X-Git-Url: https://git.wirehaze.ovh/graph-theory.git/blobdiff_plain/5638cc2d0dc28b74e32271de100952c0b305ef37..0cafaf72753a31d47e96bc8318b70ad8db215e6f:/graph/adj.c

diff --git a/graph/adj.c b/graph/adj.c
index dfcf036..fbad922 100644
--- a/graph/adj.c
+++ b/graph/adj.c
@@ -127,6 +127,9 @@ free_graph (struct graph *g)
   struct vertex *v;
   unsigned int i;
 
+  if (!g)
+    return;
+
   for (i = 0; i < g->nv; ++i)
     {
       v = &g->v[i];