Remove m_MemoryBuffers completely

lib/Interpreter/IncrementalParser.cpp

@@ -873,7 +873,8 @@ namespace cling {
  PP.enableIncrementalProcessing();
 
  smallstream source_name;
- source_name << "input_line_" << (m_MemoryBuffers.size() + 1);
+ // FIXME: Pre-increment to avoid failing tests.
+ source_name << "input_line_" << ++InputCount;
 
  // Create an uninitialized memory buffer, copy code in and append "\n"
  size_t InputSize = input.size(); // don't include trailing 0
@@ -891,8 +892,6 @@ namespace cling {
  // candidates for example
  SourceLocation NewLoc = getNextAvailableUniqueSourceLoc();
 
- llvm::MemoryBuffer* MBNonOwn = MB.get();
-
  // Create FileID for the current buffer.
  FileID FID;
  // Create FileEntry and FileID for the current buffer.
@@ -909,8 +908,6 @@ namespace cling {
  CO.CodeCompletionOffset+1/* 1-based column*/);
  }
 
- m_MemoryBuffers.push_back(std::make_pair(MBNonOwn, FID));
-
  // NewLoc only used for diags.
  PP.EnterSourceFile(FID, /*DirLookup*/nullptr, NewLoc);
  m_Consumer->getTransaction()->setBufferFID(FID);

lib/Interpreter/IncrementalParser.h

@@ -64,8 +64,8 @@ namespace cling {
  // parser (incremental)
  std::unique_ptr<clang::Parser> m_Parser;
 
- // One buffer for each command line, owner by the source file manager
- std::deque<std::pair<llvm::MemoryBuffer*, clang::FileID>> m_MemoryBuffers;
+ /// Counts the number of direct user input lines that have been parsed.
+ unsigned InputCount = 0;
 
  // file ID of the memory buffer
  clang::FileID m_VirtualFileID;