Fix new warnings causing CI build failures on rustc beta

lightning-block-sync/src/init.rs

@@ -252,8 +252,6 @@ mod tests {
 	use crate::test_utils::{Blockchain, MockChainListener};
 	use super::*;
 
-	use bitcoin::network::constants::Network;
-
 	#[tokio::test]
 	async fn sync_from_same_chain() {
 		let chain = Blockchain::default().with_height(4);

lightning-invoice/src/de.rs

@@ -1,5 +1,6 @@
 #[cfg(feature = "std")]
 use std::error;
+#[cfg(not(feature = "std"))]
 use core::convert::TryFrom;
 use core::fmt;
 use core::fmt::{Display, Formatter};

lightning-invoice/src/utils.rs

@@ -19,6 +19,7 @@ use secp256k1::PublicKey;
 use alloc::collections::{btree_map, BTreeMap};
 use core::ops::Deref;
 use core::time::Duration;
+#[cfg(not(feature = "std"))]
 use core::iter::Iterator;
 
 /// Utility to create an invoice that can be paid to one of multiple nodes, or a "phantom invoice."

lightning-invoice/tests/ser_de.rs

@@ -8,9 +8,6 @@ use bitcoin::address::WitnessVersion;
 use bitcoin::{PubkeyHash, ScriptHash};
 use bitcoin::hashes::hex::FromHex;
 use bitcoin::hashes::{sha256, Hash};
-use lightning::ln::PaymentSecret;
-use lightning::routing::gossip::RoutingFees;
-use lightning::routing::router::{RouteHint, RouteHintHop};
 use lightning_invoice::*;
 use secp256k1::PublicKey;
 use secp256k1::ecdsa::{RecoverableSignature, RecoveryId};

lightning-net-tokio/src/lib.rs

@@ -208,7 +208,12 @@ impl Connection {
 						break Disconnect::CloseConnection;
 					}
 				},
-				SelectorOutput::B(_) => {},
+				SelectorOutput::B(some) => {
+					// The mpsc Receiver should only return `None` if the write side has been
+					// dropped, but that shouldn't be possible since its referenced by the Self in
+					// `us`.
+					debug_assert!(some.is_some());
+				},
 				SelectorOutput::C(res) => {
 					if res.is_err() { break Disconnect::PeerDisconnected; }
 					match reader.try_read(&mut buf) {
@@ -556,7 +561,6 @@ mod tests {
 	use lightning::ln::features::*;
 	use lightning::ln::msgs::*;
 	use lightning::ln::peer_handler::{MessageHandler, PeerManager};
-	use lightning::ln::features::NodeFeatures;
 	use lightning::routing::gossip::NodeId;
 	use lightning::events::*;
 	use lightning::util::test_utils::TestNodeSigner;

lightning-persister/src/fs_store.rs

@@ -379,7 +379,6 @@ mod tests {
 	use lightning::ln::functional_test_utils::*;
 	use lightning::util::test_utils;
 	use lightning::util::persist::read_channel_monitors;
-	use std::fs;
 	use std::str::FromStr;
 
 	impl Drop for FilesystemStore {

lightning-rapid-gossip-sync/src/processing.rs

@@ -19,7 +19,7 @@ use crate::{GraphSyncError, RapidGossipSync};
 #[cfg(all(feature = "std", not(test)))]
 use std::time::{SystemTime, UNIX_EPOCH};
 
-#[cfg(not(feature = "std"))]
+#[cfg(all(not(feature = "std"), not(test)))]
 use alloc::{vec::Vec, borrow::ToOwned};
 
 /// The purpose of this prefix is to identify the serialization format, should other rapid gossip

lightning/src/blinded_path/message.rs

@@ -1,12 +1,14 @@
 use bitcoin::secp256k1::{self, PublicKey, Secp256k1, SecretKey};
 
+#[allow(unused_imports)]
+use crate::prelude::*;
+
 use crate::blinded_path::{BlindedHop, BlindedPath};
 use crate::blinded_path::utils;
 use crate::io;
 use crate::io::Cursor;
 use crate::ln::onion_utils;
 use crate::onion_message::packet::ControlTlvs;
-use crate::prelude::*;
 use crate::sign::{NodeSigner, Recipient};
 use crate::crypto::streams::ChaChaPolyReadAdapter;
 use crate::util::ser::{FixedLengthReader, LengthReadableArgs, Writeable, Writer};

lightning/src/blinded_path/payment.rs

@@ -12,10 +12,10 @@ use crate::ln::channelmanager::CounterpartyForwardingInfo;
 use crate::ln::features::BlindedHopFeatures;
 use crate::ln::msgs::DecodeError;
 use crate::offers::invoice::BlindedPayInfo;
-use crate::prelude::*;
 use crate::util::ser::{HighZeroBytesDroppedBigSize, Readable, Writeable, Writer};
 
-use core::convert::TryFrom;
+#[allow(unused_imports)]
+use crate::prelude::*;
 
 /// An intermediate node, its outbound channel, and relay parameters.
 #[derive(Clone, Debug)]

lightning/src/blinded_path/utils.rs

@@ -23,6 +23,8 @@ use crate::crypto::streams::ChaChaPolyWriteAdapter;
 use crate::util::ser::{Readable, Writeable};
 
 use crate::io;
+
+#[allow(unused_imports)]
 use crate::prelude::*;
 
 // TODO: DRY with onion_utils::construct_onion_keys_callback

lightning/src/chain/chaininterface.rs

@@ -14,7 +14,8 @@
 //! disconnections, transaction broadcasting, and feerate information requests.
 
 use core::{cmp, ops::Deref};
-use core::convert::TryInto;
+
+use crate::prelude::*;
 
 use bitcoin::blockdata::transaction::Transaction;
 

lightning/src/chain/channelmonitor.rs

@@ -53,10 +53,11 @@ use crate::util::byte_utils;
 use crate::events::{ClosureReason, Event, EventHandler};
 use crate::events::bump_transaction::{AnchorDescriptor, BumpTransactionEvent};
 
+#[allow(unused_imports)]
 use crate::prelude::*;
+
 use core::{cmp, mem};
 use crate::io::{self, Error};
-use core::convert::TryInto;
 use core::ops::Deref;
 use crate::sync::{Mutex, LockTestExt};
 
@@ -4765,6 +4766,8 @@ mod tests {
 	use crate::sync::{Arc, Mutex};
 	use crate::io;
 	use crate::ln::features::ChannelTypeFeatures;
+
+	#[allow(unused_imports)]
 	use crate::prelude::*;
 
 	use std::str::FromStr;

lightning/src/chain/mod.rs

@@ -21,6 +21,7 @@ use crate::ln::ChannelId;
 use crate::sign::ecdsa::WriteableEcdsaChannelSigner;
 use crate::chain::transaction::{OutPoint, TransactionData};
 
+#[allow(unused_imports)]
 use crate::prelude::*;
 
 pub mod chaininterface;

lightning/src/chain/package.rs

@@ -35,12 +35,13 @@ use crate::util::logger::Logger;
 use crate::util::ser::{Readable, Writer, Writeable, RequiredWrapper};
 
 use crate::io;
-use crate::prelude::*;
 use core::cmp;
-use core::convert::TryInto;
 use core::mem;
 use core::ops::Deref;
 
+#[allow(unused_imports)]
+use crate::prelude::*;
+
 use super::chaininterface::LowerBoundedFeeEstimator;
 
 const MAX_ALLOC_SIZE: usize = 64*1024;

lightning/src/crypto/chacha20.rs

@@ -12,7 +12,6 @@
 #[cfg(not(fuzzing))]
 mod real_chacha {
 	use core::cmp;
-	use core::convert::TryInto;
 
 	#[derive(Clone, Copy, PartialEq, Eq)]
 	#[allow(non_camel_case_types)]
@@ -335,11 +334,10 @@ pub use self::fuzzy_chacha::ChaCha20;
 
 #[cfg(test)]
 mod test {
-	use alloc::vec;
-	use alloc::vec::{Vec};
-	use core::convert::TryInto;
 	use core::iter::repeat;
 
+	use crate::prelude::*;
+
 	use super::ChaCha20;
 
 	#[test]

lightning/src/crypto/poly1305.rs

@@ -8,7 +8,8 @@
 // https://github.com/floodyberry/poly1305-donna
 
 use core::cmp::min;
-use core::convert::TryInto;
+
+use crate::prelude::*;
 
 #[derive(Clone, Copy)]
 pub struct Poly1305 {
@@ -206,7 +207,6 @@ impl Poly1305 {
 #[cfg(test)]
 mod test {
 	use core::iter::repeat;
-	use alloc::vec::Vec;
 
 	use super::Poly1305;
 

lightning/src/events/mod.rs

@@ -38,11 +38,13 @@ use bitcoin::hashes::Hash;
 use bitcoin::hashes::sha256::Hash as Sha256;
 use bitcoin::secp256k1::PublicKey;
 use crate::io;
-use crate::prelude::*;
 use core::time::Duration;
 use core::ops::Deref;
 use crate::sync::Arc;
 
+#[allow(unused_imports)]
+use crate::prelude::*;
+
 /// Some information provided on receipt of payment depends on whether the payment received is a
 /// spontaneous payment or a "conventional" lightning payment that's paying an invoice.
 #[derive(Clone, Debug, PartialEq, Eq)]

lightning/src/lib.rs

@@ -165,11 +165,17 @@ mod io_extras {
 }
 
 mod prelude {
+	#![allow(unused_imports)]
+
 	pub use alloc::{vec, vec::Vec, string::String, collections::VecDeque, boxed::Box};
 
 	pub use alloc::borrow::ToOwned;
 	pub use alloc::string::ToString;
 
+	pub use core::convert::{AsMut, AsRef, TryFrom, TryInto};
+	pub use core::default::Default;
+	pub use core::marker::Sized;
+
 	pub(crate) use crate::util::hash_tables::*;
 }
 

lightning/src/ln/chan_utils.rs

@@ -37,7 +37,6 @@ use bitcoin::{secp256k1, Sequence, Witness};
 use bitcoin::PublicKey as BitcoinPublicKey;
 
 use crate::io;
-use crate::prelude::*;
 use core::cmp;
 use crate::ln::chan_utils;
 use crate::util::transaction_utils::sort_outputs;
@@ -48,6 +47,9 @@ use crate::ln::features::ChannelTypeFeatures;
 use crate::crypto::utils::{sign, sign_with_aux_rand};
 use super::channel_keys::{DelayedPaymentBasepoint, DelayedPaymentKey, HtlcKey, HtlcBasepoint, RevocationKey, RevocationBasepoint};
 
+#[allow(unused_imports)]
+use crate::prelude::*;
+
 /// Maximum number of one-way in-flight HTLC (protocol-level value).
 pub const MAX_HTLCS: u16 = 483;
 /// The weight of a BIP141 witnessScript for a BOLT3's "offered HTLC output" on a commitment transaction, non-anchor variant.
@@ -1812,7 +1814,6 @@ pub fn get_commitment_transaction_number_obscure_factor(
 mod tests {
 	use super::{CounterpartyCommitmentSecrets, ChannelPublicKeys};
 	use crate::chain;
-	use crate::prelude::*;
 	use crate::ln::chan_utils::{get_htlc_redeemscript, get_to_countersignatory_with_anchors_redeemscript, CommitmentTransaction, TxCreationKeys, ChannelTransactionParameters, CounterpartyChannelTransactionParameters, HTLCOutputInCommitment};
 	use bitcoin::secp256k1::{PublicKey, SecretKey, Secp256k1};
 	use crate::util::test_utils;
@@ -1825,6 +1826,9 @@ mod tests {
 	use bitcoin::PublicKey as BitcoinPublicKey;
 	use crate::ln::features::ChannelTypeFeatures;
 
+	#[allow(unused_imports)]
+	use crate::prelude::*;
+
 	struct TestCommitmentTxBuilder {
 		commitment_number: u64,
 		holder_funding_pubkey: PublicKey,

lightning/src/ln/channel.rs

@@ -50,7 +50,6 @@ use crate::util::scid_utils::scid_from_parts;
 use crate::io;
 use crate::prelude::*;
 use core::{cmp,mem,fmt};
-use core::convert::TryInto;
 use core::ops::Deref;
 #[cfg(any(test, fuzzing, debug_assertions))]
 use crate::sync::Mutex;

lightning/src/ln/features.rs

@@ -78,8 +78,10 @@
 //! [BOLT #9]: https://github.com/lightning/bolts/blob/master/09-features.md
 //! [messages]: crate::ln::msgs
 
-use crate::{io, io_extras};
+#[allow(unused_imports)]
 use crate::prelude::*;
+
+use crate::{io, io_extras};
 use core::{cmp, fmt};
 use core::borrow::Borrow;
 use core::hash::{Hash, Hasher};
@@ -91,6 +93,7 @@ use crate::ln::msgs::DecodeError;
 use crate::util::ser::{Readable, WithoutLength, Writeable, Writer};
 
 mod sealed {
+	#[allow(unused_imports)]
 	use crate::prelude::*;
 	use crate::ln::features::Features;
 

lightning/src/ln/functional_tests.rs

@@ -49,12 +49,9 @@ use bitcoin::OutPoint as BitcoinOutPoint;
 use bitcoin::secp256k1::Secp256k1;
 use bitcoin::secp256k1::{PublicKey,SecretKey};
 
-use regex;
-
 use crate::io;
 use crate::prelude::*;
 use alloc::collections::BTreeSet;
-use core::default::Default;
 use core::iter::repeat;
 use bitcoin::hashes::Hash;
 use crate::sync::{Arc, Mutex, RwLock};

lightning/src/ln/inbound_payment.rs

@@ -9,7 +9,6 @@
 
 //! Utilities to generate inbound payment information in service of invoice creation.
 
-use alloc::string::ToString;
 use bitcoin::hashes::{Hash, HashEngine};
 use bitcoin::hashes::cmp::fixed_time_eq;
 use bitcoin::hashes::hmac::{Hmac, HmacEngine};
@@ -23,7 +22,9 @@ use crate::crypto::utils::hkdf_extract_expand_5x;
 use crate::util::errors::APIError;
 use crate::util::logger::Logger;
 
-use core::convert::{TryFrom, TryInto};
+#[allow(unused_imports)]
+use crate::prelude::*;
+
 use core::ops::Deref;
 
 pub(crate) const IV_LEN: usize = 16;

lightning/src/ln/mod.rs

@@ -126,7 +126,9 @@ impl From<PaymentPreimage> for PaymentHash {
 #[derive(Hash, Copy, Clone, PartialEq, Eq, Debug, Ord, PartialOrd)]
 pub struct PaymentSecret(pub [u8; 32]);
 
+#[allow(unused_imports)]
 use crate::prelude::*;
+
 use bitcoin::bech32;
 use bitcoin::bech32::{Base32Len, FromBase32, ToBase32, WriteBase32, u5};
 

lightning/src/ln/msgs.rs

@@ -38,9 +38,9 @@ use crate::ln::onion_utils;
 use crate::onion_message;
 use crate::sign::{NodeSigner, Recipient};
 
+#[allow(unused_imports)]
 use crate::prelude::*;
-#[cfg(feature = "std")]
-use core::convert::TryFrom;
+
 use core::fmt;
 use core::fmt::Debug;
 use core::ops::Deref;
@@ -1673,11 +1673,13 @@ pub struct FinalOnionHopData {
 mod fuzzy_internal_msgs {
 	use bitcoin::secp256k1::PublicKey;
 	use crate::blinded_path::payment::{PaymentConstraints, PaymentRelay};
-	use crate::prelude::*;
 	use crate::ln::{PaymentPreimage, PaymentSecret};
 	use crate::ln::features::BlindedHopFeatures;
 	use super::{FinalOnionHopData, TrampolineOnionPacket};
 
+	#[allow(unused_imports)]
+	use crate::prelude::*;
+
 	// These types aren't intended to be pub, but are exposed for direct fuzzing (as we deserialize
 	// them from untrusted input):
 
@@ -3163,7 +3165,6 @@ impl_writeable_msg!(GossipTimestampFilter, {
 
 #[cfg(test)]
 mod tests {
-	use std::convert::TryFrom;
 	use bitcoin::{Transaction, TxIn, ScriptBuf, Sequence, Witness, TxOut};
 	use hex::DisplayHex;
 	use crate::ln::{PaymentPreimage, PaymentHash, PaymentSecret};

lightning/src/ln/onion_payment.rs

@@ -20,7 +20,9 @@ use crate::ln::onion_utils::{HTLCFailReason, INVALID_ONION_BLINDING};
 use crate::sign::{NodeSigner, Recipient};
 use crate::util::logger::Logger;
 
+#[allow(unused_imports)]
 use crate::prelude::*;
+
 use core::ops::Deref;
 
 /// Invalid inbound onion payment.

lightning/src/ln/onion_route_tests.rs

@@ -39,7 +39,6 @@ use bitcoin::secp256k1::{PublicKey, Secp256k1, SecretKey};
 
 use crate::io;
 use crate::prelude::*;
-use core::default::Default;
 use bitcoin::hashes::hex::FromHex;
 
 use crate::ln::functional_test_utils::*;