diff --git a/src/libslic3r/PrintConfig.cpp b/src/libslic3r/PrintConfig.cpp
index 1c2947099a..c8e0ae2706 100644
--- a/src/libslic3r/PrintConfig.cpp
+++ b/src/libslic3r/PrintConfig.cpp
@@ -841,7 +841,8 @@ void PrintConfigDef::init_fff_params()
     def = this->add("extra_perimeters_on_overhangs", coBool);
     def->label = L("Extra perimeters on overhangs (Experimental)");
     def->category = L("Layers and Perimeters");
-    def->tooltip = L("Create additional perimeter paths over steep overhangs and areas where bridges cannot be anchored.");
+    def->tooltip = L("Detect overhang areas where bridges cannot be anchored, and fill them with "
+                    "extra perimeter paths. These paths are anchored to the nearby non-overhang area when possible.");
     def->mode = comExpert;
     def->set_default_value(new ConfigOptionBool(false));
 
diff --git a/src/slic3r/GUI/BackgroundSlicingProcess.cpp b/src/slic3r/GUI/BackgroundSlicingProcess.cpp
index 678761924c..31fb0ba552 100644
--- a/src/slic3r/GUI/BackgroundSlicingProcess.cpp
+++ b/src/slic3r/GUI/BackgroundSlicingProcess.cpp
@@ -235,7 +235,7 @@ void BackgroundSlicingProcess::thread_proc()
 		// Process the background slicing task.
 		m_state = STATE_RUNNING;
 		lck.unlock();
-		std::exception_ptr exception;
+		static std::exception_ptr exception;
 #ifdef _WIN32
 		this->call_process_seh_throw(exception);
 #else