586910 - Windows with negative x-coordinates are impossible to open after restart

Status: RESOLVED DUPLICATE of bug 598673

(Core :: General, defect)

Description

[Drew Willcoxon :adw]

If I open a non-browser window and drag it so its x-coordinate is negative (i.e., off the left side of the screen), then when I restart Firefox and try to open that window again, nothing appears to happen.  I can view the window in the Windows menu, but when I click it there, nothing happens.  When I try to cycle to it with Cmd+`, nothing happens.  I tested with the error console, view source, and page info windows.

If I try the same with a browser window and hit Cmd+Q on the window that is partially offscreen, then on restart only the window that is offscreen appears; the original window, which was not offscreen, does not.  I can view it in the Windows menu though.  If I instead hit Cmd+Q on the original window and restart, both windows appear as expected.

Part of the problem seems to be localstore.rdf.  Offscreen windows have a negative "screenX" value, and it's these windows which I can't restore after restart.  In the browser window case, only the browser that's focused when I hit Cmd+Q is saved to localstore.rdf.  Problem is fixed after removing localstore.rdf and restarting.

Problem appears in the July 16 nightly but not the 15th's:
http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/2010-07-16-03-mozilla-central/

Which are these changesets:
http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=5fda39cd703c&tochange=96de199027d7

Which includes at least these window-related bugs:
bug 574690
bug 575222

I'm away from my development machine, so I can't see if backing them out helps.

Comment 1

[Drew Willcoxon :adw]

Possible dupes:

bug 583316
bug 586605
bug 586578
bug 585410
bug 581840
bug 583560
bug 584249

Comment 2

[Jim Mathies [:jimm]]

The patch that caused this was backed out.