From 39f83cf213e99e5b7c6c517268be2a3454991407 Mon Sep 17 00:00:00 2001
From: pancake <pancake@nopcode.org>
Date: Sat, 25 Sep 2021 11:43:52 +0200
Subject: [PATCH] Fix null deref when using anal.a2f ##anal

---
 libr/anal/block.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libr/anal/block.c b/libr/anal/block.c
index 39749b19a6..82a91f2f73 100644
--- a/libr/anal/block.c
+++ b/libr/anal/block.c
@@ -490,6 +490,9 @@ typedef struct {
 
 R_API bool r_anal_block_recurse_depth_first(RAnalBlock *block, RAnalBlockCb cb, R_NULLABLE RAnalBlockCb on_exit, void *user) {
 	bool breaked = false;
+	if (!block) {
+		return false;
+	}
 	HtUP *visited = ht_up_new0 ();
 	if (!visited) {
 		goto beach;