Error Compiling Default String Field With Bytes

[dharesign]

I'm using protobuf-codegen-pure = "2.3", and running into the following issue.

Given foo.proto:

message Foo {
    optional string bar = 1 [default = "test"];
}

The generated foo.rs:

impl Foo {
    pub fn mut_bar(&mut self) -> &mut ::protobuf::Chars {
        if self.bar.is_none() {
            self.bar = ::std::option::Option::Some("test");
        }
        self.bar.as_mut().unwrap()
    }
}

Fails to compile:

error[E0308]: mismatched types
  --> src/foo.rs:57:52
   |
57 |             self.bar = ::std::option::Option::Some("test");
   |                                                    ^^^^^^ expected struct `protobuf::chars::Chars`, found reference
   |
   = note: expected type `protobuf::chars::Chars`
              found type `&'static str`

[stepancheg]

Published fix as 2.3.1.

Thank you for the bugreport!