This bug was filed from the Socorro interface and is report bp-c7c37884-03be-4672-a169-c35d70180822. ============================================================= Seen while looking at nightly crash stats: https://bit.ly/2BJh35p. Fairly low volume crash which might be a result of the recent webrender update, Bug 1481570. Top 10 frames of crashing thread: 0 xul.dll static void std::panicking::rust_panic_with_hook src/libstd/panicking.rs:521 1 xul.dll static void std::panicking::continue_panic_fmt src/libstd/panicking.rs:426 2 xul.dll static void std::panicking::rust_begin_panic src/libstd/panicking.rs:337 3 xul.dll static void core::panicking::panic_fmt src/libcore/panicking.rs:92 4 xul.dll static void core::option::expect_failed src/libcore/option.rs:960 5 xul.dll static void webrender::prim_store::PrimitiveStore::prepare_prim_runs gfx/webrender/src/prim_store.rs:1834 6 xul.dll static union core::option::Option<euclid::rect::TypedRect<f32, webrender_api::units::LayoutPixel>> webrender::prim_store::PrimitiveStore::prepare_prim_for_render gfx/webrender/src/prim_store.rs:1562 7 xul.dll static void webrender::prim_store::PrimitiveStore::prepare_prim_runs gfx/webrender/src/prim_store.rs:1819 8 xul.dll static union core::option::Option<euclid::rect::TypedRect<f32, webrender_api::units::LayoutPixel>> webrender::prim_store::PrimitiveStore::prepare_prim_for_render gfx/webrender/src/prim_store.rs:1562 9 xul.dll static void webrender::prim_store::PrimitiveStore::prepare_prim_runs gfx/webrender/src/prim_store.rs:1819 =============================================================

Some similar bugs, Bug 1480400 and Bug 1418813 which are both a bit older than this one.

(In reply to Marcia Knous [:marcia - needinfo? me] from comment #0) > bp-c7c37884-03be-4672-a169-c35d70180822. > MOZ_CRASH Reason invalid parent! The crash reason has been added by bug 1483303 ( servo/webrender#2972 ).

Only crashed on one day, did you fix this, glenn?

Not that I'm specifically aware of, but lots has changed around there recently which may have incidentally fixed it.

Closing because no crashes reported for 12 weeks.