Avoid the need for BackendApi to be Copy

Author: webmaster128

packages/vm/src/backend.rs

@@ -165,7 +165,7 @@ pub trait Storage {
 /// Currently it just supports address conversion, we could add eg. crypto functions here.
 /// These should all be pure (stateless) functions. If you need state, you probably want
 /// to use the Querier.
-pub trait BackendApi: Copy + Clone + Send {
+pub trait BackendApi: Clone + Send {
     fn addr_validate(&self, input: &str) -> BackendResult<()>;
     fn addr_canonicalize(&self, human: &str) -> BackendResult<Vec<u8>>;
     fn addr_humanize(&self, canonical: &[u8]) -> BackendResult<String>;

packages/vm/src/environment.rs

@@ -125,7 +125,7 @@ impl<A: BackendApi, S: Storage, Q: Querier> Clone for Environment<A, S, Q> {
     fn clone(&self) -> Self {
         Environment {
             memory: None,
-            api: self.api,
+            api: self.api.clone(),
             gas_config: self.gas_config.clone(),
             data: self.data.clone(),
         }

packages/vm/src/instance.rs

@@ -294,7 +294,7 @@ where
 
         let env = fe.as_ref(&store);
         if let (Some(storage), Some(querier)) = env.move_out() {
-            let api = env.api;
+            let api = env.api.clone();
             Some(Backend {
                 api,
                 storage,