Two HCBT_MINMAX messages on minimize




Widget: Win32
10 years ago
10 years ago


(Reporter: David Brown, Unassigned)



Windows Vista

Firefox Tracking Flags

(Not tracked)




10 years ago
User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv: Gecko/20080201 Firefox/
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv: Gecko/20080201 Firefox/

When minimizing Firefox, the window sends two HCBT_MINMAX messages instead of one.

Reproducible: Always

Steps to Reproduce:
1. Open Firefox
2. Minimize it
Actual Results:  
The Firefox window produces two HCBT_MINMAX messages

Expected Results:  
The Firefox window should only produce one HCBT_MINMAX message

Applications such as Spy++ don't appear to show HCBT messages. To verify this bug, you may need to use the C# sample that I was working on when I discovered it:

Comment 1

10 years ago
um, i don't suppose you could get us stack traces to these two calls? describes our symbol server....

stack traces would be most useful if generated based on a nightly build,

if it doesn't then there's nothing for us to do (the 2.x branch is only taking security fixes)
Component: General → Widget: Win32
Keywords: stackwanted
Product: Firefox → Core
QA Contact: general → win32
Version: unspecified → 1.8 Branch

Comment 2

10 years ago
Sorry, but I am unfamiliar with WinDbg and as this isn't a crash or a hang issue, I couldn't find any way to get a stacktrace.

I've also tested Firefox 3 Beta 3 and the latest nightly build and this issue still occurs. Again, sorry I can't be of more help.
Version: 1.8 Branch → Trunk

Comment 3

10 years ago
to get a stack trace (.hh kp), use:
to set a breakpoint on X in library Q (.hh bp), use:
bp Q!X

a starting point is probably:
bp nsWindow::SetSizeMode

I don't suppose config.trim_on_minimize is true (check in about:config), if so, it's probably this:

you can download a version of that file from and use it with windbg and the symbol server to follow along once your breakpoint is hit.
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