[Bug 1683653] Re: Caja crashes when opening D/L folder from Firefox

[Vlad Orlov]

[Impact]

Opening download folder from Firefox results in
UI freeze for the whole session. Some keyboard
shortcuts might still work, but mouse doesn't.
Need to kill Firefox to unfreeze the system.

The patch attached to this report fixes the issue.

The fix is already present in Artful and tested by
developers and users. Would be nice to backport it
to Zesty as well, as the whole session freeze is
quite a bad thing (even though you can stop it).

[Test Case]

Steps to reproduce:
- have a terminal running
- run Firefox
- download some file from somewhere
- click on download button to show the file list
- click on "open containing folder" button

Most UI apps will freeze after that.
As Alt-Tab shortcut still works, use it to switch
to terminal and run "killall firefox".

[Regression Potential]

None. The UI freeze *is* the regression. The patch
restores the missing DBus interface initialization
and affects nothing else.

[Other Info]

The patch is included into the debdiff attached to
bug 1680604.

The debdiff contains patches to fix bug 1680604,
bug 1683653, bug 1688687. See other reports for the
corresponding SRU templates.

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https://bugs.launchpad.net/bugs/1683653

Title:
  Caja crashes when opening D/L folder from Firefox

Status in caja package in Ubuntu:
  Fix Released
Status in caja source package in Zesty:
  Triaged

Bug description:
  Expected:

  Using Firefox 52.02, when File download finishes, opening "Display the
  progress of ongoing Downloads" (arrow on Right of address bar), then
  selecting "Open Containing Folder" icon from Firefox opens Downloads
  folder on system.

  What happens:

  Using Firefox 52.02, when File download finishes, opening "Display the
  progress of ongoing Downloads" (arrow on Right of address bar), then
  selecting "Open Containing Folder" icon from Firefox, causes system to
  hang/crash for period of 2 minutes; (opening menu's, shutdown button,
  opening any program at all, etc). Sometimes only way to get response
  from system is shutdown/restart.

  Steps to reproduce:

  1. Start Ubuntu MATE 17.04.
  2. Run Firefox.
  3. Browse to any site.
  4. Download a file from site.
  5. Wait until Download arrow indicator next to address bar arrow on Firefox indicates a completed download.
  6.Click on arrow next to/on right address bar "Display the progress of ongoing Downloads".
  7. Click on icon "Open Containing Folder".
  8. Computer will then freeze/hang/crash for a period of at least 2 minutes.

  Additional notes:

  1.Computer is unresponsive at this time, menu's are unresponsive, run
  application [ALT+ F2] unresponsive, Tabs on Firefox Browser
  unresponsive, any other programs running unresponsive, unable to
  close/open any programs.

  1a. Note: This unresponsive period may last 2 minutes, or sometimes
  will only become responsive after killing Firefox process.

  2.The date/time applet will still update however. Other applets
  unresponsive.

  3. Terminal can be run [ALT+ CNRL+T].

  4. Terminal will allow "pidof" to be run, to find PID of Firefox.

  5. Firefox can be then "killed" by "kill [pid] xxx" via terminal.
  Computer becomes responsive again.

  6. Running Ubuntu Mate 17.04 from a bootable USB results in the same
  thing/problem happening.

  7.Same problem happens with Firefox Version 51.

  8. Downgrade to 16.10 on same machine, no problem occurs.

  9. No crash error report in "about:crashes" in Firefox built in
  diagnostics.

  
  Computer Specs:

  X220 Lenevo/i5/16GB RAM/250GB SSD

  Thank-you.

  (Please let me know if I have done any of this incorrectly or need any
  other information. First Bug report!)

  ~L.

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