545077 - Exception: An invalid or illegal string was specified: /modules/WindowsPreviewPerTab.jsm Line: 308

Status: RESOLVED WORKSFORME

(Firefox :: General, defect)

Description

[[not reading bugmail]]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.3a2pre) Gecko/20100208 Minefield/3.7a2pre (.NET CLR 3.5.30729)
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.3a2pre) Gecko/20100208 Minefield/3.7a2pre (.NET CLR 3.5.30729)

Error: [Exception... "An invalid or illegal string was specified"  code: "12" nsresult: "0x8053000c (NS_ERROR_DOM_SYNTAX_ERR)"  location: "file:///E:/Program%20Files/Minefield/modules/WindowsPreviewPerTab.jsm Line: 308"]
Source File: file:///E:/Program%20Files/Minefield/modules/WindowsPreviewPerTab.jsm
Line: 308

Reproducible: Couldn't Reproduce

Steps to Reproduce:
I was testing closing/dragging/inserting tabs with using taskbar aero peek previews.  Not even sure the STR since I wasn't watching the error console, but I did have 2 previews attached to 1 tab, and 1 tab without a preview.  Plus I had the download manager window open.
Actual Results:  
                 let scale = width/this.linkedBrowser.boxObject.width;
line 308 --->    ctx.scale(scale, scale);
                 ctx.drawImage(this.canvasPreview, 0, 0);

Comment 1

[Rob Arnold [:robarnold]]

scale must be infinity or NaN so either width (I forget which width it is at the moment) is 0 or the width of your browser content area is 0. This is an edge case that should be rather easy to handle.

Comment 2

[Gary [:streetwolf52]]

Hovering over links I am getting tons of these:

Error: preview is undefined Source File: file:///C:/Program%20Files%20(x86)/Minefield/modules/WindowsPreviewPerTab.jsm Line: 352

Latest trunk hourly introduced it

Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.3a4pre) Gecko/20100405 Minefield/3.7a4pre - Build ID: 20100405123809

Comment 3

[Rob Arnold [:robarnold]]

Do you have STR for this bug? I would like to make sure it is still happening.

Comment 4

[[not reading bugmail]]

Not yet.

Comment 5

[Tyler Downer [He/Him]]

Dennis, any STR for us? Does this still happen with Firefox 4.0 trunk?

Comment 6

[[not reading bugmail]]

I wish I did, I'm tempted to resolve this as works for me.

Comment 7

[alex_mayorga]

Is this a duplicate or a predecessor of bug 815237 perhaps?

Comment 8

[Mihai Morar, (:MihaiMorar)]

(In reply to [not reading bugmail] from comment #6)
> I wish I did, I'm tempted to resolve this as works for me.

Not able to reproduce on Latest Nightly (2013-01-27) and FF 19b3 on Windows 7 x64.

As you said in comment 6 this should be Resolved WFM.

In anyone can still reproduce this issue on latest Nightly, Aurora or Beta please reopen it.