I crash when I (a) send a web page via email from Navigator *and* (b) backspace in the addressing widget of the compose window. Running 2001-05-17-04 (commercial) on WinNT. I can reproduce this about 75% of the time. It seems that following a particular order of steps is very important in reproducing this bug. Steps to reproduce. 1. Launch MoJo. 2. Launch Mail (Tasks | Mail). Authenticate to email server when prompted. I'm using IMAP. 3. Go back to Navigator. Browse to a site - say, http://www.mozilla.org/ 4. Send the web page via email (File | Send Page ...). 5. *As soon as you see the cursor* in the addressing widget in the email compose window, begin typing, and then - after you've typed about 5 characters - quickly start hitting the backspace key (like you made a mistake in your typing and want to correct it right away). Note - I have configured email addressing to run against my LDAP server at work. Expected result: The text you have typed in the addressing widget is deleted, and the cursor backspaces. Actual result: CRASH!! Stack trace: Trigger Type: Program Crash Trigger Reason: Access violation Thread ID: 203 Call Stack: (Signature = nsLDAPAutoCompleteSession::FinishAutoCompleteLookup 8ed50941) nsLDAPAutoCompleteSession::FinishAutoCompleteLookup [d:\builds\seamonkey\mozilla\xpfe\components\autocomplete\src\nsLDAPAutoComplete Session.cpp, line 923] nsLDAPAutoCompleteSession::OnLDAPSearchResult [d:\builds\seamonkey\mozilla\xpfe\components\autocomplete\src\nsLDAPAutoComplete Session.cpp, line 601] nsLDAPAutoCompleteSession::OnLDAPMessage [d:\builds\seamonkey\mozilla\xpfe\components\autocomplete\src\nsLDAPAutoComplete Session.cpp, line 327] Notes: Seems to be crashing in LDAP code. For more information, see Talkback incidents: 30630928 and 30631144 (identical stack traces).

Looks like a LDAP problem, reassign to dmose

are the options 1) fix the crash or 2) take out the feature??

chofmann: a third option would be to release note it. My impression is that this crash isn't all that common, and the easy workaround is to disable LDAP in the prefs. I've been able to reproduce this maybe twice (out of about 10 attempts) running on Linux with the release build. Unfortunately, I've never seen it under debug builds at all (let alone while running under the debugger) after about 30 attempts, so it's a very timing sensitive thing. Haven't been able to catch it under the debugger on Mac either; Srilatha's had similar experiences on windows; she's going to try over a slower connection once she gets home this evening. However, from reading the code, I have a guess as to what could be happening. I'm gonna go grovel through the code some more, and will post my thoughts in a bit.

OK, after grovelling through the source for a while (and thanks to talkback) I see what could cause this crash. With luck I'll have a patch later tonight.

I've just attached a minimal paper-over-the-problem fix. With just this patch, the race still exists, but if we lose the race, the result will just be a confused autocomplete session rather than a crash. Worst case, I'd suggest shipping with this patch. However, I expect that with a few more hours of work tommorrow (Weds), I'll have a better patch that includes this paper-over fallback, but also eliminates the race entirely.

OK, I've got the real fix. A side-effect of this fix is that the race described in 70422 is fixed also.

Actually, the side effect is that 77452 is fixed, NOT 70422.

who should be the reviewer?

ducarroz, hewitt, or chuang. mscott would make a fine sr=. :-)

the patch looks good. R=ducarroz

This has been built and tested on all three platforms.

sr=mscott

a= asa@mozilla.org for checkin to 0.9.1

Fix checked in.

Using build 2001-05-31 on mac, linux and windows this is fixed. Verified. I added the LDAP directory and went back to a 5-23 build to see the crash. I then ran sol's test on all three platforms and did not crash.