Intermittent crash in /html/rendering/non-replaced-elements/tables/table-column-width.html

[jdm]

  ▶ CRASH [expected TIMEOUT] b'/html/rendering/non-replaced-elements/tables/table-column-width.html'
  │ 
  │ error: XDG_RUNTIME_DIR not set in the environment.
  │ libEGL warning: No hardware driver found, falling back to software rendering
  │ Shouldn't see table column fragments here. (thread LayoutThread PipelineId { namespace_id: PipelineNamespaceId(1), index: PipelineIndex(1) }, at components/layout/display_list/builder.rs:1941)
  │    0: servo::backtrace::print
  │    1: servo::main::{{closure}}
  │    2: std::panicking::rust_panic_with_hook
  │              at /rustc/a8486b64b0c87dabd045453b6c81500015d122d6/library/std/src/panicking.rs:595:17
  │    3: std::panicking::begin_panic::{{closure}}
  │    4: std::sys_common::backtrace::__rust_end_short_backtrace
  │    5: std::panicking::begin_panic
  │    6: layout::display_list::builder::<impl layout::fragment::Fragment>::build_fragment_type_specific_display_items
  │    7: layout::display_list::builder::<impl layout::fragment::Fragment>::build_display_list_no_damage
  │    8: layout::display_list::builder::<impl layout::block::BlockFlow>::build_display_list_for_block_no_damage
  │    9: layout::traversal::BuildDisplayList::traverse
  │   10: layout::traversal::BuildDisplayList::traverse
  │   11: layout::traversal::BuildDisplayList::traverse
  │   12: layout::traversal::BuildDisplayList::traverse
  │   13: layout::sequential::build_display_list_for_subtree
  │   14: profile_traits::time::profile
  │   15: layout_thread::LayoutThread::handle_reflow
  │   16: profile_traits::time::profile
  │   17: layout_thread::LayoutThread::handle_request_helper
  │   18: layout_thread::LayoutThread::start
  │   19: profile_traits::mem::ProfilerChan::run_with_memory_reporting
  │   20: std::sys_common::backtrace::__rust_begin_short_backtrace
  │   21: core::ops::function::FnOnce::call_once{{vtable.shim}}
  │   22: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
  │              at /rustc/a8486b64b0c87dabd045453b6c81500015d122d6/library/alloc/src/boxed.rs:1546:9
  │       <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
  │              at /rustc/a8486b64b0c87dabd045453b6c81500015d122d6/library/alloc/src/boxed.rs:1546:9
  │       std::sys::unix::thread::Thread::new::thread_start
  │              at /rustc/a8486b64b0c87dabd045453b6c81500015d122d6/library/std/src/sys/unix/thread.rs:71:17
  │   23: start_thread
  │   24: clone
  │ [2021-02-25T23:02:32Z ERROR servo] Shouldn't see table column fragments here.
  │ Redirecting call to abort() to mozalloc_abort
  │ 
  │ Stack trace for thread "LayoutThread PipelineId { namespace_id: PipelineNamespaceId(1), index: PipelineIndex(1) }"
  │    0: servo::backtrace::print
 └    1: servo::crash_handler::install::handler