Update for dev Coq

src/Congress.v

@@ -495,7 +495,7 @@ Proof.
   destruct (FMap.find (next_proposal_id state) (proposals state)) as [proposal|] eqn:find.
   - remember_new_proposal.
     rewrite <- (FMap.add_remove _ (next_proposal_id state) new_proposal).
-    Hint Resolve FMap.find_remove.
+    Hint Resolve FMap.find_remove : core.
     rewrite <- (FMap.add_id _ _ _ find) at 2.
     rewrite <- (FMap.add_remove _ (next_proposal_id state) proposal).
     repeat rewrite FMap.elements_add; auto.
@@ -540,7 +540,7 @@ Proof.
   rewrite <- (FMap.add_id (proposals state) pid p) at 2; auto.
   rewrite <- (FMap.add_remove _ pid p).
   rewrite <- (FMap.add_remove _ pid new_proposal).
-  Hint Resolve FMap.find_remove.
+  Hint Resolve FMap.find_remove : core.
   repeat rewrite FMap.elements_add; auto.
   subst; reflexivity.
 Qed.
@@ -793,7 +793,7 @@ Theorem congress_txs_well_behaved to contract :
   num_acts_created_in_proposals to contract.
 Proof.
   intros [trace] congress_deployed.
-  Hint Resolve contract_addr_format.
+  Hint Resolve contract_addr_format : core.
   assert (address_is_contract contract = true) as addr_format by eauto.
   remember empty_state eqn:eq.
   (* Contract cannot have been deployed in empty trace so we solve that immediately. *)

src/Congress_Buggy.v

@@ -437,7 +437,7 @@ Section Theories.
     let count tx :=
         match tx_body tx with
         | tx_call msg =>
-          match deserialize msg with
+          match deserialize msg : option Msg with
           | Some (create_proposal acts) => length acts
           | _ => 0
           end

src/LocalBlockchain.v

@@ -348,7 +348,7 @@ Section ExecuteActions.
       destruct trace as [trace].
       Hint Constructors ChainEvent : core.
       Hint Constructors ChainedList : core.
-      Hint Unfold ChainTrace.
+      Hint Unfold ChainTrace : core.
       destruct df.
       + (* depth-first case *)
         eapply IH; try eassumption; eauto.
@@ -504,7 +504,7 @@ Proof.
   refine (execute_actions_reachable _ _ _ _ _ _ exec).
   constructor.
   refine (snoc prev_lcb_trace _).
-  Hint Resolve validate_header_valid validate_actions_valid.
+  Hint Resolve validate_header_valid validate_actions_valid : core.
   eapply evt_block; eauto.
   apply add_new_block_header_equiv.
   reflexivity.

src/LocalBlockchainTests.v

@@ -178,7 +178,7 @@ Section LocalBlockchainTests.
   Print Assumptions chain8.
 End LocalBlockchainTests.
 
-Hint Resolve congress_txs_after_block.
+Hint Resolve congress_txs_after_block : core.
 (* The congress satisfies a property specialized to the local blockchain DFS: *)
 Lemma congress_txs_after_local_chain_block
           (prev new : LocalChainBuilderDepthFirst) baker acts slot finalization_height :