calling fwrite() with a null pointer causes undefined behavior. avoid it.

2021-09-25 10:18:55 -04:00
parent 530912a930
commit 53e773e438
5 changed files with 10 additions and 5 deletions
--- a/src/dump_atom.cpp
+++ b/src/dump_atom.cpp
@ -562,7 +562,8 @@ void DumpAtom::write_binary(int n, double *mybuf)

 void DumpAtom::write_string(int n, double *mybuf)
 {
-  fwrite(mybuf,sizeof(char),n,fp);
+  if (mybuf)
+    fwrite(mybuf,sizeof(char),n,fp);
 }

 /* ---------------------------------------------------------------------- */