LVM2 snapshot merge error report: "lvm crashed with SIGSEGV in lv_is_merging_cow()"

Xubuntu 14.04.4 LTS
SSD is only drive (/dev/sda)
/dev/sda1 is boot partition
/dev/sda5 is encrypted LUKS partition
logical volumes sit on top of the LUKS partition

package: lvm2 2.02.98-6ubuntu2
problem type: Crash
title: lvm crashed with SIGSEGV in lv_is_merging_cow()

This bug is repeatable. If I create a LVM snapshot of lvroot (mounted to /) and run lvconvert --merge to restore the snapshot, after rebooting, this error report is generated.

However, if instead of running lvconvert --merge inside the system, I boot into a live ISO session and run lvconvert --merge, the process completes without any error being reported.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: lvm2 2.02.98-6ubuntu2
ProcVersionSignature: Ubuntu 4.2.0-41.48~14.04.1-generic 4.2.8-ckt11
Uname: Linux 4.2.0-41-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.21
Architecture: amd64
CurrentDesktop: XFCE
Date: Thu Jul 7 11:36:56 2016
InstallationDate: Installed on 2016-07-02 (5 days ago)
InstallationMedia: Xubuntu 14.04.4 LTS "Trusty Tahr" - Release amd64 (20160217.1)
ProcEnviron:
 LANGUAGE=en_US
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: lvm2
UpgradeStatus: No upgrade log present (probably fresh install)