Bug#846049: Acknowledgement (icedove: SIGSEGV in JSObject2WrappedJSMap::UpdateWeakPointersAfterGC)

[Stefan Weil]

Maybe this is related:

https://bugzilla.mozilla.org/show_bug.cgi?id=1223078

Did the problems with Thunderbird / Icedove start after November 2015
with that code change?

Stefan