unresolved name form_urlencoded::serialize [E0425]

[oleid]

I'm trying to compile google-drive3, but the build stops building one of it's dependencies -- yup-oauth2 -- using rustc-1.8 on debian testing. Any idea what might be wrong?

[cut1]/out/lib.rs:189:17: 189:43 error: unresolved name `form_urlencoded::serialize` [E0425]
[cut1]/out/lib.rs:189                 form_urlencoded::serialize(&[("client_id", client_id),
                                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
[cut0]//src/lib.rs:71:1: 71:47 note: in this expansion of include!
[cut1]/out/lib.rs:189:17: 189:43 help: run `rustc --explain E0425` to see a detailed explanation
[cut1]/out/lib.rs:588:17: 588:43 error: unresolved name `form_urlencoded::serialize` [E0425]
[cut1]/out/lib.rs:588                 form_urlencoded::serialize(&[("client_id", &self.id[..]),
                                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
[cut0]//src/lib.rs:71:1: 71:47 note: in this expansion of include!
[cut1]/out/lib.rs:588:17: 588:43 help: run `rustc --explain E0425` to see a detailed explanation
[cut1]/out/lib.rs:865:17: 865:43 error: unresolved name `form_urlencoded::serialize` [E0425]
[cut1]/out/lib.rs:865                 form_urlencoded::serialize(&[("client_id", client_id),
                                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
[cut0]//src/lib.rs:71:1: 71:47 note: in this expansion of include!
[cut1]/out/lib.rs:865:17: 865:43 help: run `rustc --explain E0425` to see a detailed explanation
[cut1]/out/lib.rs:194:160: 194:164 error: the type of this value must be known in this context
[cut1]/out/lib.rs:194                 match self.client.borrow_mut().post(FlowType::Device.as_ref()).header(ContentType("application/x-www-form-urlencoded".parse().unwrap())).body(&*req).send()
                                                                                                                                                                                    ^~~~
[cut0]//src/lib.rs:71:1: 71:47 note: in this expansion of include!
[cut1]/out/lib.rs:524:25: 524:58 error: the type of this value must be known in this context
[cut1]/out/lib.rs:524                         res.read_to_string(&mut json_str).unwrap();
                                              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[cut0]//src/lib.rs:71:1: 71:47 note: in this expansion of include!
[cut1]/out/lib.rs:594:151: 594:155 error: the type of this value must be known in this context
[cut1]/out/lib.rs:594                 match self.client.borrow_mut().post(GOOGLE_TOKEN_URL).header(ContentType("application/x-www-form-urlencoded".parse().unwrap())).body(&*req).send()
                                                                                                                                                                           ^~~~
[cut0]//src/lib.rs:71:1: 71:47 note: in this expansion of include!
[cut1]/out/lib.rs:602:25: 602:58 error: the type of this value must be known in this context
[cut1]/out/lib.rs:602                         res.read_to_string(&mut json_str).unwrap();
                                              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[cut0]//src/lib.rs:71:1: 71:47 note: in this expansion of include!
[cut1]/out/lib.rs:593:17: 593:25 error: the trait `core::marker::Sized` is not implemented for the type `str` [E0277]
[cut1]/out/lib.rs:593             let json_str =
                                      ^~~~~~~~
[cut0]//src/lib.rs:71:1: 71:47 note: in this expansion of include!
[cut1]/out/lib.rs:593:17: 593:25 help: run `rustc --explain E0277` to see a detailed explanation
[cut1]/out/lib.rs:593:17: 593:25 note: `str` does not have a constant size known at compile-time
[cut1]/out/lib.rs:593:17: 593:25 note: all local variables must have a statically known size
[cut1]/out/lib.rs:871:151: 871:155 error: the type of this value must be known in this context
[cut1]/out/lib.rs:871                 match self.client.borrow_mut().post(GOOGLE_TOKEN_URL).header(ContentType("application/x-www-form-urlencoded".parse().unwrap())).body(&*req).send()
                                                                                                                                                                           ^~~~
[cut0]//src/lib.rs:71:1: 71:47 note: in this expansion of include!
[cut1]/out/lib.rs:879:25: 879:58 error: the type of this value must be known in this context
[cut1]/out/lib.rs:879                         res.read_to_string(&mut json_str).unwrap();
                                              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[cut0]//src/lib.rs:71:1: 71:47 note: in this expansion of include!
[cut1]/out/lib.rs:870:17: 870:25 error: the trait `core::marker::Sized` is not implemented for the type `str` [E0277]
[cut1]/out/lib.rs:870             let json_str =
                                      ^~~~~~~~
[cut0]//src/lib.rs:71:1: 71:47 note: in this expansion of include!
[cut1]/out/lib.rs:870:17: 870:25 help: run `rustc --explain E0277` to see a detailed explanation
[cut1]/out/lib.rs:870:17: 870:25 note: `str` does not have a constant size known at compile-time
[cut1]/out/lib.rs:870:17: 870:25 note: all local variables must have a statically known size

[Byron]

So far, I have been seeing this issue only when trying to compile it directly - it used to work when doing it through google-apis-rs.

However, the issue is reproducible and must be fixed here. In short, it's related to requiring a specific version of serde to workaround a bug in serde-0.7 which causes most of the google-apis to abort compilation.
The serde-dependency turned out to be an absolute nightmare, and currently is way above my head.

[dermesser]

I think I know why this happens -- Cargo.toml says url >= 0.5, but there was an update to url recently, bumping to 1.0. This broke compatibility. I'm preparing a PR right now.