Fix error reporting for parallel parsed function blocks.

src/PNaClTranslator.cpp

Index: src/PNaClTranslator.cpp
diff --git a/src/PNaClTranslator.cpp b/src/PNaClTranslator.cpp
index 0bba5c27ef78222d983084fa7dc2bafa3632346e..c73d9162b429fda3f4e2dde514e42add4688b9b2 100644
--- a/src/PNaClTranslator.cpp
+++ b/src/PNaClTranslator.cpp
@@ -782,7 +782,8 @@ bool BlockParserBaseClass::ErrorAt(naclbitc::ErrorLevel Level, uint64_t Bit,
   } else {
     StrBuf << Message;
   }
-  return Context->ErrorAt(Level, Bit, StrBuf.str());
+  return Context->ErrorAt(Level, Record.GetCursor().getErrorBitNo(Bit),
+                          StrBuf.str());
 }
 
 void BlockParserBaseClass::reportRecordSizeError(size_t ExpectedSize,
@@ -3114,7 +3115,8 @@ private:
 
 std::unique_ptr<Ice::Cfg> CfgParserWorkItem::getParsedCfg() {
   NaClBitstreamCursor &OldCursor(ModParser->getCursor());
-  llvm::NaClBitstreamReader Reader(Buffer.get(), Buffer.get() + BufferSize,
+  llvm::NaClBitstreamReader Reader(OldCursor.getStartWordByteForBit(StartBit),
+                                   Buffer.get(), Buffer.get() + BufferSize,
                                    OldCursor.getBitStreamReader());
   NaClBitstreamCursor NewCursor(Reader);
   NewCursor.JumpToBit(NewCursor.getWordBitNo(StartBit));