anchor.diff:  q("no")
   ### END ONE TIME BUILD
   
  -R300 CMD INSTALL ~/data.table_1.9.7.tar.gz
  +R300 CMD INSTALL ~/data.table_1.9.9.tar.gz
   R300
   require(data.table)
   test.data.table()
  -test.data.table(verbose=TRUE)
   
   
   ###############################################
  
positive.code: ###############################################
  
  vi .R/Makevars  # make the -O0 -g line active, for info on source lines with any problems
  R --vanilla CMD INSTALL data.table_1.9.7.tar.gz
  R -d "valgrind --tool=memcheck --leak-check=full" --vanilla
  require(data.table)
  require(bit64)
  test.data.table()
  test.data.table(verbose=TRUE)
  
  # Tests 648 and 1262 have single precision issues under valgrind. See comments next to those tests.
  # Ignore 'set address range perms' warnings :
  #   http://stackoverflow.com/questions/13558067/what-does-this-valgrind-warning-mean-warning-set-address-range-perms
  
  
  ###############################################
  
negative.code: require(bit64)
  test.data.table()     # slower than usual of course due to UBSAN and ASAN. Too slow to run R CMD check.
  # Throws /0 errors on R's summary.c (tests 648 and 1185.2) but ignore those: https://bugs.r-project.org/bugzilla3/show_bug.cgi?id=16000
  q("no")
  
  
  