X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/f47dbf6befd8c97f385bb1c7a3902e9563018b7c..983c5c2c2a4cc5b1dbd63236ad1215d2a113391e:/src/getargs.c

diff --git a/src/getargs.c b/src/getargs.c
index 23b06394..ffdff8ab 100644
--- a/src/getargs.c
+++ b/src/getargs.c
@@ -355,7 +355,8 @@ getargs (int argc, char *argv[])
       case 'g':
 	/* Here, the -g and --graph=FILE options are differentiated.  */
 	graph_flag = 1;
-	spec_graph_file = AS_FILE_NAME (optarg);
+	if (optarg)
+	  spec_graph_file = AS_FILE_NAME (optarg);
 	break;
 
       case 'v':