument-coverage` flag, coverage attributes act as a
hint to the compiler that it should instrument or not instrument the
corresponding function or enclosed functions. The precise effect of applying
a coverage attribute is not guaranteed and may change in future compiler
versions.
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