Update Rand Trait

crates/fast_rands/Cargo.toml

@@ -50,7 +50,7 @@ serde = { workspace = true, default-features = false, features = [
 ] } # serialization lib
 # Document all features of this crate (for `cargo doc`)
 document-features = { workspace = true, optional = true }
-rand_core = { version = "0.9.5", optional = true }
+rand_core = { version = "0.10.1", optional = true }
 pyo3 = { workspace = true, optional = true, features = ["serde", "macros"] }
 
 [lints]

crates/fast_rands/src/lib.rs

@@ -59,7 +59,7 @@ use core::{
 };
 
 #[cfg(feature = "rand_trait")]
-use rand_core::{RngCore, SeedableRng};
+use rand_core::{Rng, SeedableRng, TryRng};
 use serde::{Deserialize, Serialize};
 
 #[cfg(feature = "alloc")]
@@ -273,7 +273,7 @@ pub trait Rand {
 #[cfg(feature = "rand_trait")]
 impl<T> Rand for T
 where
-    T: RngCore + SeedableRng + Serialize + for<'de> Deserialize<'de> + Debug,
+    T: Rng + SeedableRng + Serialize + for<'de> Deserialize<'de> + Debug,
 {
     fn set_seed(&mut self, seed: u64) {
         *self = Self::seed_from_u64(seed);
@@ -333,17 +333,19 @@ impl_default_new!(Sfc64Rand);
 macro_rules! impl_rng_core {
     ($rand:ty) => {
         #[cfg(feature = "rand_trait")]
-        impl rand_core::RngCore for $rand {
-            fn next_u32(&mut self) -> u32 {
-                self.next() as u32
+        impl TryRng for $rand {
+            type Error = core::convert::Infallible;
+
+            fn try_next_u32(&mut self) -> Result<u32, Self::Error> {
+                Ok(self.next() as u32)
             }
 
-            fn next_u64(&mut self) -> u64 {
-                self.next()
+            fn try_next_u64(&mut self) -> Result<u64, Self::Error> {
+                Ok(self.next())
             }
 
-            fn fill_bytes(&mut self, dest: &mut [u8]) {
-                rand_core::impls::fill_bytes_via_next(self, dest)
+            fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), Self::Error> {
+                rand_core::utils::fill_bytes_via_next_word(dest, || self.try_next_u64())
             }
         }
     };
@@ -872,24 +874,26 @@ mod tests {
     #[test]
     #[cfg(feature = "rand_trait")]
     fn test_rand_trait() {
-        use rand_core::{RngCore, SeedableRng};
+        use rand_core::{Rng, SeedableRng, TryRng};
         use serde::{Deserialize, Serialize};
 
         #[derive(Debug, Serialize, Deserialize)]
         struct CountingRng(u64);
 
-        impl RngCore for CountingRng {
-            fn next_u32(&mut self) -> u32 {
-                self.next_u64() as u32
+        impl TryRng for CountingRng {
+            type Error = core::convert::Infallible;
+
+            fn try_next_u32(&mut self) -> Result<u32, Self::Error> {
+                Ok(self.try_next_u64()? as u32)
             }
 
-            fn next_u64(&mut self) -> u64 {
+            fn try_next_u64(&mut self) -> Result<u64, Self::Error> {
                 self.0 += 1;
-                self.0
+                Ok(self.0)
             }
 
-            fn fill_bytes(&mut self, dst: &mut [u8]) {
-                rand_core::impls::fill_bytes_via_next(self, dst);
+            fn try_fill_bytes(&mut self, dst: &mut [u8]) -> Result<(), Self::Error> {
+                rand_core::utils::fill_bytes_via_next_word(dst, || self.try_next_u64())
             }
         }
 
@@ -901,7 +905,7 @@ mod tests {
             }
         }
 
-        // LibAFL's Rand trait is auto-implemented for all SeedableRng + RngCore types.
+        // LibAFL's Rand trait is auto-implemented for all SeedableRng + Rng types.
         assert!(CountingRng(0).coinflip(0.1));
     }
 

crates/libafl_bolts/Cargo.toml

@@ -147,7 +147,7 @@ rustversion = { workspace = true }
 
 [dev-dependencies]
 clap = { version = "4.5", features = ["derive", "env"] }
-rand = "0.9.0"
+rand = "0.10.1"
 chrono = "0.4.43"
 itertools = "0.14.0"
 

crates/libafl_bolts/examples/simd/simd.rs

@@ -6,7 +6,7 @@ use libafl_bolts::simd::{
     SimdMinReducer, SimdOrReducer, SimdReducer, VectorType, covmap_is_interesting_naive,
     covmap_is_interesting_simd, simplify_map_naive, simplify_map_simd,
 };
-use rand::{RngCore, rngs::ThreadRng};
+use rand::{Rng, rngs::ThreadRng};
 
 fn default_map_size() -> usize {
     if std::env::var("CI").is_ok() {

crates/libafl_cc/build.rs

@@ -1,3 +1,5 @@
+#![allow(unused_imports)]
+
 use core::str;
 #[cfg(any(
     target_vendor = "apple",

crates/libafl_libfuzzer/runtime/Cargo.toml.template

@@ -72,7 +72,7 @@ libc = "0.2.159"
 log = { version = "0.4.22", features = ["release_max_level_info"] }
 mimalloc = { version = "0.1.43", default-features = false }
 num-traits = { version = "0.2.19", default-features = true }
-rand = "0.8.5"
+rand = "0.10.1"
 serde = { version = "1.0.228", default-features = true, features = [
   "derive",
 ] } # serialization lib

fuzzers/baby/tutorial/Cargo.toml

@@ -35,11 +35,12 @@ libafl_targets = { path = "../../../crates/libafl_targets", features = [
 serde = { version = "1.0.228", default-features = false, features = [
   "alloc",
 ] } # serialization lib
-lain = { version = "0.5.6", features = [
+lain = { version = "0.5.7", features = [
   "serde_support",
-], git = "https://github.com/AFLplusplus/lain.git", rev = "6ac90a35cfff15e314cf33b098f6cac4691c7ab3" } # We're using a lain fork compatible with libafl's rand version
+], git = "https://github.com/AFLplusplus/lain.git", rev = "8e2c083670f76acbd7105be2d7f5a58fc38291c0" } # We're using a lain fork compatible with libafl's rand version
 # TODO Include it only when building cc
-libafl_cc = { path = "../../../crates/libafl_cc" }
+libafl_cc = { path = "../../../crates/libafl_cc", default-features = false }
+log = { version = "0.4.22", features = ["release_max_level_info"] }
 
 [lib]
 name = "tutorial"