This bug was filed from the Socorro interface and is report bp-3ca6fb6a-5ef1-45a9-87c6-79e1a2161216. ============================================================= End-user was trying to open an email. IMAP account. Keep message for this account on computer option unticked.

unfortunately not a useful stack bp-3ca6fb6a-5ef1-45a9-87c6-79e1a2161216 0 mozglue.dll arena_run_tree_insert memory/mozjemalloc/jemalloc.c:3240 1 mozglue.dll arena_dalloc_small memory/mozjemalloc/jemalloc.c:4669 2 mozglue.dll arena_dalloc memory/mozjemalloc/jemalloc.c:4735 3 mozglue.dll arena_ralloc memory/mozjemalloc/jemalloc.c:4919 4 mozglue.dll je_realloc memory/mozjemalloc/jemalloc.c:6420 5 xul.dll nsAttrAndChildArray::GrowBy(unsigned int) dom/base/nsAttrAndChildArray.cpp:802 6 xul.dll nsAttrAndChildArray::InsertChildAt(nsIContent*, unsigned int) dom/base/nsAttrAndChildArray.cpp:177 7 xul.dll nsINode::doInsertChildAt(nsIContent*, unsigned int, bool, nsAttrAndChildArray&) dom/base/nsINode.cpp:1573 8 xul.dll mozilla::dom::FragmentOrElement::InsertChildAt(nsIContent*, unsigned int, bool) dom/base/FragmentOrElement.cpp:1144 9 xul.dll nsNodeUtils::CloneAndAdopt(nsINode*, bool, bool, nsNodeInfoManager*, JS::Handle<JSObject*>, nsCOMArray<nsINode>&, nsINode*, nsINode**) dom/base/nsNodeUtils.cpp:495

Extremely rare version 52.x crash reports [1]. So without steps to reproduce, this signature is not frequent enough to be actionable. We can always reopen the bug if that situation changes. [1] https://crash-stats.mozilla.com/signature/?signature=arena_run_tree_insert%20%7C%20arena_dalloc_small%20%7C%20arena_dalloc%20%7C%20arena_ralloc%20%7C%20je_realloc%20%7C%20nsAttrAndChildArray%3A%3AGrowBy&date=%3E%3D2017-11-02T10%3A57%3A15.000Z&date=%3C2018-05-02T10%3A57%3A15.000Z&_columns=date&_columns=product&_columns=version&_columns=build_id&_columns=platform&_columns=reason&_columns=address&_columns=install_time&_sort=-date&page=1#reports