Version 0.17.12 makes things no longer Send

[sophie-h]

Ideally, the version should be retracted since it stops code from building after updating from .11 to .12.

(Also, there is no tag for .12 in the repo)

My build error is the following

error[E0277]: `(dyn for<'a, 'b, 'c, 'd> Fn(&'a [u8], &'b mut [u8], &'c png::common::Info<'d>) + 'static)` cannot be sent between threads safely
   --> loaders/glycin-image-rs/src/bin/glycin-image-rs.rs:116:31
    |
116 | impl LoaderImplementation for ImgDecoder {
    |                               ^^^^^^^^^^ `(dyn for<'a, 'b, 'c, 'd> Fn(&'a [u8], &'b mut [u8], &'c png::common::Info<'d>) + 'static)` cannot be sent between threads safely
    |
    = help: the trait `Send` is not implemented for `(dyn for<'a, 'b, 'c, 'd> Fn(&'a [u8], &'b mut [u8], &'c png::common::Info<'d>) + 'static)`
    = note: required for `Unique<(dyn for<'a, 'b, 'c, 'd> Fn(&'a [u8], &'b mut [u8], &'c png::common::Info<'d>) + 'static)>` to implement `Send`
note: required because it appears within the type `Box<dyn Fn(&[u8], &mut [u8], &Info<'d>)>`
   --> /home/herold/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/alloc/src/boxed.rs:195:12
    |
195 | pub struct Box<
    |            ^^^
note: required because it appears within the type `Option<Box<dyn Fn(&[u8], &mut [u8], &Info<'d>)>>`
   --> /home/herold/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/option.rs:569:10
    |
569 | pub enum Option<T> {
    |          ^^^^^^
note: required because it appears within the type `Reader<Cursor<Vec<u8>>>`
   --> /home/herold/.cargo/registry/src/index.crates.io-6f17d22bba15001f/png-0.17.12/src/decoder/mod.rs:356:12
    |
356 | pub struct Reader<R: Read> {
    |            ^^^^^^
note: required because it appears within the type `PngDecoder<Cursor<Vec<u8>>>`
   --> /home/herold/.cargo/registry/src/index.crates.io-6f17d22bba15001f/image-0.24.8/src/codecs/png.rs:112:12
    |
112 | pub struct PngDecoder<R: Read> {
    |            ^^^^^^^^^^
note: required because it appears within the type `ImageRsDecoder<Cursor<Vec<u8>>>`
   --> loaders/glycin-image-rs/src/bin/glycin-image-rs.rs:158:10

[fintelia]

Could you confirm whether #471 fixes things for you? If so, I'll release a version with that change and then yank 0.17.12.

[sophie-h]

Yep, that fixes it, thanks a lot!