Index: lldb/tools/lldb-vscode/lldb-vscode.cpp
===================================================================
--- lldb/tools/lldb-vscode/lldb-vscode.cpp
+++ lldb/tools/lldb-vscode/lldb-vscode.cpp
@@ -179,6 +179,19 @@
 // Send a "terminated" event to indicate the process is done being
 // debugged.
 void SendTerminatedEvent() {
+  // If an inferior exits prior to the processing of a disconnect request, then
+  // the threads executing EventThreadFunction and request_discontinue
+  // respectively may call SendTerminatedEvent simultaneously. Without any
+  // synchronization, the thread executing EventThreadFunction may set
+  // g_vsc.sent_terminated_event before the thread executing
+  // request_discontinue has had a chance to test it, in which case the latter
+  // would move ahead to issue a response to the disconnect request. Said
+  // response may get dispatched ahead of the terminated event compelling the
+  // client to terminate the debug session without consuming any console output
+  // that might've been generated by the execution of terminateCommands. So,
+  // synchronize simultaneous calls to SendTerminatedEvent.
+  static std::mutex mutex;
+  std::lock_guard<std::mutex> locker(mutex);
   if (!g_vsc.sent_terminated_event) {
     g_vsc.sent_terminated_event = true;
     g_vsc.RunTerminateCommands();