be careful reading empty lines in our config parser and prevent integer overflow...

(cherry picked from commit 83281a74766e31ff7197c7ebc4a331e9dad89e8f)

diff --git a/pdns/arguments.cc b/pdns/arguments.cc
index 9f4e1caccd8443274a641615949c2349d88023b0..c154d0e82880484388c0bc0965bd1fce92282a8f 100644 (file)
--- a/pdns/arguments.cc
+++ b/pdns/arguments.cc
@@ -390,7 +390,7 @@ bool ArgvMap::parseFile(const char *fname, const string& arg, bool lax) {
   while(getline(f,pline)) {
     trim_right(pline);
     
-    if(pline[pline.size()-1]=='\\') {
+    if(!pline.empty() && pline[pline.size()-1]=='\\') {
       line+=pline.substr(0,pline.length()-1);
       continue;
     }