Fix runtime build with the latest rustc

Author: dmitry-markin

runtime/Cargo.toml

@@ -38,7 +38,7 @@ sp-consensus-grandpa = { default-features = false, git = "https://github.com/par
 sp-core = { default-features = false, git = "https://github.com/paritytech/polkadot-sdk.git", rev = "cdf107de700388a52a17b2fb852c98420c78278e" }
 sp-genesis-builder = { default-features = false, git = "https://github.com/paritytech/polkadot-sdk.git", rev = "cdf107de700388a52a17b2fb852c98420c78278e" }
 sp-inherents = { default-features = false, git = "https://github.com/paritytech/polkadot-sdk.git", rev = "cdf107de700388a52a17b2fb852c98420c78278e" }
-sp-io = { default-features = false, git = "https://github.com/paritytech/polkadot-sdk.git", rev = "cdf107de700388a52a17b2fb852c98420c78278e" }
+sp-io = { default-features = false, git = "https://github.com/paritytech/polkadot-sdk.git", rev = "cdf107de700388a52a17b2fb852c98420c78278e", features = ["disable_panic_handler"] }
 sp-offchain = { default-features = false, git = "https://github.com/paritytech/polkadot-sdk.git", rev = "cdf107de700388a52a17b2fb852c98420c78278e" }
 sp-runtime = { default-features = false, git = "https://github.com/paritytech/polkadot-sdk.git", rev = "cdf107de700388a52a17b2fb852c98420c78278e" }
 sp-session = { default-features = false, git = "https://github.com/paritytech/polkadot-sdk.git", rev = "cdf107de700388a52a17b2fb852c98420c78278e" }

runtime/src/lib.rs

@@ -64,6 +64,7 @@ pub use sp_runtime::{Perbill, Permill};
 
 mod bridge_config;
 mod genesis_config_presets;
+mod panic_handler;
 mod weights;
 mod xcm_config;
 

runtime/src/panic_handler.rs

@@ -0,0 +1,11 @@
+//! Panic handler for builds without `std`.
+
+use sp_core::LogLevel;
+
+#[cfg(not(feature = "std"))]
+#[panic_handler]
+pub fn panic(info: &core::panic::PanicInfo) -> ! {
+	let message = alloc::format!("{}", info);
+	sp_io::logging::log(LogLevel::Error, "runtime", message.as_bytes());
+	unreachable!();
+}