Index: lib/LTO/LTOModule.cpp
===================================================================
--- lib/LTO/LTOModule.cpp
+++ lib/LTO/LTOModule.cpp
@@ -62,7 +62,11 @@
 bool LTOModule::isBitcodeFile(const void *Mem, size_t Length) {
   Expected<MemoryBufferRef> BCData = IRObjectFile::findBitcodeInMemBuffer(
       MemoryBufferRef(StringRef((const char *)Mem, Length), "<mem>"));
-  return bool(BCData);
+  if (!BCData) {
+    consumeError(BCData.takeError());
+    return false;
+  }
+  return true;
 }
 
 bool LTOModule::isBitcodeFile(StringRef Path) {
@@ -73,6 +77,11 @@
 
   Expected<MemoryBufferRef> BCData = IRObjectFile::findBitcodeInMemBuffer(
       BufferOrErr.get()->getMemBufferRef());
+  if (!BCData) {
+    consumeError(BCData.takeError());
+    return false;
+  }
+  return true;
   return bool(BCData);
 }
 
@@ -89,8 +98,10 @@
                                    StringRef TriplePrefix) {
   Expected<MemoryBufferRef> BCOrErr =
       IRObjectFile::findBitcodeInMemBuffer(Buffer->getMemBufferRef());
-  if (!BCOrErr)
+  if (!BCOrErr) {
+    consumeError(BCOrErr.takeError());
     return false;
+  }
   LLVMContext Context;
   ErrorOr<std::string> TripleOrErr =
       expectedToErrorOrAndEmitErrors(Context, getBitcodeTargetTriple(*BCOrErr));
@@ -102,8 +113,10 @@
 std::string LTOModule::getProducerString(MemoryBuffer *Buffer) {
   Expected<MemoryBufferRef> BCOrErr =
       IRObjectFile::findBitcodeInMemBuffer(Buffer->getMemBufferRef());
-  if (!BCOrErr)
+  if (!BCOrErr) {
+    consumeError(BCOrErr.takeError());
     return "";
+  }
   LLVMContext Context;
   ErrorOr<std::string> ProducerOrErr = expectedToErrorOrAndEmitErrors(
       Context, getBitcodeProducerString(*BCOrErr));