Fix to an issue causing a thread to exit if any fiber therein self-cancels

src/log/logger.cpp

@@ -78,9 +78,10 @@ namespace fc {
 
     std::unordered_map<std::string,logger>& get_logger_map() {
       static bool force_link_default_config = fc::do_default_config;
-      static std::unordered_map<std::string,logger> lm;
+      //TODO: Atomic compare/swap set
+      static std::unordered_map<std::string,logger>* lm = new std::unordered_map<std::string, logger>();
       (void)force_link_default_config; // hide warning;
-      return lm;
+      return *lm;
     }
 
     logger logger::get( const fc::string& s ) {

src/thread/future.cpp

@@ -26,6 +26,7 @@ namespace fc {
   }
                
   void promise_base::cancel(){
+//      wlog("${desc} canceled!", ("desc", _desc? _desc : ""));
     _canceled = true;
   }
   bool promise_base::ready()const {

src/thread/thread.cpp

@@ -139,7 +139,7 @@ namespace fc {
           return;
       }
 
-      //wlog( "${s}", ("s",name()) );
+//      wlog( "${s}", ("s",name()) );
       // We are quiting from our own thread...
 
       // break all promises, thread quit!
@@ -200,9 +200,9 @@ namespace fc {
       try {
         my->process_tasks(); 
       } 
-      catch( canceled_exception& )
+      catch( canceled_exception& e )
       {
-         wlog( "thread canceled" );
+         wlog( "thread canceled: ${e}", ("e", e.to_detail_string()) );
       }
       delete my->current;
       my->current = 0;

src/thread/thread_d.hpp

@@ -345,8 +345,10 @@ namespace fc {
                 //current = prev;
               }
 
-              if( current->canceled )
+              if( current->canceled ) {
+                   current->canceled = false;
                    FC_THROW_EXCEPTION( canceled_exception, "" );
+              }
 
               return true;
            }