Intermittent crash ("Broken pipe" from RenderApi::add_raw_font/RenderApi::update_resources) in /css-transforms-1_dev/html/transform-iframe-001.htm , /selectors-3_dev/xhtml1print/grid-first-letter-003.xht

[jdm]

  ▶ CRASH [expected PASS] /css-transforms-1_dev/html/transform-iframe-001.htm
  │ 
  │ VMware, Inc.
  │ Gallium 0.4 on softpipe
  │ 3.3 (Core Profile) Mesa 12.0.1
  │ Shutting down the Constellation after generating an output file or exit flag specified
  │ VMware, Inc.
  │ Gallium 0.4 on softpipe
  │ 3.3 (Core Profile) Mesa 12.0.1
  │ called `Result::unwrap()` on an `Err` value: Error { repr: Os { code: 32, message: "Broken pipe" } } (thread main, at ../src/libcore/result.rs:799)
  │ called `Result::unwrap()` on an `Err` value: Error { repr: Os { code: 32, message: "Broken pipe" } } (thread FontCacheThread, at ../src/libcore/result.rs:799)
  │ stack backtrace:
  │    0:     0x7fb73fa435bd - backtrace::backtrace::trace::h6ac07ced1b846a59
  │    1:     0x7fb73fa43c52 - backtrace::capture::Backtrace::new::h1d3339ed08c7f861
  │    2:     0x7fb73e53b6bd - servo::main::_{{closure}}::h8b4407279da88cb5
  │    3:     0x7fb740029975 - std::panicking::rust_panic_with_hook::hcd9d05f53fa0dafc
  │    4:     0x7fb740029842 - std::panicking::begin_panic::hf6c488cee66e7f17
  │    5:     0x7fb740029780 - std::panicking::begin_panic_fmt::hb0a7126ee57cdd27
  │    6:     0x7fb740029701 - rust_begin_unwind
  │    7:     0x7fb740065f1f - core::panicking::panic_fmt::h9af671b78898cdba
  │    8:     0x7fb73fb92a3b - core::result::unwrap_failed::h3ea0c9548cd89371
  │    9:     0x7fb73fb9438d - webrender_traits::api::RenderApi::add_raw_font::h66d583b2a8313c99
  │   10:     0x7fb73f7dc585 - gfx::font_cache_thread::FontCache::get_font_template_info::h39b4de3a8eed056e
  │   11:     0x7fb73f7d4a69 - gfx::font_cache_thread::FontCache::run::hb3a460d97b8cea14
  │   12:     0x7fb73f7af048 - std::panicking::try::do_call::h7b5d668bad54a9ab
  │   13:     0x7fb740031fc6 - __rust_maybe_catch_panic
  │   14:     0x7fb73f7bd443 - _<F as alloc..boxed..FnBox<A>>::call_box::hf5dc5d5b0fb0c4de
  │   15:     0x7fb740027fc0 - std::sys::thread::Thread::new::thread_start::h50b05608a499d2b2
  │   16:     0x7fb73c422183 - start_thread
  │   17:     0x7fb73bf3937c - clone
  │   18:                0x0 - <unknown>
  │ ERROR:servo: called `Result::unwrap()` on an `Err` value: Error { repr: Os { code: 32, message: "Broken pipe" } }
  └ Pipeline failed in hard-fail mode.  Crashing!

[jdm]

Test file doesn't exist any more.