Fix Linux segfault on application exit (dead GL context in global destructors)

src/CrealityPrint.cpp

@@ -6709,6 +6709,11 @@ extern "C" {
 #ifdef USE_BREAKPAD
 static bool dumpCallback(const google_breakpad::MinidumpDescriptor& descriptor,void* context, bool succeeded) {
                 printf("Dump path: %s\n", descriptor.path());
+		 // This runs from breakpad's signal handler. A C++ exception escaping here
+		 // (e.g. boost::filesystem::rename throwing when the target dir is missing)
+		 // unwinds out of the signal handler and double-faults into a second, harder
+		 // crash. Keep every throwing operation below inside this guard.
+		 try {
 		 if (succeeded) {
 		     boost::filesystem::path oldPath(descriptor.path());
 		     std::string data_dir = Slic3r::data_dir();
@@ -6763,6 +6768,9 @@ static bool dumpCallback(const google_breakpad::MinidumpDescriptor& descriptor,v
 		 } else {
 		     BOOST_LOG_TRIVIAL(error) << "MiniDump failed: " << descriptor.path();
 		 }
+		 } catch (...) {
+		     // Never let an exception escape the signal handler.
+		 }
                 return succeeded;
             }
 #endif

src/slic3r/GUI/GUI_App.cpp

@@ -3832,7 +3832,18 @@ int GUI_App::OnExit()
     int result = wxApp::OnExit();
     BOOST_LOG_TRIVIAL(warning) << __FUNCTION__ << " end";
     boost::log::core::get()->flush();
+#ifdef __linux__
+    // On Linux the GL/GTK context is already torn down by the time std::exit() drives
+    // the global/static destructors. Static GLModel instances then call
+    // GLModel::RenderData::release() -> glDeleteBuffers() into a dead context, which
+    // segfaults on shutdown (and breakpad's handler double-faults on top of it).
+    // All persistent state (AppConfig, presets) has already been saved during the
+    // window-close sequence and wxApp::OnExit() above, so skip the global-destructor
+    // teardown entirely and terminate immediately.
+    std::_Exit(0);
+#else
     std::exit(0);
+#endif
     return 0;
 }