fixed build

src/corpus/mod.rs

@@ -1,3 +1,4 @@
+extern crate alloc;
 pub mod testcase;
 pub use testcase::{Testcase, TestcaseMetadata};
 
@@ -5,10 +6,10 @@ use crate::inputs::Input;
 use crate::utils::{HasRand, Rand};
 use crate::AflError;
 
+use alloc::rc::Rc;
 use core::cell::RefCell;
-use std::marker::PhantomData;
+use core::marker::PhantomData;
 use std::path::PathBuf;
-use std::rc::Rc;
 
 pub trait HasEntriesVec<I>
 where

src/corpus/testcase.rs

@@ -1,10 +1,11 @@
+extern crate alloc;
 use crate::inputs::Input;
 use crate::AflError;
 
-use hashbrown::HashMap;
+use alloc::rc::Rc;
 use core::cell::RefCell;
+use hashbrown::HashMap;
 use std::path::PathBuf;
-use std::rc::Rc;
 
 // TODO: Give example
 /// Metadata for a testcase

src/engines/mod.rs

@@ -1,19 +1,16 @@
-use crate::corpus::testcase::{Testcase, TestcaseMetadata};
+extern crate alloc;
-use crate::corpus::Corpus;
+use crate::corpus::testcase::Testcase;
-use crate::executors::Executor;
 use crate::feedbacks::Feedback;
 use crate::inputs::Input;
 use crate::stages::Stage;
 use crate::AflError;
 
+use alloc::rc::Rc;
 use core::cell::RefCell;
-use std::rc::Rc;
 
-pub trait Engine<I, C, E>
+pub trait Engine<I>
 where
     I: Input,
-    C: Corpus<I>,
-    E: Executor<I, C>,
 {
     fn feedbacks(&self) -> &Vec<Box<dyn Feedback<I>>>;
 
@@ -31,17 +28,12 @@ where
         self.stages_mut().push(stage);
     }
 
-    fn executor(&self) -> &E;
-
-    fn executor_mut(&mut self) -> &mut E;
-
     fn fuzz_one(&mut self, testcase: &Rc<RefCell<Testcase<I>>>) -> Result<(), AflError> {
         for stage in self.stages_mut() {
             stage.perform(&testcase)?;
         }
         Ok(())
     }
-
 }
 
 pub struct DefaultEngine<I>
@@ -52,11 +44,9 @@ where
     stages: Vec<Box<dyn Stage<I>>>,
 }
 
-impl<I, C, E> Engine<I, C, E> for DefaultEngine<I>
+impl<I> Engine<I> for DefaultEngine<I>
 where
     I: Input,
-    C: Corpus<I>,
-    E: Executor<I, C>,
 {
     fn feedbacks(&self) -> &Vec<Box<dyn Feedback<I>>> {
         &self.feedbacks
@@ -73,61 +63,39 @@ where
     fn stages_mut(&mut self) -> &mut Vec<Box<dyn Stage<I>>> {
         &mut self.stages
     }
-
 }
 
 impl<I> DefaultEngine<I>
 where
     I: Input,
 {
-    pub fn new(executor: E) -> Self {
+    pub fn new() -> Self {
         DefaultEngine {
             feedbacks: vec![],
             stages: vec![],
         }
     }
 
-    pub fn new_rr(executor: E) -> Rc<RefCell<Self>> {
+    pub fn new_rr() -> Rc<RefCell<Self>> {
-        Rc::new(RefCell::new(Self::new(executor)))
+        Rc::new(RefCell::new(Self::new()))
     }
 }
 
-pub struct FuzzState<I, C>
-where
-    I: Input,
-    C: Corpus<I>,
-{
-
-    corpus: C,
-    current_input: Option<I>,
-
-}
-
-impl<I, C> FuzzState<I, C>
-where
-    I: Input,
-    C: Corpus<I>,
-{
-    pub fn new(corpus: C) -> Self {
-        Self{corpus: corpus, current_input: None}
-    }
-}
-
-
 #[cfg(test)]
 mod tests {
     use crate::corpus::{Corpus, InMemoryCorpus, Testcase};
-    use crate::engines::{DefaultEngine, Engine, FuzzState};
+    use crate::engines::{DefaultEngine, Engine};
     use crate::executors::inmemory::InMemoryExecutor;
     use crate::executors::{Executor, ExitKind};
     use crate::inputs::bytes::BytesInput;
-    use crate::mutators::DefaultScheduledMutator;
+    use crate::mutators::scheduled::{
-    use crate::mutators::scheduled::mutation_bitflip;
+        mutation_bitflip, ComposedByMutations, DefaultScheduledMutator,
+    };
     use crate::stages::mutational::DefaultMutationalStage;
-    use crate::stages::Stage;
+
     use crate::utils::Xoshiro256StarRand;
 
-    fn harness<I, C>(_executor: &dyn Executor<I, C>, _buf: &[u8]) -> ExitKind {
+    fn harness<I>(_executor: &dyn Executor<I>, _buf: &[u8]) -> ExitKind {
         ExitKind::Ok
     }
 
@@ -135,15 +103,14 @@ mod tests {
     fn test_engine() {
         let rand = Xoshiro256StarRand::preseeded_rr();
 
-        let corpus = InMemoryCorpus::<BytesInput, _>::new(&rand);
+        let mut corpus = InMemoryCorpus::<BytesInput, _>::new(&rand);
         let testcase = Testcase::new_rr(BytesInput::new(vec![0; 4]));
         corpus.add(testcase);
-        let executor = InMemoryExecutor::new(harness);
+        let executor = InMemoryExecutor::new_rr(harness);
-        let state = FuzzState::new(corpus);
+        let mut engine = DefaultEngine::new();
-        let engine = DefaultEngine::new(executor);
+        let mut mutator = DefaultScheduledMutator::new(&rand);
-        let mutator = DefaultScheduledMutator::new(&rand);
         mutator.add_mutation(mutation_bitflip);
-        let stage = DefaultMutationalStage::new(&rand, &engine, mutator);
+        let stage = DefaultMutationalStage::new(&rand, &executor, mutator);
         engine.add_stage(Box::new(stage));
         engine.fuzz_one(&corpus.next().unwrap()).unwrap();
     }

src/executors/inmemory.rs

@@ -1,32 +1,34 @@
-use crate::executors::Corpus;
+extern crate alloc;
+use crate::feedbacks::Feedback;
 use crate::inputs::Input;
 use crate::observers::Observer;
 use crate::AflError;
+use alloc::rc::Rc;
+use core::cell::RefCell;
 
 use crate::executors::{Executor, ExitKind};
 
 use std::os::raw::c_void;
 use std::ptr;
 
-type HarnessFunction<I, C> = fn(&dyn Executor<I, C>, &[u8]) -> ExitKind;
+type HarnessFunction<I> = fn(&dyn Executor<I>, &[u8]) -> ExitKind;
 
-pub struct InMemoryExecutor<I, C>
+pub struct InMemoryExecutor<I>
 where
     I: Input,
-    C: Corpus<I>,
 {
     observers: Vec<Box<dyn Observer>>,
-    harness: HarnessFunction<I, C>,
+    harness: HarnessFunction<I>,
+    feedbacks: Vec<Box<dyn Feedback<I>>>,
 }
 
 static mut CURRENT_INMEMORY_EXECUTOR_PTR: *const c_void = ptr::null();
 
-impl<I, C> Executor<I, C> for InMemoryExecutor<I, C>
+impl<I> Executor<I> for InMemoryExecutor<I>
 where
     I: Input,
-    C: Corpus<I>,
 {
-    fn run_target(&mut self, input: &mut I) -> Result<ExitKind, AflError> {
+    fn run_target(&mut self, input: &I) -> Result<ExitKind, AflError> {
         let bytes = input.serialize()?;
         unsafe {
             CURRENT_INMEMORY_EXECUTOR_PTR = self as *const InMemoryExecutor<I> as *const c_void;
@@ -59,22 +61,38 @@ where
     fn observers(&self) -> &Vec<Box<dyn Observer>> {
         &self.observers
     }
+
+    fn feedbacks(&self) -> &Vec<Box<dyn Feedback<I>>> {
+        &self.feedbacks
+    }
+
+    fn feedbacks_mut(&mut self) -> &mut Vec<Box<dyn Feedback<I>>> {
+        &mut self.feedbacks
+    }
+
+    fn add_feedback(&mut self, feedback: Box<dyn Feedback<I>>) {
+        self.feedbacks_mut().push(feedback);
+    }
 }
 
-impl<I, C> InMemoryExecutor<I, C>
+impl<I> InMemoryExecutor<I>
 where
     I: Input,
-    C: Corpus<I>,
 {
-    pub fn new(harness_fn: HarnessFunction<I, C>) -> Self {
+    pub fn new(harness_fn: HarnessFunction<I>) -> Self {
         unsafe {
-            os_signals::setup_crash_handlers::<I, Self>();
+            os_signals::setup_crash_handlers::<I>();
         }
         InMemoryExecutor {
             observers: vec![],
+            feedbacks: vec![],
             harness: harness_fn,
         }
     }
+
+    pub fn new_rr(harness_fn: HarnessFunction<I>) -> Rc<RefCell<Self>> {
+        Rc::new(RefCell::new(Self::new(harness_fn)))
+    }
 }
 
 #[cfg(unix)]
@@ -167,8 +185,7 @@ compile_error!("InMemoryExecutor not yet supported on this OS");
 
 #[cfg(test)]
 mod tests {
-    use crate::executors::Corpus;
+    use crate::executors::inmemory::InMemoryExecutor;
-use crate::executors::inmemory::InMemoryExecutor;
     use crate::executors::{Executor, ExitKind};
     use crate::inputs::Input;
     use crate::observers::Observer;
@@ -196,16 +213,16 @@ use crate::executors::inmemory::InMemoryExecutor;
         }
     }
 
-    /*fn test_harness_fn_nop(_executor: &dyn Executor<Corpus, NopInput>, buf: &[u8]) -> ExitKind {
+    fn test_harness_fn_nop(_executor: &dyn Executor<NopInput>, buf: &[u8]) -> ExitKind {
         println! {"Fake exec with buf of len {}", buf.len()};
         ExitKind::Ok
-    }*/
+    }
 
     #[test]
     fn test_inmem_post_exec() {
-        //let mut in_mem_executor = InMemoryExecutor::new(test_harness_fn_nop);
+        let mut in_mem_executor = InMemoryExecutor::new(test_harness_fn_nop);
         let nopserver = Nopserver {};
-        //in_mem_executor.add_observer(Box::new(nopserver));
+        in_mem_executor.add_observer(Box::new(nopserver));
         assert_eq!(in_mem_executor.post_exec_observers().is_err(), true);
     }
 
@@ -213,6 +230,6 @@ use crate::executors::inmemory::InMemoryExecutor;
     fn test_inmem_exec() {
         let mut in_mem_executor = InMemoryExecutor::new(test_harness_fn_nop);
         let mut input = NopInput {};
-        //assert!(in_mem_executor.run_target(&mut input).is_ok());
+        assert!(in_mem_executor.run_target(&mut input).is_ok());
     }
 }

src/executors/mod.rs

@@ -1,14 +1,14 @@
+extern crate alloc;
 pub mod inmemory;
 
 use crate::corpus::Testcase;
-use core::cell::RefCell;
-use std::rc::Rc;
-use crate::corpus::Corpus;
 use crate::corpus::TestcaseMetadata;
 use crate::feedbacks::Feedback;
 use crate::inputs::Input;
 use crate::observers::Observer;
 use crate::AflError;
+use alloc::rc::Rc;
+use core::cell::RefCell;
 
 pub enum ExitKind {
     Ok,
@@ -19,13 +19,12 @@ pub enum ExitKind {
 
 // TODO unbox input
 
-pub trait Executor<I, C>
+pub trait Executor<I>
 where
     I: Input,
-    C: Corpus<I>,
 {
     /// Instruct the target about the input and run
-    fn run_target(&mut self, input: &mut I) -> Result<ExitKind, AflError>;
+    fn run_target(&mut self, input: &I) -> Result<ExitKind, AflError>;
 
     /// Reset the state of all the observes linked to this executor
     fn reset_observers(&mut self) -> Result<(), AflError>;
@@ -45,21 +44,20 @@ where
     /// Returns vector of feebacks
     fn feedbacks(&self) -> &Vec<Box<dyn Feedback<I>>>;
 
+    /// Returns vector of feebacks (mutable)
+    fn feedbacks_mut(&mut self) -> &mut Vec<Box<dyn Feedback<I>>>;
+
     // TODO: Move to another struct, like evaluator?
     // In any case, the dependency on Corpus should probably go
     /// Runs the input and triggers observers and feedback
-    fn evaluate_input(
+    fn evaluate_input(&mut self, input: &I) -> Result<bool, AflError> {
-        &mut self,
-        corpus: &mut C,
-        input: &mut I,
-    ) -> Result<bool, AflError> {
         self.reset_observers()?;
         self.run_target(input)?;
         self.post_exec_observers()?;
 
         let mut metadatas: Vec<Box<dyn TestcaseMetadata>> = vec![];
         let mut rate_acc = 0;
-        for feedback in self.feedbacks() {
+        for feedback in self.feedbacks_mut() {
             let (rate, meta) = feedback.is_interesting(input);
             rate_acc += rate;
             if let Some(m) = meta {
@@ -72,12 +70,11 @@ where
             for meta in metadatas {
                 new_entry.borrow_mut().add_metadata(meta);
             }
-            corpus.add(new_entry);
+            //TODO corpus.add(new_entry);
 
             Ok(true)
         } else {
             Ok(false)
         }
     }
-
 }

src/feedbacks/mod.rs

@@ -1,12 +1,13 @@
+extern crate alloc;
 extern crate num;
 
 use crate::corpus::TestcaseMetadata;
 use crate::inputs::Input;
 use crate::observers::MapObserver;
 
-use num::Integer;
 use core::cell::RefCell;
-use std::marker::PhantomData;
+use core::marker::PhantomData;
+use num::Integer;
 
 pub trait Feedback<I>
 where

src/inputs/bytes.rs

@@ -1,3 +1,4 @@
+extern crate alloc;
 use crate::inputs::{HasBytesVec, HasTargetBytes, Input};
 use crate::AflError;
 

src/inputs/mod.rs

@@ -1,3 +1,4 @@
+extern crate alloc;
 pub mod bytes;
 pub use bytes::BytesInput;
 

src/lib.rs

@@ -1,3 +1,4 @@
+extern crate alloc;
 use std::io;
 use thiserror::Error;
 

src/mutators/mod.rs

@@ -1,9 +1,10 @@
+extern crate alloc;
 pub mod scheduled;
+pub use scheduled::ComposedByMutations;
 pub use scheduled::DefaultScheduledMutator;
 pub use scheduled::HavocBytesMutator;
 pub use scheduled::ScheduledMutator;
 
-use crate::corpus::Corpus;
 use crate::inputs::Input;
 use crate::utils::HasRand;
 use crate::AflError;

src/mutators/scheduled.rs

@@ -1,12 +1,12 @@
-use crate::corpus::Corpus;
+extern crate alloc;
 use crate::inputs::{HasBytesVec, Input};
 use crate::mutators::Mutator;
 use crate::utils::{HasRand, Rand};
 use crate::AflError;
 
+use alloc::rc::Rc;
 use core::cell::RefCell;
-use std::marker::PhantomData;
+use core::marker::PhantomData;
-use std::rc::Rc;
 
 /// The generic function type that identifies mutations
 type MutationFunction<M, I> = fn(&mut M, &mut I) -> Result<(), AflError>;
@@ -58,21 +58,19 @@ where
     }
 }
 
-pub struct DefaultScheduledMutator<'a, I, C, R>
+pub struct DefaultScheduledMutator<'a, I, R>
 where
     I: Input,
-    C: Corpus<I>,
     R: Rand,
 {
     rand: Rc<RefCell<R>>,
     mutations: Vec<MutationFunction<Self, I>>,
 }
 
-impl<'a, I, C, R> HasRand for DefaultScheduledMutator<'_, I, C, R>
+impl<'a, I, R> HasRand for DefaultScheduledMutator<'_, I, R>
 where
     I: Input,
     R: Rand,
-    C: Corpus<I>,
 {
     type R = R;
 
@@ -81,23 +79,20 @@ where
     }
 }
 
-
+impl<'a, I, R> Mutator<I> for DefaultScheduledMutator<'_, I, R>
-impl<'a, I, C, R> Mutator<I> for DefaultScheduledMutator<'_, I, C, R>
 where
     I: Input,
     R: Rand,
-    C: Corpus<I>,
 {
     fn mutate(&mut self, input: &mut I, _stage_idx: i32) -> Result<(), AflError> {
         self.scheduled_mutate(input, _stage_idx)
     }
 }
 
-impl<'a, I, C, R> ComposedByMutations<I> for DefaultScheduledMutator<'_, I, C, R>
+impl<'a, I, R> ComposedByMutations<I> for DefaultScheduledMutator<'_, I, R>
 where
     I: Input,
     R: Rand,
-    C: Corpus<I>,
 {
     fn mutation_by_idx(&self, index: usize) -> Result<MutationFunction<Self, I>, AflError> {
         if index >= self.mutations.len() {
@@ -115,19 +110,17 @@ where
     }
 }
 
-impl<'a, I, C, R> ScheduledMutator<I> for DefaultScheduledMutator<'_, I, C, R>
+impl<'a, I, R> ScheduledMutator<I> for DefaultScheduledMutator<'_, I, R>
 where
     I: Input,
     R: Rand,
-    C: Corpus<I>,
 {
     // Just use the default methods
 }
 
-impl<'a, I, C, R> DefaultScheduledMutator<'a, I, C, R>
+impl<'a, I, R> DefaultScheduledMutator<'a, I, R>
 where
     I: Input,
-    C: Corpus<I>,
     R: Rand,
 {
     /// Create a new DefaultScheduledMutator instance without mutations and corpus
@@ -139,16 +132,12 @@ where
     }
 
     /// Create a new DefaultScheduledMutator instance specifying mutations and corpus too
-    pub fn new_all(
+    pub fn new_all(rand: &Rc<RefCell<R>>, mutations: Vec<MutationFunction<Self, I>>) -> Self {
-        rand: &Rc<RefCell<R>>,
-        mutations: Vec<MutationFunction<Self, I>>,
-    ) -> Self {
         DefaultScheduledMutator {
             rand: Rc::clone(rand),
             mutations: mutations,
         }
     }
-    
 }
 
 /// Bitflip mutation for inputs with a bytes vector
@@ -209,15 +198,14 @@ where
     }
 }
 
-impl<'a, I, C, R> HavocBytesMutator<I, DefaultScheduledMutator<'a, I, C, R>>
+impl<'a, I, R> HavocBytesMutator<I, DefaultScheduledMutator<'a, I, R>>
 where
     I: Input + HasBytesVec,
     R: Rand,
-    C: Corpus<I>,
 {
     /// Create a new HavocBytesMutator instance wrapping DefaultScheduledMutator
     pub fn new_default(rand: &Rc<RefCell<R>>) -> Self {
-        let mut scheduled = DefaultScheduledMutator::<'a, I, C, R>::new(rand);
+        let mut scheduled = DefaultScheduledMutator::<'a, I, R>::new(rand);
         scheduled.add_mutation(mutation_bitflip);
         HavocBytesMutator {
             scheduled: scheduled,

src/observers/mod.rs

@@ -1,3 +1,4 @@
+extern crate alloc;
 extern crate num;
 
 use num::Integer;

src/stages/mod.rs

@@ -1,3 +1,4 @@
+extern crate alloc;
 pub mod mutational;
 pub use mutational::DefaultMutationalStage;
 
@@ -5,8 +6,8 @@ use crate::corpus::Testcase;
 use crate::inputs::Input;
 use crate::AflError;
 
+use alloc::rc::Rc;
 use core::cell::RefCell;
-use std::rc::Rc;
 
 pub trait Stage<I>
 where

src/stages/mutational.rs

@@ -1,26 +1,23 @@
-use crate::corpus::Corpus;
+extern crate alloc;
-use crate::corpus::TestcaseMetadata;
-use crate::executors::Executor;
 use crate::corpus::testcase::Testcase;
-use crate::engines::Evaluator;
+use crate::executors::Executor;
 use crate::inputs::Input;
 use crate::mutators::Mutator;
 use crate::stages::Stage;
 use crate::utils::{HasRand, Rand};
 use crate::AflError;
 
-use std::cell::RefCell;
+use alloc::rc::Rc;
-use std::marker::PhantomData;
+use core::cell::RefCell;
-use std::rc::Rc;
+use core::marker::PhantomData;
 
 // TODO create HasMutatorsVec trait
 
-pub trait MutationalStage<I, C, M, E>: Stage<I> + HasRand
+pub trait MutationalStage<I, M, E>: Stage<I> + HasRand
 where
     I: Input,
     M: Mutator<I, R = Self::R>,
-    C: Corpus<I>,
+    E: Executor<I>,
-    E: Executor<I, C>,
 {
     /// The mutator registered for this stage
     fn mutator(&self) -> &M;
@@ -37,9 +34,9 @@ where
         1 + self.rand_below(128) as usize
     }
 
+    // TODO: We need a way to get testcases for splicing
     /// Runs this (mutational) stage for the given testcase
-    fn perform_mutational(&mut self, corpus: &mut C, testcase: &Rc<RefCell<Testcase<I>>>) -> Result<(), AflError> {
+    fn perform_mutational(&mut self, testcase: &Rc<RefCell<Testcase<I>>>) -> Result<(), AflError> {
-        let testcase = corpus.next()?;
         let num = self.iterations();
         let input = testcase.borrow_mut().load_input()?.clone();
 
@@ -47,7 +44,7 @@ where
             let mut input_tmp = input.clone();
             self.mutator_mut().mutate(&mut input_tmp, i as i32)?;
 
-            let interesting = self.executor().borrow_mut().evaluate_input(&corpus)?;
+            let interesting = self.executor().borrow_mut().evaluate_input(&input_tmp)?;
 
             self.mutator_mut().post_exec(interesting, i as i32)?;
         }
@@ -56,28 +53,25 @@ where
 }
 
 /// The default mutational stage
-pub struct DefaultMutationalStage<I, C, R, M, E>
+pub struct DefaultMutationalStage<I, R, M, E>
 where
     I: Input,
-    C: Corpus<I>,
     R: Rand,
     M: Mutator<I, R = R>,
-    E: Executor<I, C>,
+    E: Executor<I>,
 {
     rand: Rc<RefCell<R>>,
     executor: Rc<RefCell<E>>,
     mutator: M,
     _phantom_input: PhantomData<I>,
-    _phantom_corpus: PhantomData<C>,
 }
 
-impl<I, C, R, M, E> HasRand for DefaultMutationalStage<I, C, R, M, E>
+impl<I, R, M, E> HasRand for DefaultMutationalStage<I, R, M, E>
 where
     I: Input,
-    C: Corpus<I>,
     R: Rand,
     M: Mutator<I, R = R>,
-    E: Executor<I, C>,
+    E: Executor<I>,
 {
     type R = R;
 
@@ -86,14 +80,12 @@ where
     }
 }
 
-
+impl<I, R, M, E> MutationalStage<I, M, E> for DefaultMutationalStage<I, R, M, E>
-impl<I, C, R, M, E> MutationalStage<I, C, M, E> for DefaultMutationalStage<I, C, R, M, E>
 where
     I: Input,
-    C: Corpus<I>,
     R: Rand,
     M: Mutator<I, R = R>,
-    E: Executor<I, C>,
+    E: Executor<I>,
 {
     /// The mutator, added to this stage
     fn mutator(&self) -> &M {
@@ -104,28 +96,30 @@ where
     fn mutator_mut(&mut self) -> &mut M {
         &mut self.mutator
     }
-}
 
-impl<I, C, R, M, E> Stage<I> for DefaultMutationalStage<I, C, R, M, E>
+    fn executor(&self) -> &Rc<RefCell<E>> {
-where
+        &self.executor
-    I: Input,
-    C: Corpus<I>,
-    R: Rand,
-    M: Mutator<I, R = R>,
-    E: Executor<I, C>,
-{
-    fn perform(&mut self, corpus: &mut C) -> Result<(), AflError> {
-        self.perform_mutational(corpus)
     }
 }
 
-impl<I, C, R, M, E> DefaultMutationalStage<I, C, R, M, E>
+impl<I, R, M, E> Stage<I> for DefaultMutationalStage<I, R, M, E>
 where
     I: Input,
     R: Rand,
-    C: Corpus<I>,
     M: Mutator<I, R = R>,
-    E: Executor<I, C>,
+    E: Executor<I>,
+{
+    fn perform(&mut self, testcase: &Rc<RefCell<Testcase<I>>>) -> Result<(), AflError> {
+        self.perform_mutational(testcase)
+    }
+}
+
+impl<I, R, M, E> DefaultMutationalStage<I, R, M, E>
+where
+    I: Input,
+    R: Rand,
+    M: Mutator<I, R = R>,
+    E: Executor<I>,
 {
     /// Creates a new default mutational stage
     pub fn new(rand: &Rc<RefCell<R>>, executor: &Rc<RefCell<E>>, mutator: M) -> Self {
@@ -134,7 +128,6 @@ where
             executor: Rc::clone(executor),
             mutator: mutator,
             _phantom_input: PhantomData,
-            _phantom_corpus: PhantomData,
         }
     }
 }

src/utils.rs

@@ -1,9 +1,10 @@
 //! Utility functions for AFL
+extern crate alloc;
 
+use alloc::rc::Rc;
 use core::cell::RefCell;
 use std::debug_assert;
 use std::fmt::Debug;
-use std::rc::Rc;
 use std::time::{SystemTime, UNIX_EPOCH};
 
 use xxhash_rust::xxh3::xxh3_64_with_seed;
@@ -160,8 +161,8 @@ mod tests {
         assert!(rand.between(11, 20) > 10);
     }
 
+    use alloc::rc::Rc;
     use core::cell::RefCell;
-    use std::rc::Rc;
     struct HasRandTest<R>
     where
         R: Rand,