When handling raw_ostream errors manually, use clear_error() so that

raw_ostream doesn't try to do its own error handling.

Also, close the raw_ostream before checking for errors so that any
errors that occur during closing are caught by the manual check.

llvm-svn: 104882

llvm/tools/lto/LTOCodeGenerator.cpp

@@ -152,10 +152,12 @@ bool LTOCodeGenerator::writeMergedModules(const char *path,
     
   // write bitcode to it
   WriteBitcodeToFile(_linker.getModule(), Out);
+  Out.close();
 
   if (Out.has_error()) {
     errMsg = "could not write bitcode file: ";
     errMsg += path;
+    Out.clear_error();
     return true;
   }