fail earlier on transfer and test rethrown exceptions of tester::push_transaction

contracts/eosio.token/eosio.token.cpp

@@ -10,8 +10,8 @@ namespace eosio {
 void token::create( account_name issuer,
                     asset        maximum_supply,
                     uint8_t      issuer_can_freeze,
-                    uint8_t      issuer_can_recall,  
-                    uint8_t      issuer_can_whitelist ) 
+                    uint8_t      issuer_can_recall,
+                    uint8_t      issuer_can_whitelist )
 {
     require_auth( _self );
 
@@ -33,7 +33,7 @@ void token::create( account_name issuer,
 }
 
 
-void token::issue( account_name to, asset quantity, string memo ) 
+void token::issue( account_name to, asset quantity, string memo )
 {
     print( "issue" );
     auto sym = quantity.symbol.name();
@@ -56,13 +56,14 @@ void token::issue( account_name to, asset quantity, string memo )
     }
 }
 
-void token::transfer( account_name from, 
+void token::transfer( account_name from,
                       account_name to,
                       asset        quantity,
-                      string       /*memo*/ ) 
+                      string       /*memo*/ )
 {
     print( "transfer" );
     require_auth( from );
+    eosio_assert( is_account( to ), "to account does not exist");
     auto sym = quantity.symbol.name();
     stats statstable( _self, sym );
     const auto& st = statstable.get( sym );

contracts/eosiolib/action.h

@@ -106,6 +106,8 @@ extern "C" {
     */
    void require_auth2( account_name name, permission_name permission );
 
+   bool is_account( account_name name );
+
    /**
     *  Send an inline action in the context of this action's parent transaction
     * @param serialized_action - serialized action

libraries/testing/test.cpp

@@ -179,7 +179,22 @@ int main( int argc, char** argv ) {
       //bad_block.producer = N(sam);
       //bad_block.schedule_version = 12;
       bad_block.transaction_mroot = bad_block.previous;
-      c.control->push_block( std::make_shared<signed_block>(bad_block) );
+      try {
+         c.control->push_block( std::make_shared<signed_block>(bad_block) );
+      } catch( const fc::exception& e ) {
+         elog(e.to_detail_string());
+      }
+
+      c.produce_blocks(3);
+
+      cr = c.push_action( N(eosio.token), N(issue), N(eosio), mutable_variant_object()
+                 ("to",       "unregistered" )
+                 ("quantity", "100.0000 EOS")
+                 ("memo", "")
+         );
+
+      wdump((fc::json::to_pretty_string(cr)));
+
 
    } FC_CAPTURE_AND_RETHROW()
    } catch ( const fc::exception& e ) {