Struct field lifetime error and misleading error message.

[nulldatamap]

The following code results in a misleading error message and is not intended behaviour.

pub struct Wowser<'a> {
  wow : &'a mut str,
}

impl<'a> Wowser<'a> {
  pub fn new( wowling : &'a mut str ) -> Wowser<'a> {
    Wowser{ wow: wowling }
  }
}

Error:

error: mismatched types: expected `&mut str`, found `&'a mut str` (values differ in mutability)
     Wowser{ wow: wowling }
                  ^~~~~~~

Passing a new lifetime to the function will result in the same error:

pub fn new<'b>( wowling : &'b mut str ) -> Wowser<'b> {

[steveklabnik]

This example now compiles.