diff -r 47e0f2237a94 -r 67e078518935 src/buffer.c
--- a/src/buffer.c	Sun May 01 10:39:13 2022 +0200
+++ b/src/buffer.c	Sun May 01 11:44:23 2022 +0200
@@ -57,6 +57,7 @@
     buffer->pos = 0;
 
     buffer->flush_func = NULL;
+    buffer->flush_target = NULL;
     buffer->flush_blkmax = 0;
     buffer->flush_blksize = 4096;
     buffer->flush_threshold = SIZE_MAX;