Fixed potential race condition

src/source_diff.cc

@@ -178,6 +178,7 @@ void Source::DiffView::configure() {
   });
   
   parse_thread=std::thread([this]() {
+    std::string status_branch;
     try {
       diff=get_diff();
       status_branch=repository->get_branch();
@@ -185,7 +186,8 @@ void Source::DiffView::configure() {
     catch(const std::exception &) {
       status_branch="";
     }
-    dispatcher.post([this] {
+    dispatcher.post([this, status_branch=std::move(status_branch)] {
+      this->status_branch=status_branch;
       if(update_status_branch)
         update_status_branch(this);
     });
@@ -216,8 +218,8 @@ void Source::DiffView::configure() {
           if(monitor_changed.compare_exchange_strong(expected_monitor_changed, false)) {
             try {
               diff=get_diff();
-              status_branch=repository->get_branch();
-              dispatcher.post([this] {
+              dispatcher.post([this, status_branch=repository->get_branch()] {
+                this->status_branch=status_branch;
                 if(update_status_branch)
                   update_status_branch(this);
               });
@@ -230,7 +232,7 @@ void Source::DiffView::configure() {
                 get_buffer()->remove_tag(renderer->tag_removed_below, get_buffer()->begin(), get_buffer()->end());
                 get_buffer()->remove_tag(renderer->tag_removed_above, get_buffer()->begin(), get_buffer()->end());
                 renderer->queue_draw();
-                status_branch="";
+                this->status_branch="";
                 if(update_status_branch)
                   update_status_branch(this);
               });