http-service v0.2.0 fails to build on rustc 1.36.0-nightly (08bfe1612 2019-05-02)

[fairingrey]

Pretty unusual from the looks of it, seems to be a nightly regression?

 allen@harumi  ~/Projects/http-service   master  cargo build
   Compiling http-service v0.2.0 (/home/allen/Projects/http-service)
error[E0596]: cannot borrow `self` as mutable, as it is not declared as mutable
   --> src/lib.rs:102:40
    |
100 |     pub async fn into_vec(mut self) -> std::io::Result<Vec<u8>> {
    |                           -------- help: consider changing this to be mutable: `mut self`
101 |         let mut bytes = Vec::new();
102 |         while let Some(chunk) = await!(self.next()) {
    |                                        ^^^^ cannot borrow as mutable

warning: variable does not need to be mutable
   --> src/lib.rs:100:27
    |
100 |     pub async fn into_vec(mut self) -> std::io::Result<Vec<u8>> {
    |                           ----^^^^
    |                           |
    |                           help: remove this `mut`
    |
    = note: #[warn(unused_mut)] on by default

error: aborting due to previous error

For more information about this error, try `rustc --explain E0596`.
error: Could not compile `http-service`.

To learn more, run the command again with --verbose.

Something goes weird when trying to consume mut self, perhaps related to async?

Will install an earlier version of nightly to make sure stuff works, but just wanted to share since this breaks Tide and other related crates.

[fairingrey]

related to rust-lang/rust#60498

[fairingrey]

Builds on rustc 1.36.0-nightly (a3404557c 2019-05-03), closing