no_std fixes

afl/src/events/mod.rs

@@ -226,6 +226,7 @@ where
             } => {
                 // here u should match sender_id, if equal to the current one do not re-execute
                 // we need to pass engine to process() too, TODO
+                #[cfg(feature = "std")]
                 println!("PLACEHOLDER: received NewTestcase");
                 Ok(())
             }

afl/src/executors/mod.rs

@@ -1,5 +1,7 @@
 pub mod inmemory;
 
+use alloc::boxed::Box;
+
 use crate::inputs::Input;
 use crate::observers::observer_serde::NamedSerdeAnyMap;
 use crate::observers::Observer;

afl/src/observers/mod.rs

@@ -1,5 +1,6 @@
 extern crate num;
 
+use alloc::boxed::Box;
 use core::any::Any;
 use core::slice::from_raw_parts_mut;
 use num::Integer;

afl/src/serde_anymap.rs

@@ -1,6 +1,7 @@
 use serde::{Deserialize, Serialize};
 
 use alloc::boxed::Box;
+use alloc::vec::Vec;
 use core::any::{Any, TypeId};
 
 pub fn pack_type_id(id: u64) -> TypeId {