[Bug 1868015] Re: package grub-pc 2.02-2ubuntu8.15 failed to install/upgrade: installed grub-pc package post-installation script subprocess was killed by signal (Terminated)

during upgrade from 16.04 to 18.04, system popup a dialog, say the grub config file has been modified. Ask whether to keep the modified configure or replace with a new one. I choose the last option: rerun a shell script to detect the situation again. Then an hour passed and the dialog lock into a s

[Bug 1868015] [NEW] package grub-pc 2.02-2ubuntu8.15 failed to install/upgrade: installed grub-pc package post-installation script subprocess was killed by signal (Terminated)

Public bug reported: when upgrade from 16.04 to 18.04 ProblemType: Package DistroRelease: Ubuntu 18.04 Package: grub-pc 2.02-2ubuntu8.15 ProcVersionSignature: Ubuntu 4.15.0-29.31~16.04.1-generic 4.15.18 Uname: Linux 4.15.0-29-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.12 Architecture: amd64 Da