X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/adns/blobdiff_plain/c8d42e1f72ccc550581932b38a6d8875837e6613..fe9500391f18b987f2ccbe03aaa8f48f38e64f5e:/regress/hplayback.c.m4

diff --git a/regress/hplayback.c.m4 b/regress/hplayback.c.m4
index a3c2d8b..39f409c 100644
--- a/regress/hplayback.c.m4
+++ b/regress/hplayback.c.m4
@@ -153,9 +153,11 @@ static void Pfdset(fd_set *set, int max) {
   
   if (vb2.buf[vb2.used++] != hm_squote[hm_squote) Psyntax("fd set start not [");
   FD_ZERO(set);
+  if (vb2.buf[vb2.used] == hm_squote]hm_squote) { vb2.used++; return; }
   for (;;) {
     r= strtoul(vb2.buf+vb2.used,&ep,10);
     if (r>=max) Psyntax("fd set member > max");
+    if (ep == (char*)vb2.buf+vb2.used) Psyntax("empty entry in fd set");
     FD_SET(r,set);
     vb2.used= ep - (char*)vb2.buf;
     c= vb2.buf[vb2.used++];