Now ignores SIGPIPE, and added process->write check in source_language_protocol.cc

src/juci.cc

@@ -5,6 +5,9 @@
 #include "menu.h"
 #include "config.h"
 #include "terminal.h"
+#ifndef _WIN32
+#include <signal.h>
+#endif
 
 int Application::on_command_line(const Glib::RefPtr<Gio::ApplicationCommandLine> &cmd) {
   Glib::set_prgname("juci");
@@ -124,5 +127,8 @@ Application::Application() : Gtk::Application("no.sout.juci", Gio::APPLICATION_N
 }
 
 int main(int argc, char *argv[]) {
+#ifndef _WIN32
+  signal(SIGPIPE, SIG_IGN); // Do not terminate application when writing to a process fails
+#endif
   return Application().run(argc, argv);
 }

src/source_language_protocol.cc

@@ -232,7 +232,16 @@ void LanguageProtocol::Client::write_request(const std::string &method, const st
   auto message="Content-Length: "+std::to_string(content.size())+"\r\n\r\n"+content;
   if(output_messages_and_errors)
     std::cout << "Language client: " << content << std::endl;
-  process->write(message);
+  if(!process->write(message)) {
+    auto id_it=handlers.find(message_id);
+    if(id_it!=handlers.end()) {
+      auto function=std::move(id_it->second);
+      lock.unlock();
+      function(boost::property_tree::ptree(), false);
+      lock.lock();
+      handlers.erase(id_it->first);
+    }
+  }
 }
 
 void LanguageProtocol::Client::write_notification(const std::string &method, const std::string &params) {