fix app selector crash

[ghost]

No description provided.

[mechanico]

I can confirm that the fixes worked for me, with a jailbroken iOS 10.2 device. I still had some issues with some idb functions, but the application did no longer crash on app selection.

[pandasauce]

Works well on iOS 11.1 with a Mac, doesn't fix the issue on Linux.

[Mr007jd]

same issue with ios 12.1.1 uncover jalibreak:
on linux
stack trace:

[INFO] 2019-04-25 18:55:13 :: idb :: Locating application binary...

[DEBUG] 2019-04-25 18:55:21 :: idb :: File not found: Net::SFTP::StatusException (2, "no such file")
[DEBUG] 2019-04-25 18:55:21 :: idb :: File not found: Net::SFTP::StatusException (2, "no such file")
[DEBUG] 2019-04-25 18:55:21 :: idb :: Executing blocking SSH command: /usr/bin/ldid -e '/private/var/containers/Bundle/Application/32695BFF-A624-404C-9FED-5F888EFC1910//Dream11.app/Dream11'
#Plist4r::Plist:0x0000555ccb44a250
[DEBUG] 2019-04-25 18:55:21 :: idb :: Executing blocking SSH command: /usr/bin/ldid -e '/private/var/containers/Bundle/Application/32695BFF-A624-404C-9FED-5F888EFC1910//Dream11.app/Dream11'
#Plist4r::Plist:0x0000555cca849208
[DEBUG] 2019-04-25 18:55:21 :: idb :: Executing blocking SSH command: /usr/bin/ldid -e '/private/var/containers/Bundle/Application/32695BFF-A624-404C-9FED-5F888EFC1910//Dream11.app/Dream11'
#Plist4r::Plist:0x0000555cccb4ed98
Traceback (most recent call last):
24: from /usr/local/bin/idb:23:in <main>' 23: from /usr/local/bin/idb:23:in load'
22: from /var/lib/gems/2.5.0/gems/idb-2.10.3/bin/idb:4:in <top (required)>' 21: from /var/lib/gems/2.5.0/gems/idb-2.10.3/lib/idb.rb:278:in run'
20: from /var/lib/gems/2.5.0/gems/qtbindings-4.8.6.5/lib/Qt/qtruby4.rb:479:in exec' 19: from /var/lib/gems/2.5.0/gems/qtbindings-4.8.6.5/lib/Qt/qtruby4.rb:479:in method_missing'
18: from /var/lib/gems/2.5.0/gems/qtbindings-4.8.6.5/lib/Qt/qtruby4.rb:479:in qt_metacall' 17: from /var/lib/gems/2.5.0/gems/qtbindings-4.8.6.5/lib/Qt/qtruby4.rb:2470:in invoke'
16: from /var/lib/gems/2.5.0/gems/idb-2.10.3/lib/gui/global_app_details_group_box.rb:63:in block in initialize' 15: from /var/lib/gems/2.5.0/gems/qtbindings-4.8.6.5/lib/Qt/qtruby4.rb:917:in exec'
14: from /var/lib/gems/2.5.0/gems/qtbindings-4.8.6.5/lib/Qt/qtruby4.rb:917:in method_missing' 13: from /var/lib/gems/2.5.0/gems/qtbindings-4.8.6.5/lib/Qt/qtruby4.rb:917:in qt_metacall'
12: from /var/lib/gems/2.5.0/gems/qtbindings-4.8.6.5/lib/Qt/qtruby4.rb:2470:in invoke' 11: from /var/lib/gems/2.5.0/gems/idb-2.10.3/lib/gui/app_list_dialog.rb:24:in block in initialize'
10: from /var/lib/gems/2.5.0/gems/idb-2.10.3/lib/gui/app_list_dialog.rb:24:in method_missing' 9: from /var/lib/gems/2.5.0/gems/idb-2.10.3/lib/gui/app_list_dialog.rb:24:in qt_metacall'
8: from /var/lib/gems/2.5.0/gems/qtbindings-4.8.6.5/lib/Qt/qtruby4.rb:2470:in invoke' 7: from /var/lib/gems/2.5.0/gems/idb-2.10.3/lib/gui/global_app_details_group_box.rb:61:in block (2 levels) in initialize'
6: from /var/lib/gems/2.5.0/gems/idb-2.10.3/lib/gui/global_app_details_group_box.rb:61:in app_changed' 5: from /var/lib/gems/2.5.0/gems/idb-2.10.3/lib/gui/global_app_details_group_box.rb:61:in qt_metacall'
4: from /var/lib/gems/2.5.0/gems/qtbindings-4.8.6.5/lib/Qt/qtruby4.rb:2470:in invoke' 3: from /var/lib/gems/2.5.0/gems/idb-2.10.3/lib/idb.rb:122:in block in init_ui'
2: from /var/lib/gems/2.5.0/gems/idb-2.10.3/lib/gui/main_tab_widget.rb:163:in app_changed' 1: from /var/lib/gems/2.5.0/gems/idb-2.10.3/lib/gui/app_tab_widget.rb:48:in app_changed'
/var/lib/gems/2.5.0/gems/idb-2.10.3/lib/gui/app_details_group_box.rb:69:in app_changed': undefined method sub' for {"$class"=>nil, "snapshots"=>nil, "identifier"=>nil}:Hash (NoMethodError)
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