crash [@ arena_run_reg_dalloc] [@ arena_dalloc_small] never had this crash before. only unusual thing done was yesterday I had turned on high contrast mode in windows a couple times using alt+shift+printscreen 5 same top of stack on crash-stats but none are same stack: bp-9f70b90c-1504-11dd-b9b0-001321b13766 bp-80551659-183d-11dd-b02f-001cc45a2c28 bp-2c37e378-1b14-11dd-b0ad-001cc4e2bf68 bp-d2f51acc-17ee-11dd-80fe-0013211cbf8a bp-4ade48a-19c0-11dd-85b4-001a4bd46e84 my crash bp-bbc89582-1db2-11dd-8377-001321b13766 Signature arena_run_reg_dalloc UUID bbc89582-1db2-11dd-8377-001321b13766 Time 2008-05-09 03:28:05-07:00 Uptime 570157 Product Firefox Version 3.0pre Build ID 2008042305 OS Windows NT OS Version 6.0.6000 CPU x86 CPU Info GenuineIntel family 6 model 15 stepping 6 Crash Reason EXCEPTION_ACCESS_VIOLATION Crash Address 0xce1fb5c Comments opening a new tab clicked in [from] Thunderbird 0 mozcrt19.dll arena_run_reg_dalloc jemalloc.c:2871 1 mozcrt19.dll arena_dalloc_small jemalloc.c:4083 2 mozcrt19.dll arena_dalloc jemalloc.c:4185 3 mozcrt19.dll free jemalloc.c:6035 4 xul.dll ReleaseData mozilla/xpcom/string/src/nsSubstring.cpp:116 5 xul.dll CAttributeToken::`scalar deleting destructor' 6 xul.dll CToken::Destroy nsToken.h:147 7 xul.dll CToken::Release nsToken.h:169 8 xul.dll nsCParserStartNode::~nsCParserStartNode mozilla/parser/htmlparser/src/nsParserNode.h:308 9 xul.dll nsCParserStartNode::`vector deleting destructor' 10 xul.dll CNavDTD::HandleStartToken mozilla/parser/htmlparser/src/CNavDTD.cpp:1453 11 xul.dll CNavDTD::HandleToken mozilla/parser/htmlparser/src/CNavDTD.cpp:760 12 xul.dll xul.dll@0x6e94ef

How are the steps to reproduce the crashes?

Lucas 1. [only unusual thing done] turned on high contrast mode in windows a couple times using alt+shift+printscreen 2. "opening a new tab clicked in [a message in] Thunderbird"

Some suggestions: 1) update to the latest version (menu Help -> Check for Updates), restart and apply the update, close Firefox, create a new profile ( http://kb.mozillazine.org/Creating_a_new_Firefox_profile_on_Windows ), start Firefox with the new profile and test if Firefox crashes again. 2) without high contrast mode, all works without problem? 3) if I understood well, you clicked a link in a email message in Thunderbird. Firefox tried to open the link but it crashed. It happens with all links in email, or only for one link? It happens also with URL links from other programs? 4) What is the version of your Thunderbird? 5) Post here also your build identifier: menu Help -> About Minefield. The identifier is something like this: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9pre) Gecko/2008051306 Minefield/3.0pre

I should have put in more detail when I still remembered wth I was doing. 1. I must have tried it again using newer build 2008050906 and got the same problem, before filing the bug 2. clicking links normally works, never had such a problem before (never use high contrast - was testing a bug about it) 3. don't recall if i tried from other programs 4. version 3.0a1 (2008050715) 5. Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9pre) Gecko/2008050906 Minefield/3.0pre

Well, I assume this problem happens to you for all Thunderbird links. related to 3 and 4: Could you try to test this bug with Thunderbird 2 and with other programs? related to 1: do you tested it with a new profile? PS: your Firefox is not up to date to the latest trunk, anyway :-)

don't want to leave you hanging ... sorry, I won't be testing further (other priorities). Pretty easy for you to try - alt+shift+printscreen is a toggle, completely non-destructive. But I'm reasonably certain it shouldn't be happening, even if thunderbird sent Fx an ill-formed URL Also, I frequently click links in messages in both trunk and release builds. So I suspect alt+shift+printscreen is the key, as all other habits/factors in my usage at the time were unchanged.

I found the problem. It happens when you set Firefox 3 as your default browser, but you don't start a profile by default ("Don't ask at startup" unchecked in Profile Manager). This problem doesn't happen with Firefox 2. (Workaround: set Firefox 2 as the default browser, or check "Don't ask at startup" in Profile Manager). Can anyone confirm and set the bug as "New"? Tested with: Thunderbird 3.0a2pre (2008051303) Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9pre) Gecko/2008051306 Minefield/3.0pre

those are my settings. A similar FIXED bug is Bug 370123 – Crash while starting Firefox with a Web-Shortcut and enabled Profile Manager Perhaps Rob can speculate whether bug 370123 fixed what he and spitzer were doing in Bug 295248 – Crash if opening a link (from Thunderbird) when profile picker window is open. Unlike that bug however, I don't recall having the picker open Lucas, You were able to make it crash?

Bug 370123 didn't fix Bug 295248 and the fix for Bug 295248 or Bug 395891. Our startup implementation is going to need some massive rework to fix this and an ETA on doing this is unknown.

(In reply to comment #8) > Lucas, You were able to make it crash? > No, it simply doesn't start. (In reply to comment #9) > Bug 370123 didn't fix Bug 295248 and the fix for Bug 295248 or Bug 395891 > So I think this bug is a duplicate of Bug 395891, right?

(In reply to comment #10) >... > So I think this bug is a duplicate of Bug 395891, right? Yes

not sure I agree with the dupe, because I've never had this crash before, the stacks don't seem (to me) to match up, etc. But I am unable to recreate the crash. So I will trust Rob's judgment.

I wouldn't expect the stacks to match up with all of the changes and chances are bug 395891 will fix this bug when it is fixed. If you want to reopen please do so.