Package check result: WARNING

Check: compilation flags used, Result: WARNING
  Compilation used the following non-portable flag(s):
    ‘-Wno-deprecated-declarations’ ‘-Wno-ignored-attributes’
    ‘-Wno-stringop-truncation’
  including flag(s) suppressing warnings

Post-processing issues found:

File: tests/testthat.Rout
/home/hornik/tmp/CRAN_special_gcc-san/Library/Rcpp/include/Rcpp/vector/traits.h:49:62: runtime error: reference binding to misaligned address 0x000000000001 for type 'type', which requires 8 byte alignment
/home/hornik/tmp/CRAN_special_gcc-san/Library/Rcpp/include/Rcpp/vector/Vector.h:340:62: runtime error: reference binding to misaligned address 0x000000000001 for type 'type', which requires 8 byte alignment
/home/hornik/tmp/CRAN_special_gcc-san/Library/Rcpp/include/Rcpp/vector/traits.h:49:62: runtime error: reference binding to misaligned address 0x000000000001 for type 'type', which requires 8 byte alignment
/home/hornik/tmp/CRAN_special_gcc-san/Library/Rcpp/include/Rcpp/vector/Vector.h:340:62: runtime error: reference binding to misaligned address 0x000000000001 for type 'type', which requires 8 byte alignment