100% of the crash are on 32-bit x86.
Windows 7 is overrepresented: 80.92% of the crashes are on Windows 7.

Crash report: https://crash-stats.mozilla.org/report/index/1869d781-625b-4ab5-998f-6ef5b0211017

MOZ_CRASH Reason: MOZ_CRASH()

Top 10 frames of crashing thread:

0 mozglue.dll mozalloc_abort memory/mozalloc/mozalloc_abort.cpp:33
1 mozglue.dll mozalloc_handle_oom memory/mozalloc/mozalloc_oom.cpp:51
2 xul.dll mozglue_static::oom_hook::hook mozglue/static/rust/lib.rs:115
3 xul.dll std::alloc::rust_oom ../c8dfcfe046a7680554bf4eb612bad840e7631c4b//library/std/src/alloc.rs:329
4 xul.dll alloc::alloc::__alloc_error_handler::__rg_oom ../c8dfcfe046a7680554bf4eb612bad840e7631c4b//library/alloc/src/alloc.rs:398
5 xul.dll __rust_alloc_error_handler 
6 xul.dll webrender_bindings::bindings::wr_api_end_builder gfx/webrender_bindings/src/bindings.rs:3824
7 xul.dll mozilla::wr::DisplayListBuilder::End gfx/webrender_bindings/WebRenderAPI.cpp:1017
8 xul.dll mozilla::layers::WebRenderLayerManager::EndTransactionWithoutLayer gfx/layers/wr/WebRenderLayerManager.cpp:446
9 xul.dll mozilla::nsDisplayList::PaintRoot layout/painting/nsDisplayList.cpp:2195

Clearing the Fission Milestone flag. This WR OOM signature spiked on Windows 7 in Beta 94, but Fission's Windows 7 crashiness has been a problem since much earlier than that.

Glenn, opinion on this? Does it remain an S2?