baobab crashed with SIGSEGV in gtk_tree_model_get_valist()

[El jinete sin cabeza]

https://gitlab.gnome.org/GNOME/baobab/issues/20

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[Impact]
By opening the 'baobab' program and choosing to set up a <email address hidden> account, and then setting up the gmail account. And I hit a click to open a folder of <email address hidden> crashes 'baobab'.

[Test Case]
1. Open baobab
2. Mount <email address hidden>
3. Wait for the content of the account <email address hidden> to be displayed in baobab
3. Select a folder of the account <email address hidden>
4. Click on it to display the options in that folder
5. Select 'Open Folder'
6. baobab crashes

Original Description
--------------------
Opening a folder in baobab with connection to google drive.

ProblemType: Crash
DistroRelease: Ubuntu 19.04
Package: baobab 3.32.0-1
Uname: Linux 5.0.6-050006-generic x86_64
ApportVersion: 2.20.10-0ubuntu25
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri Apr 5 17:40:41 2019
ExecutablePath: /usr/bin/baobab
InstallationDate: Installed on 2018-12-02 (124 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
ProcCmdline: /usr/bin/baobab --gapplication-service
ProcEnviron:
 SHELL=/bin/bash
 XDG_RUNTIME_DIR=<set>
 PATH=(custom, no user)
 LANGUAGE=es_CL:es
 LANG=es_CL.UTF-8
SegvAnalysis:
 Segfault happened at: 0x7f57537d00ee <gtk_tree_model_get_valist+286>: mov 0x30(%rax),%rdi
 PC (0x7f57537d00ee) ok
 source "0x30(%rax)" (0x00000030) not located in a known VMA region (needed readable region)!
 destination "%rdi" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: baobab
StacktraceTop:
 gtk_tree_model_get_valist () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
 gtk_tree_model_get () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
 baobab_window_open_item ()
 ?? ()
 g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
Title: baobab crashed with SIGSEGV in gtk_tree_model_get_valist()
UpgradeStatus: Upgraded to disco on 2018-12-02 (124 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
separator:

[Apport retracing service (apport)]

StacktraceTop:
 gtk_tree_model_get_valist (tree_model=tree_model@entry=0x55b69f8a84c0, iter=iter@entry=0x7ffd7935b4f0, var_args=var_args@entry=0x7ffd7935b3d0) at ../../../../gtk/gtktreemodel.c:1800
 gtk_tree_model_get (tree_model=0x55b69f8a84c0, iter=iter@entry=0x7ffd7935b4f0) at ../../../../gtk/gtktreemodel.c:1762
 baobab_window_open_item (self=self@entry=0x55b69f228450, iter=iter@entry=0x7ffd7935b580) at ../src/baobab-window.vala:375
 __lambda17_ (self=0x55b69f228450) at ../src/baobab-window.vala:432
 ___lambda17__gtk_menu_item_activate (_sender=<optimized out>, self=0x55b69f228450) at ../src/baobab-window.vala:428

[El jinete sin cabeza (ejsc)]

https://gitlab.gnome.org/GNOME/baobab/issues/20