Merge pull request #143 from SergioBenitez/master

Transform blocks into `async move` for more compatibility

Cargo.toml

@@ -24,5 +24,8 @@ tracing-attributes = "0.1.8"
 tracing-futures = "0.2"
 trybuild = { version = "1.0.19", features = ["diff"] }
 
+[build-dependencies]
+version_check = "0.9"
+
 [package.metadata.docs.rs]
 targets = ["x86_64-unknown-linux-gnu"]

build.rs

@@ -0,0 +1,5 @@
+fn main() {
+    if let Some(true) = version_check::is_max_version("1.46") {
+        println!("cargo:rustc-cfg=self_span_hack");
+    }
+}