Intermittent crash in /html/semantics/scripting-1/the-script-element/module/crossorigin.html

[jdm]

  ▶ CRASH [expected OK] /html/semantics/scripting-1/the-script-element/module/crossorigin.html
  │ 
  │ 
  │ 
  │ 
  │ [2020-01-06T16:24:48Z ERROR script::dom::bindings::error] Error at http://www2.web-platform.test:8000/html/semantics/scripting-1/the-script-element/module/crossorigin-scripterror.js?pipe=header(Access-Control-Allow-Origin,*):8:1 nonExistentMethod is not defined
  │ [2020-01-06T16:24:48Z ERROR script::script_module] Failed to fetch http://www2.web-platform.test:8000/html/semantics/scripting-1/the-script-element/module/crossorigin-scripterror.js with error Internal("CORS check failed")
  │ [2020-01-06T16:24:48Z ERROR script::script_module] Failed to fetch http://www2.web-platform.test:8000/html/semantics/scripting-1/the-script-element/module/crossorigin-scripterror.js with error Internal("CORS check failed")
  │ Stack trace for thread "ScriptThread PipelineId { namespace_id: PipelineNamespaceId(1), index: PipelineIndex(1) }"
  └ stack backtrace:

Not particularly useful, sadly.