Call tree
LLVMFuzzerTestOneInput /src/r-oss-fuzz/harnesses/scan.c linenumber=-1
  fuzz_set_string /src/r-oss-fuzz/harnesses/common.h linenumber=90
    R_ToplevelExec  linenumber=192
    fuzz_do_set_string /src/r-oss-fuzz/harnesses/common.h linenumber=192
      Rf_mkChar  linenumber=186
      SET_STRING_ELT  linenumber=186
  R_ToplevelExec  linenumber=96
  fuzz_do_eval /src/r-oss-fuzz/harnesses/common.h linenumber=96
    Rf_eval  linenumber=166
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