crate syn removed export as never been part of the public API

qt_macro references syn::export that has been removed as never been part of the public API

Compilation of qt_macros fails due to the issue.

There are two places where it is called:

q_init_resource.rs, line 3, and used in line 19
slot.rs, line 3 and used in line 11 and line 15

In both cases, it should be possible to use proc_macro::Span instead of passing from export; however it is a nightly only feature.
Alternatively, there is the Span from proc_macro2 crate that offer the same functionalities outside of procedural macros (slot.rs should benefit?)

While we're waiting for this to get merged, the functioning syn version is 1.0.17, but is there a way to force its use?

ritual/qt_macros/Cargo.toml

Line 14 in 880490e

syn = { version = "1.0", features = ["full"] }

only requires v1.0 so the patch version shouldn't matter.

Edit:

So, with cargo update -p $package --precise $version it's possible to force the version of a dependency in Cargo.lock. To get things to work without the PR, here's a workaround

cargo update -p serde_derive --precise 1.0.105
cargo update -p serde --precise 1.0.105
cargo update -p syn --precise 1.0.17

Versions gleaned from the https://github.com/rust-qt/examples/blob/master/Cargo.lock