78.9% of the crash are on 32-bit x86.
Windows 7 is overrepresented: 56.4% of the crashes are on Windows 7 and 41.4% on Windows 10.

Crash report: https://crash-stats.mozilla.org/report/index/c01ab71e-675a-4a7f-af00-e87c40211028

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_api::display_list::DisplayListBuilder::push_item_to_section gfx/wr/webrender_api/src/display_list.rs:1244
7 xul.dll webrender_api::display_list::DisplayListBuilder::push_stacking_context gfx/wr/webrender_api/src/display_list.rs:1761
8 xul.dll webrender_bindings::bindings::wr_dp_push_stacking_context gfx/webrender_bindings/src/bindings.rs:2601
9 xul.dll mozilla::wr::DisplayListBuilder::PushStackingContext gfx/webrender_bindings/WebRenderAPI.cpp:1044

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.

Copying crash signatures from duplicate bugs.

Downgrading to S3 because this isn't particularly actionable. Maybe we'll make it better when we change how we do display lists with WebRender