fix crash on engine crash

diff --git a/backend.c b/backend.c
index 815f51d..342b6f8 100755 (executable)
--- a/backend.c
+++ b/backend.c
@@ -12411,7 +12411,7 @@ SendToProgram(message, cps)
             } else {
                 gameInfo.result = cps->twoMachinesColor[0]=='w' ? BlackWins : WhiteWins;
             }
-            gameInfo.resultDetails = buf;
+            gameInfo.resultDetails = StrSave(buf);
         }
         DisplayFatalError(buf, error, 1);
     }
@@ -12442,7 +12442,7 @@ ReceiveFromProgram(isr, closure, message, count, error)
                 } else {
                     gameInfo.result = cps->twoMachinesColor[0]=='w' ? BlackWins : WhiteWins;
                 }
-                gameInfo.resultDetails = buf;
+                gameInfo.resultDetails = StrSave(buf);
             }
            RemoveInputSource(cps->isr);
            DisplayFatalError(buf, 0, 1);