Package check result: NOTE

Check: dependencies in R code, Result: NOTE
  refstr.c:79:29: runtime error: member access within null pointer of type 'refstr_t' (aka 'struct refstr_t')
      #0 0x7b728de16349 in agstrdup /home/hornik/tmp/scratch/RtmpIqOwSW/R.INSTALL254bdf129d0dd1/Rgraphviz/src/graphviz/lib/graph/refstr.c:79:29
      #1 0x7b728ddff96b in agNEWgraph /home/hornik/tmp/scratch/RtmpIqOwSW/R.INSTALL254bdf129d0dd1/Rgraphviz/src/graphviz/lib/graph/graph.c:243:15
      #2 0x7b728ddfee90 in agopen /home/hornik/tmp/scratch/RtmpIqOwSW/R.INSTALL254bdf129d0dd1/Rgraphviz/src/graphviz/lib/graph/graph.c:291:9
      #3 0x7b728ddf6674 in initproto /home/hornik/tmp/scratch/RtmpIqOwSW/R.INSTALL254bdf129d0dd1/Rgraphviz/src/graphviz/lib/graph/attribs.c:183:22
      #4 0x7b728ddf6674 in aginitlib /home/hornik/tmp/scratch/RtmpIqOwSW/R.INSTALL254bdf129d0dd1/Rgraphviz/src/graphviz/lib/graph/attribs.c:332:2
      #5 0x7b728dc8c907 in gvContextPlugins /home/hornik/tmp/scratch/RtmpIqOwSW/R.INSTALL254bdf129d0dd1/Rgraphviz/src/graphviz/lib/gvc/gvc.c:61:5
      #6 0x7b728da10856 in Rgraphviz_init /home/hornik/tmp/scratch/RtmpIqOwSW/R.INSTALL254bdf129d0dd1/Rgraphviz/src/init.c:29:11
      #7 0x7f72b453bcaa in R_doDotCall /home/hornik/src/R/src/main/dotcode.c:751:11
      #8 0x7f72b4594bec in do_dotcall /home/hornik/src/R/src/main/dotcode.c:1437:11
      #9 0x7f72b46e71d6 in bcEval_loop /home/hornik/src/R/src/main/eval.c:8132:14
      #10 0x7f72b469ba34 in bcEval /home/hornik/src/R/src/main/eval.c:7515:16
      #11 0x7f72b469a16f in Rf_eval /home/hornik/src/R/src/main/eval.c:1167:8
      #12 0x7f72b46a499b in R_execClosure /home/hornik/src/R/src/main/eval.c:2389:22
      #13 0x7f72b46a0293 in applyClosure_core /home/hornik/src/R/src/main/eval.c:2302:16
      #14 0x7f72b469aaef in Rf_applyClosure /home/hornik/src/R/src/main/eval.c:2324:16
      #15 0x7f72b469aaef in Rf_eval /home/hornik/src/R/src/main/eval.c:1280:12
      #16 0x7f72b47df3f5 in Rf_ReplIteration /home/hornik/src/R/src/main/main.c:264:15
      #17 0x7f72b47e2550 in R_ReplConsole /home/hornik/src/R/src/main/main.c:317:11
      #18 0x7f72b47e2364 in run_Rmainloop /home/hornik/src/R/src/main/main.c:1235:5
      #19 0x7f72b47e264a in Rf_mainloop /home/hornik/src/R/src/main/main.c:1242:5
      #20 0x5589d1cff004 in main /home/hornik/src/R/src/main/Rmain.c:29:5
      #21 0x7f72b393df74 in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16
      #22 0x7f72b393e026 in __libc_start_main csu/../csu/libc-start.c:360:3
      #23 0x5589d1c14380 in _start (/home/hornik/tmp/R-d-clang-xtra/bin/exec/R+0x2c380) (BuildId: bc88c46ef9240773c07d57c927010d00876dfe01)
  
  SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior refstr.c:79:29

Post-processing issues found:

File: 00check.log
refstr.c:79:29: runtime error: member access within null pointer of type 'refstr_t' (aka 'struct refstr_t')