The not
cfg-predicate was malformed.
Erroneous code example:
#[cfg(not())] // error: expected 1 cfg-pattern
pub fn something() {}
pub fn main() {}
RunThe not
predicate expects one cfg-pattern. Example:
#[cfg(not(target_os = "linux"))] // ok!
pub fn something() {}
pub fn main() {}
RunFor more information about the cfg
attribute, read the section on
Conditional Compilation in the Reference.