Fix a bug found by inspection.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28297 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/bugpoint/OptimizerDriver.cpp b/tools/bugpoint/OptimizerDriver.cpp
index 7cfc4fb..37e2f74 100644
--- a/tools/bugpoint/OptimizerDriver.cpp
+++ b/tools/bugpoint/OptimizerDriver.cpp
@@ -52,7 +52,11 @@
                                std::ios::binary;
   std::ofstream Out(Filename.c_str(), io_mode);
   if (!Out.good()) return true;
-  WriteBytecodeToFile(M ? M : Program, Out, /*compression=*/true);
+  try {
+    WriteBytecodeToFile(M ? M : Program, Out, /*compression=*/true);
+  } catch (...) {
+    return true;
+  }
   return false;
 }