App server heap corruption-related crashes

[anevilyak]

On several different occasions in the past week or two I've encountered crashes that look something like the following:

#1: debugger()
#2: __assert_fail()
#3: BPrivate::hoardHeap:findAvailableSuperblock()
#4: BPrivate::threadHeap::malloc()
#5: malloc()
#6; operator new()
#7-#13 - various ops chaining off an std::map<long,
BPrivate::BTokenSpace::token_info> insertion.
#14: BPrivate::BTokenSpace::SetToken(this=0x18055f58, token=35,
type=1, object=0x1861a048)
#15: View::AttachedToWindow()
#16: View::AddChild()
#17: ServerWindow::_DispatchMessage()
#18: ServerWindow::_MessageLooper()
#19: MessageLooper::_message_thread()
#20: thread_entry()

Pardon the lack of detail but alt+sysrq+d appears to be unusable from the gdb session used for app_server crashes. I've encountered this one while trying to reproduce #4343, and #698.

[jackburton]

tried F12 by chance ? I think it's still mapped to it while in the app_server gdb session.

[anevilyak]

Was not aware of that, will try next time.

[bonefish]

Assertion in the same function reported in #4164. Doesn't contain any more helpful info either, though.

[waddlesplash]

Anyone seen these since?

[nielx]

Remove milestone for tickets with status = closed and resolution != fixed