llvm-profdata: Check for bad data in the show command

llvm-svn: 204573
diff --git a/llvm/tools/llvm-profdata/llvm-profdata.cpp b/llvm/tools/llvm-profdata/llvm-profdata.cpp
index 5a0e27f..397b523 100644
--- a/llvm/tools/llvm-profdata/llvm-profdata.cpp
+++ b/llvm/tools/llvm-profdata/llvm-profdata.cpp
@@ -137,6 +137,8 @@
     if (Show && ShowCounts)
       OS << "]\n";
   }
+  if (Reader->hasError())
+    exitWithError(Reader->getError().message(), Filename);
 
   if (ShowAllFunctions || !ShowFunction.empty())
     OS << "Functions shown: " << ShownFunctions << "\n";