package bcmwl-kernel-source 6.30.223.271+bdcom-0ubuntu1~1.1 failed to install/upgrade: subprocess installed post-installation script was killed by signal (Terminated) crashes after login as desktop is loading

[David Sloan]

tried to update using software updater
restarted per updater's instructions
after logging in, as soon as the desktop appeared the error was there

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: bcmwl-kernel-source 6.30.223.271+bdcom-0ubuntu1~1.1
ProcVersionSignature: Ubuntu 4.4.0-64.85-generic 4.4.44
Uname: Linux 4.4.0-64-generic x86_64
NonfreeKernelModules: wl nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
Date: Thu Mar 2 17:32:32 2017
ErrorMessage: subprocess installed post-installation script was killed by signal (Terminated)
InstallationDate: Installed on 2016-10-15 (138 days ago)
InstallationMedia: Ubuntu-GNOME 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160720)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.19
SourcePackage: bcmwl
Title: package bcmwl-kernel-source 6.30.223.271+bdcom-0ubuntu1~1.1 failed to install/upgrade: subprocess installed post-installation script was killed by signal (Terminated)
UpgradeStatus: No upgrade log present (probably fresh install)