[Bug 1962422] [NEW] grub crash at install ubuntu16.04 amd64(win10 already installed)

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Public bug reported:

grub crash at install ubuntu16.04 amd64(win10 already installed)

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubiquity 2.21.63.11
ProcVersionSignature: Ubuntu 4.15.0-112.113~16.04.1-generic 4.15.18
Uname: Linux 4.15.0-112-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.24
Architecture: amd64
CasperVersion: 1.376.2
Date: Mon Feb 28 16:42:31 2022
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu 16.04.7 LTS "Xenial Xerus" - Release amd64 (20200806)
ProcEnviron:
 LANGUAGE=zh_CN.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=zh_CN.UTF-8
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: grub-installer (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug ubiquity-2.21.63.11 ubuntu xenial

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https://bugs.launchpad.net/bugs/1962422

Title:
  grub crash at install ubuntu16.04 amd64(win10 already installed)

Status in grub-installer package in Ubuntu:
  New

Bug description:
  grub crash at install ubuntu16.04 amd64(win10 already installed)

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubiquity 2.21.63.11
  ProcVersionSignature: Ubuntu 4.15.0-112.113~16.04.1-generic 4.15.18
  Uname: Linux 4.15.0-112-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.24
  Architecture: amd64
  CasperVersion: 1.376.2
  Date: Mon Feb 28 16:42:31 2022
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity quiet splash ---
  LiveMediaBuild: Ubuntu 16.04.7 LTS "Xenial Xerus" - Release amd64 (20200806)
  ProcEnviron:
   LANGUAGE=zh_CN.UTF-8
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=zh_CN.UTF-8
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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