@@ -2771,6 +2771,9 @@ int cli_bytecode_runlsig(cli_ctx *cctx, struct cli_target_info *tinfo,

     const struct cli_bc *bc = &bcs->all_bcs[bc_idx-1];

     struct cli_pe_hook_data pehookdata;

+    if (bc_idx == 0) 

+        return CL_ENULLARG;

+

     memset(&ctx, 0, sizeof(ctx));

     cli_bytecode_context_setfuncid(&ctx, bc, 0);

     ctx.hooks.match_counts = lsigcnt;