calamares crashed with SIGSEGV in PartitionPage::updateButtons()

[Jb]

I had an existing Lubuntu 18.04 install with:
/dev/sda1 = 731MB ext2 (boot)
/dev/sda2 = 39.3 extended partition
/dev/sda5 = 4.8 GB swap (inside extended partition)
/dev/sda6 = 34.5G Linux (inside extended partition)

I was looking for the quick "nuke everything and install" option...but there was none??

I went to the manual screen, did nothing and went back to partitions screen. Selected Replace a partition and then clicked on a few paritions ending in I think sda2 (the extended partition?) and clicked next

Error in console was "blkid: unknown file system type "" on /dev/sda2"

I tried a few times to duplicate it but I couldn't get it to crash regardless of what I clicked on.

ProblemType: Crash
DistroRelease: Ubuntu 18.10
Package: calamares 3.2.0-1
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.10-0ubuntu2
Architecture: amd64
CasperVersion: 1.394
Date: Sun May 20 13:15:13 2018
ExecutablePath: /usr/bin/calamares
LiveMediaBuild: Lubuntu 18.10 "Cosmic Cuttlefish" - Alpha amd64 (20180519)
ProcCmdline: calamares
ProcEnviron:
 LANG=C.UTF-8
 TERM=xterm
 LANGUAGE=
 PATH=(custom, no user)
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7ff45284c833 <_ZN13PartitionPage13updateButtonsEv+419>: callq *%rdx
 PC (0x7ff45284c833) ok
 source "*%rdx" (0x55003c003e0043) not located in a known VMA region (needed readable region)!
 destination "(%rsp)" (0x7ffc1ef4d8a0) ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: calamares
StacktraceTop:
 PartitionPage::updateButtons() () from /usr/lib/x86_64-linux-gnu/calamares/modules/partition/libcalamares_viewmodule_partition.so
 PartitionPage::onPartitionModelReset() () from /usr/lib/x86_64-linux-gnu/calamares/modules/partition/libcalamares_viewmodule_partition.so
 QObject::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
 QWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
 QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
Title: calamares crashed with SIGSEGV in PartitionPage::updateButtons()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:
 PartitionPage::updateButtons (this=this@entry=0x55c8af3142c0) at ./src/modules/partition/gui/PartitionPage.cpp:149
 PartitionPage::onPartitionModelReset (this=0x55c8af3142c0) at ./src/modules/partition/gui/PartitionPage.cpp:423
 QObject::event (this=this@entry=0x55c8af3142c0, e=e@entry=0x7ff44c02f960) at kernel/qobject.cpp:1247
 QWidget::event (this=0x55c8af3142c0, event=0x7ff44c02f960) at kernel/qwidget.cpp:9346
 QApplicationPrivate::notify_helper (this=this@entry=0x55c8aef85420, receiver=receiver@entry=0x55c8af3142c0, e=e@entry=0x7ff44c02f960) at kernel/qapplication.cpp:3722

[ԜаӀtеr Ⅼарсһуnѕkі (wxl)]

Unfortunately without clear steps to reproduce this will be a difficult bug to fix. Furthermore, Lubuntu 18.10 is no longer supported. I would suggest trying again in 19.10. Perhaps try setting up the same partition scheme with 18.04 on it and see what happens. If you can't reproduce it, perhaps it was merely a fluke.

[Launchpad Janitor (janitor)]

[Expired for calamares (Ubuntu) because there has been no activity for 60 days.]