after some message saying copy or so failed, it crashed

[yosin]

I was installing Ubuntu 18.04.2 in a SSD from DVD I burnt.
This is the second time the installer crashed.
From the same DVD, I succeeded an install with another machine.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubiquity 18.04.14.12
ProcVersionSignature: Ubuntu 4.18.0-15.16~18.04.1-generic 4.18.20
Uname: Linux 4.18.0-15-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
CasperVersion: 1.394
CurrentDesktop: ubuntu:GNOME
Date: Sun Apr 14 01:56:25 2019
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd quiet splash --- maybe-ubiquity
LiveMediaBuild: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
ProcEnviron:
 LANGUAGE=en_US.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 LC_NUMERIC=C.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Paul White (paulw2u)]

We are sorry that we do not always have the capacity to review all reported bugs in a timely manner.

The following errors can be found in UbiquitySyslog.txt which was automatically attached to this bug report:

Apr 13 16:56:02 ubuntu kernel: [ 1189.977984] SQUASHFS error: zlib decompression failed, data probably corrupt
Apr 13 16:56:02 ubuntu kernel: [ 1189.977988] SQUASHFS error: squashfs_read_data failed to read block 0x2d079a92

It's possible you had a bad write to your media or for some other reason its contents could not be read. When having such problems please try the option to check the integrity of the image from the installer boot menu, and if this confirms that the media is corrupt, try re-writing and/or re-downloading it.