fix(pool): add timeout to return_to_pool()

Author: abonander

sqlx-core/src/pool/connection.rs

@@ -12,8 +12,10 @@ use crate::error::Error;
 use super::inner::{is_beyond_max_lifetime, PoolInner};
 use crate::pool::connect::{ConnectPermit, ConnectionId};
 use crate::pool::options::PoolConnectionMetadata;
+use crate::rt;
 use std::future::Future;
 
+const RETURN_TO_POOL_TIMEOUT: Duration = Duration::from_secs(5);
 const CLOSE_ON_DROP_TIMEOUT: Duration = Duration::from_secs(5);
 
 /// A connection managed by a [`Pool`][crate::pool::Pool].
@@ -149,7 +151,9 @@ impl<DB: Database> PoolConnection<DB> {
 
         async move {
             let returned_to_pool = if let Some(floating) = floating {
-                floating.return_to_pool().await
+                rt::timeout(RETURN_TO_POOL_TIMEOUT, floating.return_to_pool())
+                    .await
+                    .unwrap_or(false)
             } else {
                 false
             };