Fix the NaCl bitstream reader to report fatal errors.

include/llvm/Bitcode/NaCl/NaClObjDumpStream.h

 //===- NaClObjDumpStream.h --------------------------------------*- C++ -*-===//
 //     Models an objdump stream (bitcode records/assembly code).
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 
@@ skipping 826 matching lines @@
 
   /// Prints "Error(Bit/8:Bit%8): " onto the comments stream, records
   /// that an error has occurred, and then returns the comments
   /// stream. In general errors will be printed after the next record,
   /// unless a call to Flush is made.
   raw_ostream &Error(uint64_t Bit);
 
   /// Write a fatal error message to the dump stream, and then
   /// stop the executable. If any assembly, comments, or errors have
   /// been buffered, they will be printed first.
+  LLVM_ATTRIBUTE_NORETURN
   void Fatal(const std::string &Message) {
     Fatal(LastKnownBit, Message);
   }
 
   /// Write a fatal error message to the dump stream, and then
   /// stop the executable. If any assembly, comments, or errors have
   /// been buffered, they will be printed first. Associates fatal error
   /// Message with the given Bit.
+  LLVM_ATTRIBUTE_NORETURN
   void Fatal(uint64_t Bit, const std::string &Message);
 
   /// Write a fatal error message to the dump stream, and then
   /// stop the executable. If any assembly, comments, or errors have
   /// been buffered, they will be printed first, along with the given record.
+  LLVM_ATTRIBUTE_NORETURN
   void Fatal(uint64_t Bit,
              const llvm::NaClBitcodeRecordData &Record,
              const std::string &Message);
 
   /// Dumps a record (at the given bit), along with all buffered assembly,
   /// comments, and errors, into the objdump stream.
   void Write(uint64_t Bit,
              const llvm::NaClBitcodeRecordData &Record,
              int32_t AbbrevIndex = ABBREV_INDEX_NOT_SPECIFIED) {
     LastKnownBit = Bit;
@@ skipping 127 matching lines @@
   // Returns the message stream with 'Label(Bit/8:Bit%8): '.
   raw_ostream &PrintMessagePrefix(const char *Label, uint64_t Bit) {
     return Comments() << Label << "(" << ObjDumpAddress(Bit) << "): ";
   }
 };
 
 }
 }
 
 #endif