Index: lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp
===================================================================
--- lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp
+++ lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp
@@ -933,8 +933,14 @@
     case eStateStepping: {
       // Run the thread, possibly feeding it the signal.
       const int signo = action->signal;
-      ResumeThread(static_cast<NativeThreadLinux &>(*thread), action->state,
-                   signo);
+      Status error = ResumeThread(static_cast<NativeThreadLinux &>(*thread),
+                                  action->state, signo);
+      if (error.Fail()) {
+        return Status("NativeProcessLinux::%s: failed to resume thread "
+                      "for pid %" PRIu64 ", tid %" PRIu64 ", error = %s",
+                      __FUNCTION__, GetID(), thread->GetID(),
+                      error.AsCString());
+      }
       break;
     }