Bug 253268

Summary:	`zfs send` immediately stops with "Assertion failed: (progress)"
Product:	Base System	Reporter:	Lapo Luchini <lapo>
Component:	bin	Assignee:	freebsd-bugs (Nobody) <bugs>
Status:	New ---
Severity:	Affects Some People
Priority:	---
Version:	12.2-RELEASE
Hardware:	amd64
OS:	Any

Description Lapo Luchini 2021-02-05 10:43:28 UTC

I reported this to the mailing list already, but it is probably better to track this as an open PR, while it stands as it is.

https://lists.freebsd.org/pipermail/freebsd-fs/2021-January/028551.html

$ sudo zfs send -Rv z at recentSnapshot >a
Assertion failed: (progress), file 
/usr/src/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_sendrecv.c, 
line 1511.
% ls -al a
-rw-r--r--  1 lapo  users  694992 21 gen 14:26 a
% zstreamdump <a | fgrep "      name =" | wc -l
      65
% zfs list -Hr z | wc -l
      65
% freebsd-version
12.2-RELEASE-p2