1494720 - Crash in webrender::prim_store::Primitive::prepare_prim_for_render_inner: assertion failed: self.font_contexts.lock_shared_context().has_font(&font.font_key)

Status: RESOLVED WORKSFORME

(Core :: Graphics: WebRender, defect, P3)

Description

[Calixte Denizet (:calixte)]

This bug was filed from the Socorro interface and is
report bp-3fec9a58-a230-4afe-a07a-1c1040180927.
=============================================================

Top 10 frames of crashing thread:

0 xul.dll static void std::panicking::rust_panic_with_hook src/libstd/panicking.rs:485
1 xul.dll static <NoType> std::panicking::begin_panic<str*> src/libstd/panicking.rs:409
2 xul.dll static void webrender::prim_store::Primitive::prepare_prim_for_render_inner gfx/webrender/src/prim_store.rs:2738
3 xul.dll static bool webrender::prim_store::PrimitiveStore::prepare_prim_for_render gfx/webrender/src/prim_store.rs:1812
4 xul.dll static void webrender::prim_store::PrimitiveStore::prepare_primitives gfx/webrender/src/prim_store.rs:1904
5 xul.dll static bool webrender::prim_store::PrimitiveStore::prepare_prim_for_render gfx/webrender/src/prim_store.rs:1639
6 xul.dll static void webrender::prim_store::PrimitiveStore::prepare_primitives gfx/webrender/src/prim_store.rs:1904
7 xul.dll static bool webrender::prim_store::PrimitiveStore::prepare_prim_for_render gfx/webrender/src/prim_store.rs:1639
8 xul.dll static void webrender::prim_store::PrimitiveStore::prepare_primitives gfx/webrender/src/prim_store.rs:1904
9 xul.dll static bool webrender::prim_store::PrimitiveStore::prepare_prim_for_render gfx/webrender/src/prim_store.rs:1639

=============================================================

There are 4 crashes (from 1 installation) in nightly 64 with buildid 20180926220146. In analyzing the backtrace, the regression may have been introduced by patch [1] to fix bug 1494042.

[1] https://hg.mozilla.org/mozilla-central/rev?node=3122696fa3fa

Comment 1

[Calixte Denizet (:calixte)]

The crash reason is: assertion failed: self.font_contexts.lock_shared_context().has_font(&font.font_key)

Comment 2

[Darkspirit]

This happens every few weeks and could be a duplicate of bug 1425181.

> by patch [1] to fix bug 1494042
https://github.com/servo/webrender/compare/2549b791abb3a24c115d03616ddd82e14727b5a1...43e8d85789efb95099affe3257a9c254ef3d2f4c