APREPRO: Check for valid index to get_word()

sandialabs · Oct 18, 2024 · 63814bd · 63814bd
1 parent c253bb9
commit 63814bd
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/packages/seacas/libraries/aprepro_lib/apr_builtin.cc b/packages/seacas/libraries/aprepro_lib/apr_builtin.cc
@@ -683,6 +683,10 @@ namespace SEAMS {
     auto &tokens = get_tokenized_strings(string, delm);
 
     auto in = static_cast<size_t>(n);
+    if (in == 0) {
+      aprepro->error("Index to get_word must be positive.", false);
+      return "";
+    }
     if (tokens.size() >= in) {
       char *word = nullptr;
       new_string(tokens[in - 1], &word);