fix(stream): Implement Error for OpenStreamError

Pull-Request: libp2p#5169.

Cargo.toml

@@ -101,7 +101,7 @@ libp2p-relay = { version = "0.17.1", path = "protocols/relay" }
 libp2p-rendezvous = { version = "0.14.0", path = "protocols/rendezvous" }
 libp2p-request-response = { version = "0.26.2", path = "protocols/request-response" }
 libp2p-server = { version = "0.12.6", path = "misc/server" }
-libp2p-stream = { version = "0.1.0-alpha", path = "protocols/stream" }
+libp2p-stream = { version = "0.1.0-alpha.1", path = "protocols/stream" }
 libp2p-swarm = { version = "0.44.2", path = "swarm" }
 libp2p-swarm-derive = { version = "=0.34.3", path = "swarm-derive" } # `libp2p-swarm-derive` may not be compatible with different `libp2p-swarm` non-breaking releases. E.g. `libp2p-swarm` might introduce a new enum variant `FromSwarm` (which is `#[non-exhaustive]`) in a non-breaking release. Older versions of `libp2p-swarm-derive` would not forward this enum variant within the `NetworkBehaviour` hierarchy. Thus the version pinning is required.
 libp2p-swarm-test = { version = "0.3.0", path = "swarm-test" }

protocols/stream/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.1.0-alpha.1
+- Implement Error for `OpenStreamError`.
+  See [PR 5169](https://github.com/libp2p/rust-libp2p/pull/5169).
+
 ## 0.1.0-alpha
 
 Initial release.

protocols/stream/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "libp2p-stream"
-version = "0.1.0-alpha"
+version = "0.1.0-alpha.1"
 edition = "2021"
 rust-version.workspace = true
 description = "Generic stream protocols for libp2p"

protocols/stream/src/control.rs

@@ -103,6 +103,15 @@ impl fmt::Display for OpenStreamError {
     }
 }
 
+impl std::error::Error for OpenStreamError {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        match self {
+            Self::Io(error) => Some(error),
+            _ => None,
+        }
+    }
+}
+
 /// A handle to inbound streams for a particular protocol.
 #[must_use = "Streams do nothing unless polled."]
 pub struct IncomingStreams {